Sound

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1. The maximun to which a vibrating body moves on either side of its mean position is called the amplitude of vibration.

2. For human ears the range of audible frequencies is roughly from .

3. is the thin membrane which is streched tightly to receive the waves of sound at the end of ear canal.

4. The frequency is expressed in .

5. The sound is produced by in humans.

6. Larger the , louder is the sound.

7. Unpleasant sounds are called .