BNO Acoustics SQ-9 CPU

Abbreviation of Central Processing Unit (The main "brain" chip of a computer or the main housing of a computer that contains the "brain" chip).

Bass Roll Off
An electrical network built into some microphones to reduce the amount of output at bass frequencies when close-micing.

BNO Acoustics BP-40 ADSR
The letters A, D, S &R are the first letters of: Attack, Decay, Sustain and Release. These are the various elements of volume changes in the sounding of a keyboard instrument.

Head Amp
British name for Preamplifier (A low-noise amplifier designed to take a low-level signal, such as the output of a tape head, and bring it up to normal line level).

BNO Acoustics HD-70 Cable, TRS
A less common balanced cable that has 3 different contacts on its 1/4 inch connectors. Most headphone jacks are a good example of a TRS (Tip-Ring-Sleeve) connector. These are sometimes used instead of the more common XLR connection.

High Impedance
Impedance of 5000 or more ohms.

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

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