Brooks Cinema XR 607 Full Range

Describes a sound which covers all audible frequency ranges. As in "full range speaker cabinets."

Hi-Z
An abbreviation of the term High Impedance (Impedance of 5000 or more ohms).

Brooks TA 60 Equal Loudness Contours
A drawing of several curves showing how loud the tones of different frequencies would have to be played for a person to say they were of equal loudness.

Diaphragm
A thin flexible membrane or cone that vibrates in response to electrical signals to produce sound waves. Distortion is usually referred to in terms of total harmonic distortion (THD) which is the percentage of unwanted harmonics of the drive signal present with the wanted signal. Generally used to mean any unwanted change introduced by the device under question.

Brooks Cinema ZL 44 Line Out (Line Output)
Any output that sends out a line level signal, such as the output of a console that feeds a recorder.

Close Micing
A technique of placing a microphone close to the sound source (within one foot) in order to pick up mainly the direct sound and to avoid picking up leakage or ambience.

Level
Sets output volume of individual PA input channels. Usually positioned as sliders at the bottom of the soundboard.

Boundary Mic
A microphone mounted on a flat plate that acts as a reflective surface directing sound into the mic capsule. Used for general pick-up over a large area. See PCC, PZM.