Other Definitions
subsonic (dict)

Subsonic

• A speed lower than the speed of sound is called subsonic.

• Sounds that are too low-pitched to be consciously perceived by humans are called infrasound or subsonic. Subsonic sound has an effect on human hearing. The frequency range of normal human hearing is 20-24,000 hertz. Researchers have found that frequences as low as one hertz (one cycle per second) have a definite effect on the inner ear, affecting its equilibrium and causing dizziness. Infrasonic sound waves in nature are produced only by earthquakes.

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