It is possible to recognize a person by hearing his voice even if he is hidden behind a solid wall. This is due to the fact that his voice:

Has a definite pitch

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Has a definite quality

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Has a definite loudness

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Can penetrate the wall

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Solution

The correct option is B Has a definite quality
The quality or timbre of a sound wave is determined by its waveform. The waveforms produced by different persons are different. Even if the pitch and loudness of two waves produced by two different persons are the same, their quality will be different.

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Which characteristic of sound makes it possible to recognize a person by his voice without seeing him?

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