Physics:Sound unit
From HandWiki
A sound unit is any acoustic unit of sound measurement.
- dB, decibel - noise of sound measurement is called decibels (dB). Ratio of the sound pressure to reference pressure to something.
- sone - a unit of perceived loudness equal to the loudness of a 1000-hertz tone at 40 dB above threshold, starting with 1 sone.
- phon - a unit of subjective loudness.
- Hz, hertz = unit of sound frequency is called hertz (Hz)
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