Acoustics

Acoustics

Of or pertaining to the study of mechanical waves in all stages of matter including sounds, vibration, ultrasounds, and infrasound.

Industry: Physics; Science

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Acoustics

Acoustic ohm is a unit of measurement of sound resistance, and is the ratio of the acoustic pressure pa to acoustic volume flow m 3 /s = Pa s/m 3 . These units got their name by analogy with electric ...

rapid speech transmission index (RASTI)

Science; Acoustics

Rapid speech transmission index is an objective way of measuring speech intelligibility. It is measured by placing a loudspeaker, which transmits sound from the location of the person speaking, and a ...

isotropic

Science; Acoustics

The term isotropic is derived from isotropy i.e. uniform in all directions. In acoustics it is sometimes used to describe noise sources like loudspeakers arrange in a dodecahedron format to give ...

early decay time (EDT)

Science; Acoustics

Early decay time is derived from the reverberation time decay curve - the section between 0 dB and 10 dB below the initial level. As it relates to the initial and highest level part of the decaying ...

angular displacement (θ)

Science; Acoustics

Angular displacement is measured in radians rather than degrees. This is because it provides a very simple relationship between distance travelled around the circle and the distance r from the ...

digital signal processing (DSP)

Science; Acoustics

Digital signal processing is the analysis of digital signal data. The original analogue signal is sampled at regular time intervals, and an analogue to digital converter converts the sampled ...

predicted noise level reduction (PNR)

Science; Acoustics

Predicted noise level reduction is the calculated noise level reduction at the ear when using ear protectors, based on the manufacturers' HML figures and the measured noise levels at the operators ...