the frequency of subsonic sound is a)more than 20Hz. b)100Hz. c)less than 20 Hz.
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3
Answer:
20HZ.
Explanation:
Hearing becomes gradually less sensitive as frequency decreases, so for humans to perceive infrasound, the sound pressure must be sufficiently high. The ear is the primary organ for sensing infrasound, but at higher intensities it is possible to feel infrasound vibrations in various parts of the body.
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1
Answer: Letter C.
Explanation:
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