Question

13 The frequency of audible sound is__________________.​

Answer 1

Answer:

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Explanation:

Humans can detect sounds in a frequency range from about 20 Hz to 20 kHz. (Human infants can actually hear frequencies slightly higher than 20 kHz, but lose some high-frequency sensitivity as they mature; the upper limit in average adults is often closer to 15–17 kHz.)

Answer 2

Answer:

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