what is sound who it is produce

1.	what is sound who it is produce
Answer» <p>In physics, sound is a vibration that typically propagates as an audible wave of pressure, through a transmission medium such as a gas, liquid or solid. In human physiology and psychology, sound is the reception of such waves and their perception by the brain.</p> <p>It turns out that air is able to support not just one wave, but many different waves simultaneously. This means various pure tones can be mixed, and sent through the air at the same time. This is where music, speech, and other “noise” come from.When we draw a sound wave, the wave peaks and valleys are close together or far apart. Sound waves vibrate at different rates or “frequencies” as they move through the air. Frequency is measured in cycles per second, or Hertz, after the German physicist who experimented with sound in the 19th century. The faster an object vibrates, i.e. the higher the frequency, then the higher the pitch of the sound. For example, a tuning fork for A above middle C will vibrate 440 times per second and has a frequency of 440 Hertz.</p>

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