sone
Množina: sones
A unit of perceived loudness equal to the loudness of a 1000-hertz tone at 40 dB above threshold.
unit of loudness on a scale based on subjective or perceived loudness
Unit of subjective loudness. A tone of 40 decibels above the threshold of hearing with a frequency of 1,000 hertz is defined as one sone; any sound that seems twice as loud as this has a value of two sones, and so on. A loudness of one sone corresponds to 40 phons.
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