B

Background Sound Level
The generally lowest or residual sound level present in a space above which speech, music or other sounds may be heard.

Bandwidth
The frequency range of a device.

Bass Ratio
The ratio of the low-frequency (125 & 250 Hz) to mid-freqency (500 & 1,000 Hz) reverberation times

Boomy
Slang expression for excessive bass response

Broadband noise or spectrum
A sound whose sound pressure level plot encompasses most of the audible frequency range has no dominant peaks.