# Publications

2024

A.M.H.S. Lubis, **A. Putra**, A.S.H.M. Yassir, Irianto, and S.G. Herawan. Structural and acoustical performances of oil palm trunk waste–Elastomeric thermoplastic polyurethane composite, *Heliyon*, Vol. 10, e26426, 2024. Link (Publisher: ELSEVIER. Indexing: Clarivate (WoS). Impact Factor: 4.1)

N.F. Saari, **A. Putra**, R.M. Dan, M.A. Zeli, R. Ramlan, N.A.A. Jalil, and S. Herawan. Estimating natural frequency of pipe with various geometries: Improvement of frequency factors, *Heliyon*, Vol. 10, e26148, 2024. Link (Publisher: ELSEVIER. Indexing: Clarivate (WoS). Impact Factor: 4.1)

S.N. Shah, S. Beddu, S.P. Yap,** A. Putra**, M.N. Othman, C.W. Yuen, K.H. Mo. Physical, strength and acoustic properties of lightweight cement composite with preplaced chemically-treated crumb rubber, *Case Studies in Construction Materials*, Vol. 20, e02821, 2024. Link (Publisher: ELSEVIER. Indexing: Clarivate (WoS). Impact Factor: 6.2)

M. Mohammadi, E. Taban, W.H. Tan, N.B.C. Din,** A. Putra, **U. Berardi. Recent progress in natural fiber reinforced composite as sound absorber material, *Journal of Building Engineering*, Vol. 84, 108514, 2024. Link (Publisher: ELSEVIER. Indexing: Clarivate (WoS). Impact Factor: 6.4)

2023

A. Rino, I. Praseityo, D.R. Andhika, B. Sunendar,** A. Putra**. Development of porous composite ceramic with sugarcane fiber filler for sound absorber materials, *Building Acoustics *2023, 0(0). Link (Publisher: Sage. Indexing: Clarivate (WoS). Impact Factor: 1.7)

M. F. Yahya, R. M. Dan, M. F. Samsubaha, Z. Rashid, **A. Putra**. Study of Axial Vibration of a Motor-Compressor System Using Operational Modal Analysis, *Sound & Vibration*, Vol. 57 (1), pp. 119–131, 2023. Link (Indexing: Scopus. ISSN: 2693-1443)

A. I. Mosa, **A. Putra**, H. A. Mahmod. Evaluating the impact of structural parameters on the acoustic performance of an exhaust muffler with shells, *Eastern- European Journal of Enterprise Technologies*, Vol. 6 (10 (126)), pp. 43–49, 2023. Link (Indexing: Scopus. ISSN: 1729-4061

V. Sekar, **A. Putra**, S. Palaniyappan, S.Y.E. Noum, S. Sivanesan and Y.L. Jiun. Additive manufactured acoustic absorbers made of wood-fiber composites with modified infill patterns. *Wood Material Science and Engineering*. Link (Publisher: Taylor & Francis. Indexing: Clarivate (WoS). Impact Factor: 2.2)

C.Y. Shyh-Qi, N.A.A. Jalil, N.C. Din, C. Pradeepa, **A. Putra**, and W. Azeem. Investigation of the Effectiveness of the Chancel Availability and Geometry of Four Traditional Churches in Malaysia: Simulation Experiment. *Buildings*, Vol. 13(6), 2023. Link (Publisher: MDPI. Indexing: Clarivate (WoS). Impact Factor: 3.32)

Gunawan, I. Prasetiyo, B. Yuliarto, **A. Putra**, Irianto, Investigation on Minute Holes of Woven Fabrics for Wide-Band Micro-Perforated Sound Absorbers, *Buildings* 2023, 13, 663. Link (Publisher: MDPI. Indexing: Clarivate (WoS). Impact Factor: 3.32)

Dg. H. Kassim, **A. Putra**, R. Ramlan, Enhancement of sound absorption of coir fiber using thin layer of kapok fibers, *Journal of Natural Fibers, *20(1), 2023. Link. (Publisher: Taylor & Francis. Indexing: Clarivate (WoS). Impact Factor: 3.507)

V. Sekar, S. Palaniyappan, S.Y.E. Noum, **A. Putra**, S. Sivanesan, D.D.C.V. Sheng, Acoustic absorber made of wood fiber composite developed by compression molding and additive manufacturing, *Wood Research*, 68(1), pp. 68–82, 2023. Link. (Indexing: Clarivate (WoS). Impact Factor: 1.13)

2022

T.H. Tan, S.N. Shah, C.C. Ng, **A. Putra**, M.N. Othman, K.H. Mo, Insulating foamed lightweight cementitious composite with co-addition of micro-sized aerogel and hydrogen peroxide, *Construction and Building Materials*, Vol. 360, 129485, 2022. Link (Publisher: ELSEVIER. Indexing: Clarivate (WoS). Impact Factor: 7.69)

**A. Putra**, M.N. Othman, T. Oliveira, M. Souli, D.H. Kassim, Irianto, S. Herawan, Waste Durian Husk Fibers as Natural Sound Absorber: Performance and Acoustic Characterization, *Buildings* 2022, 12, 1112. Link (Publisher: MDPI. Indexing: Clarivate (WoS). Impact Factor: 3.32)

M.S. Azmi, R. Ismail, **A. Putra**, Correlation of design parameters of lattice structure for highly tuneable vibration isolator, *Journal of Vibration and Control,* 2022. Link (Publisher: SAGE Journals. Indexing: Clarivate (WoS))

A. Esraa, **A. Putra**, A.I. Mosa, R.M. Dan, O.H. Attia, An empirical model for optimizing the sound absorption of single layer MPP based on Response Surface Methodology, *International Journal of Technology*, Vol. 13(3), pp. 496-507, 2022. Link (Publisher: Universitas Indonesia. Indexing: Scopus)

V. Sekar, S.Y.E. Noum, **A. Putra**, S. Sivanesan, D.D.C.V. Sheng, Fabrication of light- weighted acoustic absorbers made of natural fiber composites via additive manufacturing, *International Journal of Lightweight Materials and Manufacture*, Vol. 5, pp. 520-527, 2022. Link (Publisher: KeAi Publishing. Indexing: Scopus)

2021

V. Sekar, S.Y.E. Noum, **A. Putra**, S. Sivanesan, K.C. Chin, Y.S. Wong, D.H. Kassim, Acoustic Properties of Micro-Perforated Panels Made from Oil Palm Empty Fruit Bunch Fiber Reinforced Polylactic Acid, *Sound and Vibration*, Vol. 55 (4), pp. 343-352, 2021. Link (Publisher: Tech Science Press. Indexing: Clarivate (WoS))

A. Munawir, **A. Putra**, I. Prasetiyo, and W.M.F.W. Mohamad, Corrected statistical energy analysis model in a non-reverberant acoustic space, *Sound and Vibration*, Vol. 55(3), pp. 203-219, 2021. Link (Publisher: Tech Press Science. Indexing: Clartivate (WoS))

