37 Sound Levels and Decibels S. Akishita

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Ritsumeikan University

37.1 Introduction .......................................................................... 37-1

37.2 Sound Wave Characteristics ................................................. 37-1

Velocity of Sound

37.3 Levels and Decibels ............................................................... 37-3

Sound Power Level † Sound Pressure Level † Overall

Sound Pressure Level

Summary

In this chapter, the basic characteristics of sound and sound propagation are described. Levels and decibels, which

represent the magnitude of sound waves, are defined and explained.

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