Brooks M 44 Audio

Most often referring to electrical signals resulting from the sound pressure wave being converted into electrical energy.

Hertz
The unit of frequency. Equivalent to cycles per second. Abbreviation: Hz.

Brooks KM 77 Input Monitor
A switch position and operational mode of the electronics of a tape machine where the signal at output of the electronics will be the same as the signal coming into the electronics. In this mode, the tape machine's meter will read the input signal.

Horn
1) The part of the speaker that emits midrange and higher range frequencies.
2) A speaker or speaker enclosure where sound waves are put into a narrow opening (by a speaker cone or driver) and the narrow opening flairs out to a larger opening.

Brooks KS-55 Hz (Hertz)
1) An abbreviation for the term Hertz (the unit of frequency).
2) Unit of frequency equivalent to the number of cycles per second.

Bridge
The bridge assembly, or just "bridge" is an area on the face of the guitar where the string meet or are connected to the face.

Far Field
The area from 3 feet away from the sound source up to the critical distance.

Linear
The condition of obtaining a change at the output of the device which is proportional to the change occurring at the input.