G.W. Leong, T.Z. Chin, K.H. Mo, Z. Ibrahim, **A. Putra**, M.N. Othman, Incorporation of crumb rubber and air-entraining agent in ultra-lightweight cementitious composite: Evaluation of mechanical and acoustic properties, *Journal of Building Engineering*, Vol. 42, 103034, 2021. Link (Publisher: ELSEVIER. Indexing: Clarivate (WoS). Impact Factor: 2.38)

V. Sekar, S.Y.E. Noum, S. Sivanesan, **A. Putra**, D.D.C.V. Sheng, D.H. Kassim, Effect of Thickness and Infill Density on Acoustic Performance of 3D Printed Panels made of Natural Fiber Reinforced Composites, *Journal of Natural Fibers*, 2021. Link (Publisher: Taylor and Francis. Indexing: Clarivate (WoS). Impact Factor: 5.3)

D.D. Abdi, M. Monazzam, E. Taban, **A. Putra**, F. Golbabaei, M. Khadem, Sound absorption performance of natural fiber composite from chrome shave and coffee silver skin, *Applied Acoustics*, Vol. 182, 108264, 2021. Link (Publisher: ELSEVIER: Clarivate (WoS). Impact Factor: 2.6)

S.N. Shah, K.H. Mo, S.P. Yap, **A. Putra**, M.N. Othman, Assessment of lightweight recycled crumb rubber-cement composite produced by preplaced method, *Advances in Concrete Construction*, Vol. 11(5), 2021. Link (Publisher: Techno-Press, Ltd. Indexing: Clarivate (WoS). Impact Factor: 2.4)

A. Ngatiman, M.Z. Nuawi, **A. Putra**, I.S. Qamber, T. Sutikno and M.H. Jopri, Spark plug failure detection using Z-freq and machine learning, *TELKOMNIKA*, Vol. 19 (6), pp. 2020-2029, 2021. Link (Publisher: Penerbit Universitas Ahmad Dahlan. Indexing: Scopus)

L. Mu, Z.A. Zulkefli, N.A.A. Jalil, **A. Putra**, M.N. Othman, and R.M.K.R. Ahmad, Experimental investigation of an acoustic metamaterial barrier design composed of a square prism within a hexagonal recess, *ASEAN Engineering Journal*, Vol. 11 (3), pp. 57-70, 2021. Link (Publisher: Penerbit UTM. Indexing: Scopus)

M.S. Azmi, R. Ismail, M.N. Nurdin, **A. Putra**, Numerical Analysis on Static and Dynamic Behavior of Additively Manufactured BCC Lattice Structures, *Journal of Mechanical Engineering Research and Developments*, Vol. 44 (5), pp. 75-86, 2021. Link (Publisher: The Scientific Press. Indexing: Scopus)

2020

E. Taban, P. Soltani, U. Berardi, **A. Putra**, A.J. Jafari, S.M. Mousavi, M. Faridan, S.E. Samaei, A. Khavanin, Measurement, modeling, and optimization of sound absorption performance of Kenaf fibers for building applications, *Building and Environment*, Vol. 180, 2020. Link (Publisher: ELSEVIER. Indexing: Clarivate (WoS). Impact Factor: 4.8)

M.H. Mustaffer, R. Ramlan, M.N.A. Rahman, **A. Putra**, Experimental characterization and performance of dynamic vibration absorber with tunable piecewise linear stiffness, *Journal of the Brazilian Society of Mechanical Sciences and Engineering*, Vol. 42(355), 2020. Link (Publisher: Springer. Indexing: Thomson Reuters (WoS). Impact Factor: 1.75)

T.S. Tie, K.H. Mo, **A. Putra**, S.C. Loo, U.J. Alengaram, T.-C. Ling, Sound absorption performance of modified concrete: A review, *Journal of Building Engineering*, Vol. 30, July 2020. Link (Publisher: ELSEVIER. Indexing: Thomson Reuters (WoS). Impact Factor: 2.38)

A.I. Mosa, **A. Putra**, R. Ramlan, A.A. Esraa, Absorption Coefficient of a Double-Layer Inhomogeneous Micro-perforated Panel Backed with Multiple Cavity Depths, *Acoustics Australia*, 2020. Link (Publisher: SPRINGER. Indexing: Thomson Reuters (WoS). Impact Factor: 0.6)

A.I. Mosa, **A. Putra**, R. Ramlan, A.A. Esraa, Wideband sound absorption of a double- layer microperforated panel with inhomogeneous perforation, *Applied Acoustics*, Vol. 161, 2020. Link (Publisher: ELSEVIER. Indexing: Thomson Reuters (WoS). Impact Factor: 1.068)

I. Prasetiyo, E. Muqowi, **A. Putra**, M. Novenbrianty, G. Dasendra, D.R. Adhika, Modelling Sound Absorption of Tunable Double Layer Woven Fabrics, *Applied Acoustics*, Vol. 157, 2020 doi: Link (Publisher: ELSEVIER. Indexing: Thomson Reuters (WoS). Impact Factor: 1.2)

A. Esraa, **A. Putra**, R.M. Dan, A.I. Mosa, Sound absorption of MPP with Irregular hole distribution, *International Journal of Advanced Research in Engineering and Technology*, Vol. 11 (12), pp. 638-648, 2020. Link (Publisher: IAEME Publication)

M.H. Mustaffer, R. Ramlan, W.A.F.W. Hashim, M.N.A. Rahman, **A. Putra**, Wideband Non-linear Vibration Piezoelectric Energy Harvesting Using a Piecewise-linear Mechanism, *International Journal of Nanoelectronics and Materials*, Vol. 13 (3), pp. 523-536, 2020. Link (Publisher: UniMAP Publication. Indexing: Scopus)

**A. Putra**, M.H. Jamil, I. Prasetiyo, R. Ismail, Dg. H. Kassim, Effect of Fabric Layer on Sound Absorption of Micro-Perforated Panel, *International Journal on Engineering Applications*, Vol. 8 (2), pp. 41-46, 2020. Link (Publisher: Praise Worthy Prize. Indexing: Scopus)

2019

E. Taban, A. Khavanin, A. Ohadi, **A. Putra**, A.J. Jafari, M. Faridan, A. Soleimanian, Study on the acoustic characteristics of natural date palm fibres: Experimental and theoretical approaches, *Building and Environment*, Vol. 161, 2019. Link (Publisher: ELSEVIER. Indexing: Thomson Reuters (WoS). Impact Factor: 4.8)

A.I. Mosa, **A. Putra**, R. Ramlan, I. Prasetiyo, A.A. Esraa, Theoretical model of absorption coefficient of an inhomogeneous MPP absorber with multi-cavity depths, *Applied Acoustics*, Vol. 146 pp. 409-419, 2019. Link (Publisher: ELSEVIER. Indexing: Thomson Reuters (WoS). Impact Factor: 1.068)

