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Working with Audio by Stanley R. Alten

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Chapter 1. Behavior of Sound

What is sound? The answer depends on who you ask. A physicist will tell you that sound is both a disturbance of molecules caused by vibrations transmitted through an elastic medium (such as air) and the interaction of these vibrations within an environment. This definition does not mean much to the psychologist, who thinks of sound as a human response.

To put the question another way: If a tree falls in a forest and there is no one to hear it, does the falling tree make a sound? The physicist would say yes because a falling tree causes vibrations, and sound is vibration. The psychologist would probably say no because, without a perceived sensation, there can be no human response; hence, there is no sound. In practical ...

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