BNO Acoustics TR-12: On Axis

The position of directly in front of the diaphragm of a microphone, in line with its movement.

Short (Short Circuit)
A direct connection between two points in a circuit that (usually) should not be connected.

Variable-D
A patented invention (and trademark) of Electrovoice where several port are put down the case of the microphone. The ports are less and less sensitive to high frequencies as they are further away from the diaphragm, reducing proximity effect.

Efficiency
The acoustic power delivered for a given electrical input. Often expressed as decibels/watt/meter (dB/w/m). ESL � Abbreviation for electrostatic loudspeaker.

Serial Port
A jack that sends out or receives digital data one bit after another, through a single pin.

BNO Acoustics QT-5: Haas Effect
Simply stated, a factor in human hearing where delay has a much bigger effect on human perception of direction than level does.

Phone Plug (Jack)
A plug (or its mating jack) with a diameter of 1/4 inch and a length of I 1/4 inches used for interconnecting audio.