A.R.A. Rahman, E.A. Ariffin, M.H. Abu, F.A. Munir, **A. Putra**, Experimental Investigation of Thermally Induced Vibration in Sulphur Recovery Unit (SRU), *Journal of Advanced Research in Fluid Mechanics and Thermal Sciences*, Vol. 56 (1), pp. 78-87, 2019. Link (Publisher: Akademia Baru. Indexing: Scopus)

N. Azahari, **A. Putra**, R.M. Dan, M.N. Othman, Sound insulation performance of kenaf fibre as a noise control treatment in car using statistical energy analysis, *Defence S and T Technical Bulletin*, Vol. 12 (1), pp. 136-149, 2019. (Publisher: Science & Research Technology Institute for Defense. Indexing: Scopus)

A.H.A. Hamid, R.M. Dan, **A. Putra**, Putra, A., M.N. Sudin, R.K. Mazlan, Wear be- haviour of A-C:H helical gear through particle generation, *Defence S and T Technical Bulletin*, Vol. 12 (1), pp. 161-175, 2019. Link (Publisher: Science & Research Technology Institute for Defense. Indexing: Scopus)

2018

**A. Putra**, K.H. Or, M. Z. Selamat, M.J.M. Nor, M.H. Hassan, I. Prasetyo, Sound absorption of extracted pineapple-leaf fibres, *Applied Acoustics*, Vol. 136, pp. 9-15, 2018. Link (Publisher: ELSEVIER. Indexing: Thomson Reuters (WoS). Impact Factor: 1.068)

Z. Y. Lim, **A. Putra** and M.J.M. Nor, M.Y. Yaakob, Sound absorption performance of natural kenaf fibres, *Applied Acoustics*, Vol. 130, pp. 107-114, 2018. Link (Publisher: ELSEVIER. Indexing: Thomson Reuters (WoS). Impact Factor: 1.068)

S. G. Herawan, K. Talib, **A. Putra**, A.F. Ismail, S. A. Shamsudin, M.M. Tahir, Prediction of generated power from steam turbine waste heat recovery mechanism system on naturally aspirated spark ignition engine using artificial neural network, *Soft Computing*, Vol. 22(18), pp. 5955-5964, 2018. Link (Publisher: Springer. Indexing: Thomson Reuters (WoS))

Q. Ahsan, W.T. Hui, I.S. Othman, L.P. Jun, **A. Putra**, Preparation and Characterization of Natural Fiber Filled Asphalt Based Damping Material, *Journal of Advanced Research in Fluid Mechanics and Thermal Sciences*, Vol. 47 (1), pp. 8-15, 2018. Link (Publisher: Akademia Baru. Indexing: Scopus)

A.I. Mosa, **A. Putra**, A.A. Esraa, Micro-perforated panel absorber arrangement technique: A review, *Journal of Advanced Research in Dynamical and Control Systems*, Vol. 10 (7), pp. 372-381, 2018 (Publisher: Institute of Advanced Scientific Research. Indexing: Scopus)

N.S. Muhammad, A.F.A. Ghani, Rokhmadi, A.R. Dullah, **A. Putra**, Enhancement of defect signature for acoustic wave source location from two wave modes in pipe, *Defence S and T Technical Bulletin*, Vol. 11 (2), pp. 287-298, 2018 (Publisher: Science & Research Technology Institute for Defense. Indexing: Scopus)

T. Hermanto, R. Jenal, A.R. Dullah, **A. Putra**, N.S. Muhammad, Effect of low frequency excitation for crack detection using nonlinear vibro-acoustic modulation method, *Defence S and T Technical Bulletin*, Vol. 11 (2), pp. 277-286, 2018 (Publisher: Science & Research Technology Institute for Defense. Indexing: Scopus)

M. Razi, M.A. Yusuff, K.A. Zakaria, **A. Putra**, Stream flow analysis for small hydropower system based on run-of-river schemes, *ARPN Journal of Engineering and Applied Sciences*, Vol. 13 (3), pp. 1115-1118, 2018. Link (Publisher: Asian Research Publishing Network. Indexing: Scopus)

2017

K. H. Or, **A. Putra** and M. Z. Selamat, Oil palm empty fruit bunch fiber as sustainaible acoustic absober, *Applied Acoustics*, Vol. 119, pp. 9-16, 2017. Link (Publisher: ELSEVIER. Indexing: Thomson Reuters (WoS). Impact Factor: 1.068)

Y. M. Cheah, **A. Putra**, N. Muhammad, A.R. Dullah and R. Jenal, Modeling dynamics of a building using a portal frame approach, *International Review of Modeling and Simulation*, Vol. 10 (4), pp. 289-295, 2017. Link (Publisher: Praise Worthy Prize. Indexing: Scopus)

K. Wong, Q. Ahsan, **A. Putra**, S. Subramonian, M.J.M. Nor, Preliminary study on the sound absorption behavior of spent tea leaves filled with natural rubber latex binder, *Jurnal Teknologi*, Vol. 79, pp. 59–64, 2017. Link (Publisher: UTM Malaysia. Indexing: Scopus)

Dg. Hafizah, **A. Putra**, M. J. M. Nor, A. N. Haznida, Preliminary study of acoustical treatment in a scaled model mosque, *International Review on Mechanical Engineering*, Vol. 11(4), pp. 222–227, 2017. Link (Publisher: Praise Worthy Prize. Indexing: Scopus)

K. Wong, Q. Ahsan, **A. Putra**, S. Subramonian, N. Mohamad and M. J. M. Nor, Acoustic benefits of ecofriendly spent tea leaves filled porous material, *Key Engineering Materials*, Vol. 739, pp 125-134, 2017. Link (Publisher: Trans Tech Publications. Indexing: Scopus)

2016

S. G. Herawan, A. H. Rohhaizan, A. F. Ismail, S. A. Shamsudin, **A. Putra**, M. T. Musthafah and A. R. Awang, Prediction on Power Produced from Power Turbine as a Waste Heat Recovery Mechanism on Naturally Aspirated Spark Ignition Engine Using Artificial Neural Network, *Modelling and Simulation in Engineering*, Vol. 2016, Article ID 5072404, 12 pages. Link (Publisher: Hindawi. Indexing: Thomson Reuters (WoS). ISSN: 1687-5605)

F. A. Khair, **A. Putra**, M. J. M Nor, M. Z. Selamat, Analysis of sound absorption of hollow tube structure, *International Journal of Automotive and Mechanical Engineering*, Vol. 13(2), pp. 3492–3502, 2016. Link (Publisher: Universiti Malaysia Pahang. Indexing: Scopus. ISSN: 2180-1606)

A. N. Kasim, M. Z. Selamat, M. A. M. Daud, M.Y. Yaakob, **A. Putra**, D. Sivakumar, Mechanical properties of polypropylene composites reinforced with alka- line treated pineapple leaf fibre from Josapine cultivar, *International Journal of Automotive and Mechanical Engineering*, Vol. 13(1), pp. 3157–3167, 2016. Link (Publisher: Universiti Malaysia Pahang. Indexing: Scopus)

