what do loudness controls do? by Eddie Runner (NU5K).
Loudness controls on sound equipment were originally designed to
compensate for the human ears loss of frequency response at low volumes.
When sound is played softly the human ear does not hear lows or
high quite as well as it does when the same sound is played loud.
Loudness controls were originally designed to compensate for this
deficiency but boosting the bass and highs a little bit but were only supposed to be used
at very low volume levels.
A few manufacturers have made equipment that have automatic
loudness controls that automatically turn the amount of loudness increase up or down when
you turn the volume control up or down, but most are just on or off.
It seems like many of the loudness controls nowadays
just act as a
bass boost. And most listeners just turn it on cause it seems to add more bass not knowing
why it was there in the first place.
An audio purist would probably NEVER be caught using the loudness