Glossary

Abffusor: A proprietary panel offering both absorption and diffusion of sound.
absorption: In acoustics, the changing of sound energy to heat.
absorption coefficient: The fraction of sound energy that is absorbed at any surface. It has a value between 0 and 1 and varies with the frequency and angle of incidence of the sound.
acoustics: The science of sound. It can also refer to the effect a given environment has on sound.
AES: Audio Engineering Society.
algorithm: Procedure for solving a mathematical problem.
ambience: The distinctive acoustical characteristics of a given space.
amplifier, line: An amplifier designed to operate at intermediate levels. Its output is usually on the order of one volt.
amplifier, output: A power amplifier designed to drive a loudspeaker or other load.
amplitude: The instantaneous magnitude of an oscillating quantity such as sound pressure. The peak amplitude is the maximum value.
amplitude distortion: A distortion of the wave shape of a signal.
analog: An electrical signal whose frequency and level vary continuously in direct relationship to the original electrical or acoustical signal.
anechoic: Without echo.
anechoic chamber: A room designed to suppress internal sound reflections. Used for acoustical measurements.
articulation: A quantitative measure of the intelligibility of speech; the percentage of speech items correctly perceived and recorded.
artificial reverberation: Reverberation generated by electrical or acoustical means to simulate that of concert halls, etc., added to a signal to make it...

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