K. H. Lim, **A. Putra**, D.J. Thompson, N. Muhammad, Preliminary Study on Characteristics of Sound Radiation from Beam-Stiffened Plates, *International Review on Mechanical Engineering*, Vol. 10(4), pp 272, 2016. Link (Publisher: Praise Worthy Prize. Indexing: Scopus)

Y. M. Cheah, **A. Putra**, K. H. Lim, R. Ramlan, N. Muhammad, Identifying Structure-Borne Noise Transmission in Building, *International Review on Mechanical Engineering*, Vol. 10(3), pp. 131–140, 2016. Link (Publisher: Praise Worthy Prize. Indexing: Scopus)

I. R. A. Rossainily, M. A. Salim, M. R. Manor, M. Z. Akop, **A. Putra**, M. T. Musthafah, M. Z. Hassan, M. N. Abdul Rahman and M. N. Sudin, Effect of carbon black fillers on tensile stress of unvulcanised natural rubber compound, *Journal of Mechanical Engineering and Sciences*, Vol. 10, pp. 2043–2052, 2016. Link (Publisher: Universiti Malaysia Pahang. Indexing: Scopus)

2015

**A. Putra**, F. A. Khair and M. J. M. Nor, Utilizing hollow-structured bamboo as natural sound absorber, *Archives of Acoustics*, Vol. 40, pp. 601-608, 2015. Link (Publisher: Polish Acoustical Society. Indexing: Thomson Reuters (WoS). Impact Factor: 0.98)

A. Putra, Al Munawir and W. M. Farid, Corrected statistical energy analysis model for car interior noise, *Advances in Mechanical Engineering*, Vol. 7, No. 1, 2015, Article ID 304283. Link (Publisher: SAGE. Indexing: Thomson Reuters (WoS). Impact Factor: 0.575)

G. Squicciarini, **A. Putra**, D. J. Thompson, X. Zhang and M. A. Salim, Use of a reciprocity technique to measure the radiation efficiency of a vibrating structure, *Applied Acoustics*, Voll. 89, pp.107-121, 2015. Link (Publisher: ELSEVIER. Indexing: Thomson Reuters (WoS). Impact Factor: 1.068)

Dg. Hafizah, **A. Putra** and M. J. M. Nor, The Acoustical Characteristics of the Sayyidina Abu Bakar Mosque, UTeM, *Journal of Engineering Science and Technology*, Vol. 10, No. 1, pp. 97-110, 2015. Link (Publisher: Taylor’s University. Indexing: Scopus)

M. A. Salim, **A. Putra** and M. A. Abdullah, Horizontal displacement of laminated rubber-metal spring for engine isolator, *Journal of Engineering and Applied Sciences*, Vol. 10, pp 7841-7846, 2015. (Publisher: Asian Research Publishing Network. Indexing: Scopus)

M. A. Salim, M. R. Mansor, M. T. Musthafah, M. Z. Akop, **A. Putra**, M. A. Abdullah, Computation of Eigenvalue-Eigenvector and Harmonic Motion Solution for Laminated Rubber-Metal Spring, *Journal of Engineering and Technology*, Vol. 6(2), pp. 151-164, 2015. Link (Publisher: MTUN)

2014

**A. Putra**, Y. M. Cheah, N. Muhammad, A. Rivai and C. M. Wai, The effect of perforation on the dynamics of a flexible panel, *Advances in Acoustics and Vibration*, Vol. 2014, Article ID 526045. Link (Publisher: Hindawi. Indexing: Thomson Reuters (WoS))

K. Suhaimi, R. Ramlan, **A. Putra**, A combined softening and hardening mode energy harvesting device for low frequency human motion application, *Advances in Acoustics and Vibration*, Vol. 2014, Article ID 217032. Link (Publisher: Hindawi. Indexing: Thomson Reuters (WoS))

**A. Putra** and A. Y. Ismail, Normal Incidence of Sound Transmission Loss from Perforated Plates with Micro and Macro Size Holes, *Advances in Acoustics and Vibration*, Vol. 2014. Article ID 240942. Link (Publisher: Hindawi. Indexing: Thomson Reuters (WoS))

Dg. H. Kassim, **A. Putra**, M. J. M. Nor, A. N. S. Muhammad, Effect of pyramidal dome geometry on the acoustical characteristics in a mosque, *Journal of Mechanical Engineering and Sciences*, Vol. 7, pp. 1127–1133, 2014. Link (Publisher: Universiti Malaysia Pahang. Indexing: Scopus)

S. G. Herawan, A. H. Rohhaizan, **A. Putra** and A. F. Ismail, Prediction of waste heat energy recovery performance in a naturally aspirated engine using artificial neural network, *ISRN Mechanical Engineering*, Vol. 2014, Article ID 240942. Link (Publisher: Hindawi. Indexing: Scopus)

M. A. Salim, **A. Putra**, and M. A. Abdullah, Mathematical formulation for bending wave in non-dispersive finite rod, *International Review of Modeling and Simulation*, Vol. 7 (3), pp. 523-530, 2014 (Publisher: Praise Worthy Prize. Indexing: Scopus)

M. A. Salim, M. A. Abdullah and **A. Putra**, Predicted transmissibility of an experimental approach for a laminated rubber-metal spring, *American-Eurasian Journal of Sustainable Agriculture*, Vol. 8(4), pp 104-110, 2014 (Publisher: AENSI. Indexing: Scopus)

2013

**A. Putra**, A. Y. Ismail, R. Ramlan, Md R. Ayob and M. S. Py, Normal incidence of sound transmission loss of a double-leaf partition inserted with a micro-perforated panel, *Advances in Acoustics and Vibration*, Vol. 2013. Link (Publisher: Hindawi. Indexing: Thomson Reuters (WoS))

**A. Putra**, Y. Abdullah, H. Efendy, W. M. F. W. Mohamad and N. L. Salleh, Biomass from paddy waste fiber as sustainable acoustic material, *Advances in Acoustics and Vibration*, Vol. 2013. Article ID 605932. Link (Publisher: Hindawi. Indexing: Thomson Reuters (WoS))

**A. Putra**, N. F. Saari, H. Bakri, R. Ramlan and R. M. Dan, Char- acterisation of Structure-Borne Sound Source Using Reception Plate Method, *The Scientific World Journal*, Vol. 2013. Article ID 742853, 9 pages. Link (Publisher: Hindawi. Indexing: Thomson Reuters (WoS). Impact Factor: 1.732)

S. G. Herawan, M. A. Ahmad, **A. Putra** and A. A. Yusof, Effect of CO2 Flow Rate on the Pinang Frond Based Activated Carbon for Methylene Blue Removal, *The Scientific World Journal*, Vol. 2013. Link (Publisher: Hindawi. Indexing: Thomson Reuters (WoS). Impact Factor: 1.732)

M. A. Salim, **A. Putra**, M. A. Abdullah, A. Noordin and B. T. Tee, Peak amplitude transmission on high-rise structure by implementing TMD method, *Advanced Science Letters*, Vol. 19, No. 1, pp. 142-146, 2013

