BNO Acoustics QS-4: Sound Absorption

Same as Acoustical Absorption (the action or quality of a surface or substance to absorb sound rather than reflect it).

Peak Indicating Meter
A meter which reads the absolute peak level of the waveform.

Active Crossover
Uses active devices (transistors, IC's, tubes) and some form of power supply to operate.

BNO Acoustics GK-3: Bass Roll Off
An electrical network built into some microphones to reduce the amount of output at bass frequencies when close-micing.

Compact Disc, Read Only Memory CDROM
A Compact Disc used to store digital data, such as large programs, that can be read by a computer.

Frequency
Practically speaking, high frequency means high pitch and low frequency means low pitch.

TT
A trademark of Switchcraft and meaning Tiny Telephone Jack/Plug (A smaller version of the phone jack/plug).