This book presents the proceedings of the 46th National Symposium on Acoustics (NSA 2017). The main goal of this symposium is to discuss key opportunities and challenges in acoustics, especially as applied to engineering problems. The book covers topics ranging from hydro-acoustics, environmental acoustics, bio-acoustics to musical acoustics, electro-acoustics and sound perception. The contents of this volume will prove useful to researchers and practicing engineers working on acoustics problems.
Introduction.- Condition Monitoring.- Physical Acoustics and Ultrasonics.- Aero Acoustics.- Acoustic Materials.- Speech.- Acoustic Vibration and Noise.- Under water Acoustics.
Dr. Mahavir Singh is the Head of the Acoustics, Ultrasonics and Vibration (AUV) section of the CSIR - National Physical Laboratory, New Delhi, India. He has over 25 years of experience in acoustics and vibration . He received his Ph.D in acoustics from IIT, Delhi. His main research interests are in the field of building acoustics, noise and vibration control, calibration and testing of electro-acoustic equipment, acoustical products and devices, maintenance, up-gradation and realization of national primary standards for acoustics and vibration. Dr. Singh has published over 125 research papers in journals and conference proceedings as well as authored a book on noise control in buildings. He is a fellow of the Acoustical Society of India (ASI), Ultrasonics Society of India (USI), Metrology Society of India (MSI), the Institution of Engineers (IEI) and the International Institute of Acoustics and Vibration (IIAV-USA).
Dr. Yasser Rafat is a faculty in the Mechanical Engineering department of the Aligarh Muslim University, India. He receivl³-
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