Contributors in Science
Science > Acoustics 
minimum sound level (Lmin)
Science; Acoustics
The minimum noise level during a measurement period or a noise event. Should also include other descriptors i.e. A, C, L or Z weightings and F, S or I time constants. Sometimes ...
background noise
Science; Acoustics
The noise at a given location and time, measured in the absence of any alleged noise nuisance sources, also known as residual noise. We also have a separate page on background ...
spectral lines
Science; Acoustics
The number of constant bandwidth lines used in the measurement of spectra.
frequency (F)
Science; Acoustics
The number of times that a periodic function or vibration occurs or repeats itself in a specified time, often 1 second - cycles per second. It is usually measured in hertz (Hz). ...
noise reduction (NR)
Science; Acoustics
The numerical difference, in decibels, of the average sound pressure levels in two areas or rooms. A measurement of noise reduction combines the effect of the sound transmission ...
frequency response function
Science; Acoustics
The output to input relationship of a structure. Mathematically, it is the Fourier transform of the output divided by the Fourier transform of the input.
linear averaging
Science; Acoustics
The process of adding together a sequence of spectra measurements and then dividing the total by the number of samples. The result is a true arithmetic average on a sample by ...
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