BNO Acoustics GK-3 Insulator

A substance such as glass, air, plastic, etc., that will (for all practical purposes) not conduct electricity.

AC
1) Abbreviation for alternating current.
2) An abbreviation of the term Alternating Current (electric current which flows back and forth in a circuit; all studio signals running through audio lines are AC).

BNO Acoustics SQ-9 Impedance
1) A term for the electrical resistance found in a/c circuits. Affects the ability of a cable to transmit low level (e.g. sound) signals over a long distance. Measured in Ohms. Speakers are rated according to power handling capabilities (Watts, W) and impedance (Ohms).
2) The total opposition offered by an electric circuit to the flow of an alternating current of a single frequency. It is a combination of resistance and reactance and is measured in ohms. Remember that a speaker's impedance changes with frequency, it is not a constant value.
3) The opposition to alternating current.

Amplitude
The extreme range of a signal. Usually measured from the average to the extreme.

BNO Acoustics Speakers Electret Mic
A condenser microphone where the capacitor plates are given a charge during manufacture which they retain, therefore requiring no external power supply.

Generating Element
The portion of the microphone that actually converts the movement of the diaphragm into electrical current or voltage changes.

Centre Frequency
The frequency of the audio signal that is boosted or attenuated most by an equalizer with a peak equalization curve.

High Impedance
Impedance of 5000 or more ohms.