Recent Developments in Acoustics

1. Acoustic Noise and Vibration

   1. Experimental Studies on Twelve Bladed Fan Vibration Considering Flexibility of Shaft

      • Shashank Shekhar Singh, Ahmad Ali Khan

      Pages 185-192

   2. Dynamic Analysis for Healthy and Defective Gears: A Review

      • Swati Gautam, Sidra Khanam, N. Tandon

      Pages 193-205

   3. Non-Cavitating Noise Control of a Marine Propeller by Optimizing Number and Pitch of Blades

      • V. Ramakrishna, P. Bangaru Babu, Ch. Suryanarayana

      Pages 207-217

   4. Noise Control of a Marine Propeller by Modifying the Skew Angle

      • V. Ramakrishna, D. A. Rao, Ch. Sankara Rao, P. V. S. Ganesh Kumar, T. Gunasekhar, V. Mani kumar

      Pages 219-229

   5. Acoustic Signature of Square Cylinder in a Compressible Flow

      • Mohd Masoom Ali, Syed Fahad Anwer

      Pages 231-240

2. Instrumentation and Signal Processing

   1. Front Matter

      Pages 243-243

      PDF

   2. Direction of Arrival Estimation for Speech Source Using Closely Spaced Microphones

      • Mohd Wajid, Arun Kumar, Rajendar Bahl

      Pages 243-250

   3. Investigations into Some Parameters of Vibration Signal of Faulty Bearings with Wavelet Transform

      • Sidra Khanam, N. Tandon

      Pages 251-262

   4. Standard Practices for Acoustic Emission Measurement on Rotating Machinery

      • Surojit Poddar, N. Tandon

      Pages 263-274

   5. Acoustic Analysis of Timbre of Sarasvati Veena in Comparison to Simple Sonometer

      • Chandrashekhar Chauhan, P. M. Singru, Radhika Vathsan

      Pages 275-284

   6. A Simultaneous EEG and EMG Study to Quantify Emotions from Hindustani Classical Music

      • Uddalok Sarkar, Soumyadeep Pal, Sayan Nag, Shankha Sanyal, Archi Banerjee, Ranjan Sengupta et al.

      Pages 285-299

   7. Studies Different Structure of Atmospheric Boundary Layer Using Monostatic SODAR

      • Nishant Kumar, Kirti Soni, Ravinder Agarwal, Mahavir Singh

      Pages 301-309

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.

• Aero and hydro-acoustics
• Bioacoustics
• Building and environmental acoustics
• Musical acoustics
• Physical acoustics
• Underwater acoustics and ultrasonics
• Sound perception
• Transducers and electro-acoustics
• Vibro-acoustics and noise
• NSA 2017

• Department of Physico-Mechanical Metrology, CSIR-National Physical Laboratory, New Delhi, India

  Mahavir Singh

• Mechanical Engineering Department, Aligarh Muslim University, Aligarh, India

  Yasser Rafat

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 received his B. Tech. in Mechanical Engineering from the Aligarh Muslim University, India. For further studies, he moved to Canada where he pursued his M. Tech. from Concordia University and his Ph.D from McGill University. Dr. Rafat has authored several publications and delivered talks in the area of thermofluids and thermoacoustics. He has served as a reviewer for POMA (Acoustical Society of America). He has also filed and published three patents in the area of charging infrastructure of xEVs and cloud based health management system. His research interests include thermoacoustic refrigerators and engines, building acoustics, ride vibration analysis, sports projectile aerodynamics, and heat management of Li-ion batteries. He is a life member of the Acoustical Society of India (ASI). 

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