Question

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Answer 1

Answer:

1. sorry idk

2. The SI unit of frequency is hertz.

3. High frequency means shriller sound and higher pitch.

4. Sound in human is produced by the voice box or larynx.

5. Loudness of sound is expressed in decibel (dB).

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Answer 2

1 Hertz (Hz)

2 Hertz (Hz)

3 shriller , higher

4 larynx

5 decibels (dB)