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Science > Acoustics

anechoic chamber

Science; Acoustics

Echo free room, within specified limits walls lined with sound absorbent wedges to minimize reflections and create free-field conditions, so direct sound measurements of test ...

averaging

Science; Acoustics

Ensemble l exponential l linear l RMS l spatial l spectrum l time domain l time weightings

excitation

Science; Acoustics

External force, or other input, applied to a system.

weighting window

Science; Acoustics

Fast Fourier transform theory tells us that time and frequency are simply two alternative ways of observing a signal. By changing the nature of a signal in the time domain, we ...

wavelength (λ)

Science; Acoustics

For a sound wave is 345 m/s (Speed of sound) divided by the frequency - the unit is meters. Wavelength is also defined as the distance between repeating units of a sound wave. 20 ...

diffraction factor

Science; Acoustics

For a specified frequency and a specified direction of sound incidence, ratio of the sound pressure acting on the part of a transducer designed to receive sound, to the free-field ...