[Asterisk-Users] Zap (analog line) and volume

[David Brodbeck]

> -----Original Message-----
> From: Rich Adamson [mailto:radamson at routers.com]

> 3.0db of gain is roughly equal to doubling the volume to the 
> human ear.

Actually, that's not true.  Each increase of 3.0 dB doubles the *power*.
But the human ear's response is logarithmic, and the decibel scale is also
logarithmic to reflect that.  1 dB is the smallest change in volume most
people can perceive.