BNO Speakers: Surround Sound

A technique of recording and playback of sound used in film where the sound has a front to back quality as well as side to side perspective.

Wave Velocity
The time it takes for one point of the waveform to travel a certain distance.

Sync Level (Sync Gain)
A control on a multitrack tape recorder to adjust the reproduce level when the machine is in the sync playback mode (using the record head as a reproduce head for tracks already recorded).

Y-Cord
A cable with three connectors so that one output may be sent to two inputs.

BNO Acoustics LK-61: Non-Linear
The condition of obtaining a change at the output of the device which is not proportional to the change occurring at the input, causing distortion.

BNO Acoustics HD-70: Reference Tones
A term with the same meaning as the term Test Tones (a recording of several single-frequency tones at the beginning of a tape reel at the magnetic reference level that will be used to record the program).

Coincident Microphones (Coincident Pair)
Two microphones whose heads are placed as lose as possible to each other so that the path length from any sound source to either microphone is for all practical purposes, the same.