(Publisher: American Scientific Publishers)

S. G. Herawan, M. S. Hady, Md. R. Ayob and **A. Putra**, Characterization of activated carbons from oil-palm shell by CO2 activation with no holding carbonization temperature,* The Scientific World Journal*, Vol. 2013. Link (Publisher: Hindawi. Indexing: Thomson Reuters (WoS). Impact Factor: 1.732)

**A. Putra**, M. Y. Abd, N. A. A. Jalil and S. Susilo, Modeling of Dynamic Response of Beam-Type Vibration Absorbing System Excited by a Moving Mass, *International Review of Mechanical Engineering*, Vol. 7 (5), pp. 813-820, 2013. Link (Publisher: Praise Worthy Prize. Indexing: Scopus)

**A. Putra**, Y. Abdullah, H. Efendy, W. M. F. Wan Mohamad, Md. R. Ayob and M. S. Py, Utilizing sugarcane wasted fibers as a sustainable acoustic absorber, *Procedia Engineering*, Vol. 53, pp. 632-638, 2013. Link (Publisher: ELSEVIER. Indexing: Scopus)

**A. Putra**, A. Y. Ismail and Md R. Ayob, Sound transmission loss of a double-leaf partition with micro-perforated plate insertion under diffuse field incidence, *International Journal of Automotive and Mechanical Engineering*, Vol. 7 (January-June 2013), pp. 1086-1095, 2013. Link (Publisher: Universiti Malaysia Pahang. Indexing: Scopus)

**A. Putra** and B. R. Mace, The effect of uncertainty in the excitation on the vibra- tion input power to a structure, Advances in Acoustics and Vibration, Vol. 2013. Link (Publisher: Hindawi. Indexing: Scopus)

Y. Abdullah, **A. Putra**, H. Efendy, W. M. Farid and M. R. Ayob, Investigation on sound absorption coefficient of natural paddy fibers, *International Journal of Renewable Energy Resources*, Vol. 3, pp. 8-11, 2013. Link (Publisher: UMPEDAC)

**A. Putra**, O. K. Hee, S. H. Yahaya, On investigating C-Transition curve for noise reduction, *Journal of Engineering and Technology*, Vol. 4(2), 2013. Link (Publisher: MTUN)

2012

**A. Putra**, F. A. Munir and C. D. Juis, On a simple technique to measure the airborne noise in a car interior using substitution source, *International Journal of Vehicle Noise and Vibration*, Vol. 8, No. 3, pp. 275-287, 2012. Link (Publisher: Inderscience. Indexing: Scopus)

M. Y. Abd, **A. Putra**, N. A. A. Jalil and J. Noorzaei, Effects of structural parameters on the dynamics of a beam structure with a beam-type vibration absorber, *Advances in Acoustics and Vibration*, Vol. 2012. Link (Publisher: Hindawi. Indexing: Scopus. e-ISSN: 1687-627X)

2011

**A. Putra** and D. J. Thompson, Radiation efficiency of perforated and unbaffled plates near a reflecting rigid surface, *Journal of Sound and Vibration*, Vol. 330, pp. 5443- 5459, 2011. Link (Publisher: ELSEVIER. Indexing: Thomson Reuters (WoS). Impact Factor: 1.332)

A. Y. Ismail, **A. Putra** and M. R. Ayob, Sound transmission loss of a double-leaf solid- microperforated partition under normal incidence of acoustic loading, *IIUM Engineering Journal*, Special Issue in Mechanical Engineering, Vol. 12, pp. 162-174, 2011. Link (Publisher: International Islamic University Malaysia)

2010

**A. Putra** and D. J. Thompson, Sound radiation from rectangular baffled and unbaffled plates, *Applied Acoustics*, Vol. 71, pp. 1113-1125, 2010. Link (Publisher: ELSEVIER. Indexing: Thomson Reuters (WoS). Impact Factor: 1.6)

**A. Putra** and D. J. Thompson, Sound radiation from perforated plates, *Journal of Sound and Vibration*, Vol. 329, pp. 4227-4250, 2010. Link (Publisher: ELSEVIER. Indexing: Thomson Reuters (WoS). Impact Factor: 4.76)

**A. Putra**, T. Oliveira, M. Souli, Dg. H. Kassim, Characterizing and modeling of acoustical performance of natural sound absorber, In: Moatamedi M., Rahulan T., Khawaja H. (eds) *Multiphysics Simulations in Automotive and Aerospace Applications*. Elsevier, pp. 49-61. 2021. ISBN: 978-0-12-817899-7. Link (Indexing: Scopus)

**A. Putra**, I. Prasetiyo, M.Z. Selamat, Green Acoustic Absorber from Pineapple Leaf Fibers, In: Jawaid M., Asim M., Tahir P., Nasir M. (eds) *Pineapple Leaf Fibers. Green Energy and Technology*. Springer, pp. 143-165. 2020. ISBN: 978-981-15-1416-6. Link (Indexing: Scopus)

M.A. Salim, **A. Putra**, M.H.A. Al-Mola, N.M. Yusof, M.R. Mansor, Dynamic analysis of a laminated rubber-metal spring vibration isolator for sustainable design, In *Design for Sustainability: Green Materials and Processes*. Elsevier, pp. 105-136, 2021. Link (Indexing: Scopus)

M.A. Salim, **A. Putra**, A.M. Saad, Characteristics of Non-Dispersive Finite Rod for Laminated Rubber-Metal Spring, In *Reference Module in Materials Science and Materials Engineering*. Elsevier. Link (Indexing: Scopus)

2019

Dg. H. Kassim, **A. Putra**, M. F. S. Che Hamid, and M. R. Alkahari , Sound Absorption of BCC Lattice Structures, Lecture Notes in Mechanical Engineering, pp. 67-79. Publisher: Springer. Indexing: Scopus

Q. Ahsan, A.F.A. Mawardi, S. Subramonian, M.R. Alkahari, **A. Putra**, M.N. Nurdin, Effect of Aluminum Surface Treatment on the Damping Properties of Aluminum-Rubber Bonding System, Proceedings of the International Manufacturing Engineering Conference & The Asia Pacific Conference on Manufacturing Systems, pp. 497-502. Indexing: Scopus

M.S. Azmi, R. Ismail, R. Hasan, **A. Putra**, M.N. Nurdin, Effect of damage on vibration characteristic of FDM printed lattice structure material, Proceedings of Mechanical Engineering Research Day 2019, pp. 271-272. Indexing: WoS

A. Esraa, **A. Putra**, A.I. Mosa, R.M. Dan, Study of sound absorption of micro perforated panel with visco-thermal effects, Proceedings of Mechanical Engineering Research Day 2019, pp. 280-281. Indexing: WoS

M.S. Hamdan, **A. Putra**, M.R. Alkahari, Development of 3D-printed vibration dynamic absorber, Proceedings of Mechanical Engineering Research Day 2019, pp. 282-283. Indexing: WoS

