It is possible to recognise 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 capacity

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has definite quality

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has definite pitch

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can penetrate the wall

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Solution

The correct option is B has definite quality
Each sound has a definite quality , due to this fact a person can be recognized without seeing him.

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Similar questions

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

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