David W. Tamkin wrote:
>The rodent wrote,
>
>| More directly useful to
>| you, doubling volume (energy) is 10dB, so a 20dB sound is twice as loud
as
>| a 10dB sound, and a 110dB sound is twice as loud as a 100dB sound.
>
>That doesn't sound right.
Speaking in the purely subjective terms of perceived volume, it is generally
observed that approximately 9 times the power equates to double the volume.
It definitely is NOT right to factor perceived volume linearly with energy.
>As to doubling the volume, that's subjective, isn't it? "Twice as loud" is
>a lot like "twice as dark" or "twice as happy."
As a rule of thumb, 10dB is very close to an average person's perception of
doubled volume.
-cb
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