M.F.S.C. Hamid, **A. Putra**, D.H. Kassim, M.R. Alkahari, 3D-printed lattice structure as sound absorber, Proceedings of Mechanical Engineering Research Day 2019, pp. 282- 283. Indexing: WoS

A.I. Mosa, **A. Putra**, R. Ramlan, A. Esraa, Parametric study on absorption coefficient of inhomogeneous double- layer MPP, Proceedings of Mechanical Engineering Research Day 2019, pp. 277-279. Indexing: WoS

2018

N. Azahari, **A. Putra**, R. M. Dan, M.N. Othman, N.H. Ismail, A.M. Sood, M.J.A. Jamil, Modelling sound transmission loss of car door seal using hybrid Finite Element Analysis and Statistical Energy Analysis, Proceedings of International Conference on Progress in Automotive Technologies (ICPAT), 10-12 May 2018, Istanbul, Turkey Indexing: Google Scholar

S.G. Herawan, K. Talib, **A. Putra**, Prediction of heat energy from the naturally aspi- rated internal combustion engine exhaust gas using artificial neural network, Procedia Computer Science, Vol. 135, pp. 267-274, 2018 (Publisher: Elsevier)

T. Hermanto, A.R. Dullah, N.S. Muhammad, **A. Putra**, R.M. Dan, A.F.A. Ghani, Effect of low frequency excitation location for crack detection in nonlinear vibro-acoustic method, Proceedings of Mechanical Engineering Research Day 2018, pp. 305-306. Indexing: WoS

A.I. Mosa, **A. Putra**, R. Ramlan, A. Esraa, Z. Halim, Parametric study on performance of an inhomogeneous MPP absorber, Proceedings of Mechanical Engineering Research Day 2018, pp. 303-304. Indexing: WoS

M.Z. Selamat, A.K.M. Shobi, S.D. Malingam, **A. Putra**, M.Y. Yaakob, M.A.M. Daud, Effect of glycerol on the physical and mechanical properties of pineapple leaf fibre starch composite, Proceedings of Mechanical Engineering Research Day 2018, pp. 251-253. Indexing: WoS

M.H. Mustaffer, R.Ramlan, M.N.A. Rahman, **A. Putra**, Static analysis of tunable piecewise stiffness mechanism using vertically constrained cantilever beam, Proceedings of Mechanical Engineering Research Day 2018, pp. 299-300. Indexing: WoS

M.Z. Selamat, M.S.Z. Tahir, A.N. Kasim, S. Dharmalingam, **A. Putra**, M.Y. Yaakob, M.AM. Daud, Effect of starch sizes particle as binder on short pineapple leaf fiber composite mechanical properties, MATEC Web of Conferences, 150, 04008, 2018 (Publisher: EDP Sciences. Indexing: Scopus)

2017

K. H. Lim, **A. Putra**, R. Ramlan, Validation of Radiation efficiency using Maidanik’s Formula, Proceedings of Mechanical Engineering Research Day 2017, pp. 454-455. Indexing: WoS

Z. Y. Lim, **A. Putra**, M. J. M. Nor, M. Y. Yaakob, Effect of perforated plate on sound absorption of kenaf fibre, Proceedings of Mechanical Engineering Research Day 2017, pp. 456-457. Indexing: WoS

F. A. Khair, **A. Putra**, M. J. M. Nor, M. Z. Selamat, Effect of tube length on the acoustical performance of plastic hollow tube sound absorber, Proceedings of Mechan- ical Engineering Research Day 2017, pp. 458-459. Indexing: WoS

M. H. Jamil, **A. Putra**, M. J. M. Nor, K. H. Or, Z. Y. Lim, Sound absorption perfor- mance of suspended fabric, Proceedings of Mechanical Engineering Research Day 2017, pp. 460-461. Indexing: WoS

M. H. Hassan, **A. Putra**, M. Z. Selamat, K. H. Or, A. R. Dullah, Acoustic characteristic of pineapple leaf fibre, Proceedings of Mechanical Engineering Research Day 2017, pp. 462-464. Indexing: WoS

K. H. O, **A. Putra**, R. M. Dan, Z. Y. Lim, Comparison of sound absorption perfor- mance of aluminium and cardboard micro-perforated panel, Proceedings of Mechanical Engineering Research Day 2017, pp. 468-470. Indexing: WoS

Y. H. Abdullah, **A. Putra**, M. J. M. Nor, Z. Y. Lim, R. M. Dan, Comparison of sound absorption performance of aluminium and cardboard micro-perforated panel, Proceedings of Mechanical Engineering Research Day 2017, pp. 471-473. Indexing: WoS

R. M. Dan, A. H. A. Hamid, M. A. Seron, **A. Putra**, R. K. Mazlan, Vibration analysis of centrifugal pump caused by impeller erosion, Proceedings of Mechanical Engineering Research Day 2017, pp. 478-479. Indexing: WoS

R. K. Mazlan, R. M. Dan, N, **A. Putra**, M. Z. Zakaria, A. H. A. Hamid, Experimental investigation on the relationship between current and alternator temperature and battery voltage, Proceedings of Mechanical Engineering Research Day 2017, pp. 44–45. Indexing: WoS

A. H. A. Hamid, R. M. Dan, N. I. Zulkafli, **A. Putra**, R. K. Mazlan, Investigation of the wear characteristics of helical gear using wear debris analysis, Proceedings of Mechanical Engineering Research Day 2017, pp. 381–382. Indexing: WoS

K. Talib, S. G. Herawan, M. M. Tahir, **A. Putra**, S. A. Shamsudin, Study on waste heat recovery from exhaust gas spark ignition (SI) engine using steam turbine mechanism, MATEC Web of Conferences 2017, Vol. 90. DOI: 10.1051/matecconf/20179001057

Z.Y. Lim, **A. Putra**, M. J. M. Nor, N. Muhammad, Sound absorption of multilayer natural coir and kenaf fibres, Proceedings of the 23rd International Conference of Sound and Vibration (ICSV 23) 2016, Athens, Greece, 7 pages (Indexing: Scopus. ISBN: 978-616-551-682-2. ISSN: 2329-3675)

K.H. Or, **A. Putra**, M. J. M. Nor, M. Z. Selamat, Z. Y. Ling, Sound absorption performance of oil palm empty fruit bunch fibres, Proceedings of the 23rd International Conference of Sound and Vibration (ICSV 23) 2016, Athens, Greece, 8 pages (Indexing: Scopus. ISBN: 978-616-551-682-2. ISSN: 2329-3675)

2016

F. A. Khair, **A. Putra**, M. J. M. Nor, M. Z Selamat, Enhancement on acoustical perfor- mance of reed’Imperata Cylindrica’, Proceedings of Mechanical Engineering Research Day 2016, Melaka, Malaysia, pp. 192-193. Indexing: WoS

