Overview

This book deals with the phase properties in the context such as sound fields in rooms from a perspective of transfer functions for sound paths. Phase analysis, i.e., investigations of zeros of transfer functions, is a qualitative or system theoretic approach to sound fields rather than the wave-theoretic power spectral analysis. The examination of phase responses offers new insights into sound fields and yields results that the standard power spectral analysis cannot provide.   This book presents experimental data and numerical examples based on the mathematical formulations. It shows the mathematical formulations of acoustics and communication systems for engineers and physicists to get familiar with the basics of science.   Chapters 1–5 provide the theoretical basis on the system theoretic approach to sound fields where Chapters 1 and 2 are introductions to discrete acoustic systems, Chapters 3–5 summarize wave equations, geometrical and random theories of room acoustics, and Chapters 6–10 develop details of transfer functions in sound.

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9783031678097

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Mikio Tohyama holds a Doctorate of Engineering from Waseda University, Tokyo, Japan. For the next 18 years beginning in 1975, Dr. Tohyama was involved in research projects in acoustics and signal processing  at the Nippon Telegraph and Telephone (NTT) Research Laboratories. He was a professor at Kogakuin University (1993-2003) and Waseda University (2003-2012) in sound and perception. Since 2012 he has operated his research consulting firm, Wave Science Study (WSS). His present interest is signatures in spatial sound and perception in the wavenumber space. Dr. Tohyama enjoys playing the piano every day.

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