S. N. Jamaluddin, **A. Putra**, M. A. Salim, R. Ramlan, Dynamic analysis of laminated rubber-metal spring using finite element method, Proceedings of Mechanical Engineering Research Day 2016, Melaka, Malaysia, pp. 210-211. Indexing: WoS

Y. M. Cheah, **A. Putra**, R. Ramlan, N. Muhammad, Identification of noise in room due to HVAC system, Proceedings of Mechanical Engineering Research Day 2016, Melaka, Malaysia, pp. 208-209. Indexing: WoS

K. H. Lim, **A. Putra**, R. Ramlan, Radiation efficiency of single beam-stiffened plate, Proceedings of Mechanical Engineering Research Day 2016, Melaka, Malaysia, pp. 200- 201. Indexing: WoS

K. H. Or, **A. Putra**, M. Z. Selamat, Mathematical modeling on sound absorption of oil palm empty fruit bunch fibers, Proceedings of Mechanical Engineering Research Day 2016, Melaka, Malaysia, pp. 214-215. Indexing: WoS

M. Z. Selamat, A. N. Kasim, M. A. M. Daud, M. Y. Yaakob, **A. Putra**, D. Sivakumar, Comparative study of polypropylene composites reinforced with pineapple leaf fiber from Josapine and Sarawak cultivar, Proceedings of Mechanical Engineering Research Day 2016, Melaka, Malaysia, pp. 114-116. Indexing: WoS

**A. Putra**, F. A. Khair, M. J. M. Nor, Enhancement of acoustical performance of hollow tube sound absorber, AIP Conference Proceedings, 2016. Indexing: Scopus

Z. Y. Lim, **A. Putra**, M. J. M. Nor, Natural coir fiber and kenaf fiber as multilayer sound absorber, Proceedings of Mechanical Engineering Research Day 2016, Melaka, Malaysia, pp. 114-116. Indexing: WoS

2015

M. Z Salim, M. A. Abdullah and **A. Putra**, Modelling of mullins effect on laminated rubber-metal spring, Applied Mechanics and Materials, Vol. 699, pp 331-335, 2015 (Publisher: Trans Tech Publications. Indexing: Scopus. ISSN: 1660-9336)

S. Susilo, **A. Putra** and K. S. Leong, Modeling of piezoelectric acoustic energy harvester, Applied Mechanics and Materials, Vol. 695, pp 757-760, 2015 (Publisher: Trans Tech Publications. Indexing: Scopus. ISSN: 1660-9336)

M. A. Salim, **A. Putra**, M. R. Mansor, M. T. Musthafah, M. Z. Akop, M. A. Abdullah, Analysis of Parameters Assessment on Laminated Rubber-Metal Spring for Structural Vibration, IOP Conference Series: Materials Science and Engineering, Vol. 114(1). Indexing: Scopus

M. A. Salim, **A. Putra**, M. A. Abdullah, Modeling of Mullins Effect on Laminated Rubber-Metal Spring, Proceedings of Mechanical Engineering Research Day 2015, Melaka, Malaysia, pp. 331-335. Indexing: WoS

N. F. Saari, **A. Putra**, H. Bakri, R. Md. Dan, Variability of vibration input power to a beam structure, Proceedings of Mechanical Engineering Research Day 2015, Melaka, Malaysia, pp. 107-108. Indexing: WoS

D. Hafizah, **A. Putra**, M. J. M. Noor, M. S. Py, Double layered micro-perforated panel as acoustic absorber in mosque, Proceedings of Mechanical Engineering Research Day 2015, Melaka, Malaysia, pp. 103-104. Indexing: WoS

S. Susilo, **A. Putra**, K. S. Leong, M. J. M. Nor, On the dynamics of a beam-SDOF energy harvester system, Proceedings of Mechanical Engineering Research Day 2015, Melaka, Malaysia, pp. 127-128. Indexing: WoS

N. Shyafina, **A. Putra**, Z. Y. Lim, N. Muhammad, Reciprocity method in a small acoustic space to measure sound radiation from baffled perforated plates, Proceedings of Mechanical Engineering Research Day 2015, Melaka, Malaysia, pp. 101-102. Indexing: WoS

K.H. Lim, **A. Putra**, R Ramlan, Mobility of rectangular plate with constraint and unconstraint edges, Proceedings of Mechanical Engineering Research Day 2015, Melaka, Malaysia, pp. 97-98. Indexing: WoS

Y. M. Cheah, **A. Putra**, N. Muhammad, R. Ramlan, Fundamental model of structure-borne vibration transmission in buildings using the portal frame approach, Proceedings of Mechanical Engineering Research Day 2015, Melaka, Malaysia, pp. 93-94. Indexing: WoS

K. H. Or, **A. Putra**, M. Z. Selamat, Oil palm empty fruit bunch fibers as sustainable acoustic material, Proceedings of Mechanical Engineering Research Day 2015, Melaka, Malaysia, pp. 99-100. Indexing: WoS

F. A. Khair, **A. Putra**, M. J. M. Nor, N. Atiqah, Investigation on reed Imperata Cylindrica as sound absorber, Proceedings of Mechanical Engineering Research Day 2015, Melaka, Malaysia, pp. 91-92. Indexing: WoS

M. A. Salim, S. N. Jamaluddin, **A. Putra**, M. A. Abdullah, Stress level on sustainable vibration isolator using numerical method, Proceedings of Mechanical Engineering Research Day 2015, Melaka, Malaysia, pp. 37-38. Indexing: WoS

M. A. Abdullah, J. F. Jamil, **A. Putra**, M. A. Salim, Noise analysis in Malaysian passenger car cabin, Proceedings of Mechanical Engineering Research Day 2015, Melaka, Malaysia, pp. 105-106. Indexing: WoS

2014

**A. Putra**, N. Shyafina, D. J. Thompson, M. J. M Nor, , Modeling sound radiation from a baffled vibrating plate for different boundary conditions using an elementary source technique, Proceedings of the 43rd INTERNOISE 2014, Meulborne Australia, 8 pages

M. N. A. Md Rejab, R. A. Rahman, R. I. R. Hamzah, I. I. Jawaid, N. Ahmad, A. Ismail and **A. Putra**, Using transmissibility and vibration power flow methods to evaluate the effectiveness of elastomeric mounts for vibration and noise control, Proceedings of the 21st International Conference of Sound and Vibration (ICSV 21) 2014, Beijing China, 8 pages (Indexing: Scopus. ISBN: 978-616-551-682-2. ISSN: 2329-3675)

M. A. Abdullah, M. A. Salim and **A. Putra**, Linear and angular displacement relationship of natural rubber engine isolator, Applied Mechanics and Materials, Vol. 575, pp 250- 253, 2014 (Publisher: Trans Tech Publications. Indexing: Scopus. ISSN: 1660-9336)

**A. Putra**, N. Shyafina, N. Muhammad, H. Bakri and N. F. Saari, Development of Hybrid Semi-Analytical and Finite Element Analysis to Calculate Sound Radiation from Vibrating Structure, Advanced Materials Research, Vol. 845, pp. 71-75, 2014 (Publisher: Trans Tech Publications. Indexing: Scopus. ISSN: 1662-8985)

**A. Putra**, S. Norfarizan, H. Samekto and M. A. Salim, Static Analysis of a Laminated Rubber-Metal Spring Using Finite Element Method, Advanced Materials Research, Vol. 845, pp. 86-90, 2014 (Publisher: Trans Tech Publications. Indexing: Scopus. ISSN: 1662-8985)

2013

M. N. A. Rejab, R. A. Rahman, R. I. R. Hamzah, J. I. I. Hussain, N. Ahmad, A Ismail and **A. Putra**, Fabricating process and mechanical properties of elastomeric mount, Proceedings of The 7th South East Asia Technical University Consortium (SEATUC) Symposium 2013 (ISBN: 2186-7631)

**A. Putra**, D. Hafizah, M. Y. Yaakob, Y. Abdullah, N. S. Muhammad, R. Jenal and M. J. M. Nor, Assessment of the Acoustical Performance in Malacca Mosque, Malaysia: A Case Study on the Sayyidina Abu Bakar Mosque, Proceedings of the 20th International Conference of Sound and Vibration (ICSV 20) 2013, 8 pages (Indexing: Scopus. ISBN: 978-616-551-682-2. ISSN: 2329-3675)

**A. Putra**, N. Muhammad, N. Shyafina and D. J. Thompson, Radiation efficiency of a perforated panel modelled using elementary source technique, Proceedings of the 20th International Conference of Sound and Vibration (ICSV 20) 2013, 8 pages (Indexing: Scopus. ISBN: 978-616-551-682-2. ISSN: 2329-3675)

2012

A. Y. Ismail, **A. Putra** and M. R. Ayob, Insertion of a micro-perforated panel to im- prove sound transmission loss of a double-leaf partition, Proceedings of International Conference on Engineering and ICT (ICEI) 2012, Vol. 1, pp.111-115 (ISBN:978-967-0257-12-9)

M. S. Py, **A. Putra** and N. Salleh and H. Efendy, Modelling the effect of vibration on the sound absorption performance of green sound absorber using wave propagation technique, Proceedings of International Conference on Engineering and ICT (ICEI) 2012, Vol. 1, pp.313-316 (ISBN:978-967-0257-12-9)

N. Fariza, **A. Putra**, H. Bakri and R. Ramlan, Characterization of a structure-borne source using the reception plate method, Proceedings of International Conference on Engineering and ICT (ICEI) 2012, Vol. 1, pp.348-352 (ISBN:978-967-0257-12-9)

Y. Abdullah, **A. Putra**, H. Efendy, W. M. Farid and M. R. Ayob, The effect of binder on the acoustical performance of paddy straw ’green’ sound absorber, Proceedings of International Conference on Engineering and ICT (ICEI) 2012, Vol. 2, pp.355-358 (ISBN:978-967-0257-12-9)

W. C. Mun, **A. Putra** and A. Rivai, Analysis of vibration level of perforated panel using finite element method, Proceedings of International Conference on Engineering and ICT (ICEI) 2012, Vol. 2, pp.442-446 (ISBN:978-967-0257-12-9)

2011

M. Fadzil, **A. Putra** and R. Ramlan, Determination of vibration strength of a small structure-borne source using a high mobility reception plate, Proceedings of Hari Penye- lidikan Fakulti Kejuruteraan Mekanikal UTeM 2011, pp.34-39 (ISBN: 978-967-0257-03-7)

C. D. Juis and **A. Putra**, On a simple technique to measure the airborne noise in a motor vehicle using source substitution , Proceedings of Hari Penyelidikan Fakulti Kejuruteraan Mekanikal UTeM 2011, pp.40-45 (ISBN: 978-967-0257-03-7)

A. Y. Ismail, **A. Putra** and M. R. Ayob, Application of micro-perforated panel (MPP) in a vehicle cabin: Overcoming the ’mass-air-mass’ resonance, Proceedings of Hari Penyelidikan Fakulti Kejuruteraan Mekanikal UTeM 2011, pp.46-51 (ISBN: 978-967-0257-03-7)

Y. Abdullah, **A. Putra**, H. Efendy, W. M. Farid and M. R. Ayob, Dried paddy straw fibers as an acoustic absorber: A preliminary study, Proceedings of Hari Penyelidikan Fakulti Kejuruteraan Mekanikal UTeM 2011, pp.52-56 (ISBN: 978-967-0257-03-7)

A. Y. Ismail, **A. Putra** and M. R. Ayob, Sound transmission loss of a solid- microperforated double-leaf partition under normal incidence of acoustic loading, Proceeding of International Conference on Mechanical, Automotive and Aerospace Engi- neering (ICMAAE) 2011, Kuala Lumpur, Malaysia (ISBN:978-967-10455-0-3)

Y. Abdullah, **A. Putra**, H. Efendy, W. M. Farid and M. R. Ayob, Investigation on natural waste fibres from dried paddy straw as a sustainable acoustic absorber, Proceeding of IEEE First Conference on Clean Energy and Technology (CET) 2011, pp. 311-314 (Indexing: Scopus. ISBN: 978-1-4577-1353-8. IEEE Xplore Digital Library. doi: 10.1109/CET.2011.6041482).

A. Y. Ismail, **A. Putra** and M. R. Ayob, Employing the micro-perforated panel (MPP) in the vehicle cabin: Is this possible?, Proceedings of Malaysian Technical Universities International Conference on Engineering and Technology (MUiCET) 2011, pp.674-679 (ISBN:978-967-5457-85-2)

M. A. M. Irwan, M. M. Syahrail, **A. Putra**, A. M. Fudhail, M. Z. M. Rody, R. Nadlene, S. M. Adrinata and M. N. M. Rashid, Experimental investigation on the effect of liquid fill level in a container to liquid sloshing, Proceedings of Malaysian Technical Universities International Conference on Engineering and Technology (MUiCET) 2011, pp.790-793 (ISBN:978-967-5457-85-2)

2010

**A. Putra** and B. R. Mace, The contribution of moment excitation on the uncertainty in the vibration input power to a structure, Proceeding of 3rd Regional Conference on Noise, Vibration and Comfort (NVC) 2010, Putra Jaya, Malaysia (ISBN:978-983-2982-34-0)

2009

**A. Putra** and B. R. Mace, The effect uncertainty in the excitation on the input power to a structure, Proceeding of Noise and Vibration: Emerging Methods (NOVEM) 2009, Oxford, United Kingdom

2007

**A. Putra** and D. J. Thompson, The radiation efficiency of perforated unbaffled and baffled plates, Proceeding of the 19th International Congress on Acoustics (ICA) 2007, Madrid, Spain

2006

**A. Putra** and D. J. Thompson, The radiation efficiency of point-excited rectangular baffled and unbaffled plates, Proceeding of the Institute of Acoustics, Vol. 28, Pt. 1, 2006, Southampton, United Kingdom