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Calculates how much the sound is attenuated by the sound attenuation measure.


Frequency Sum
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Note that it uses the same audio filter for all components of the calculation is the most common and widely used variant is the dB (A).


In this series fills in the audio data for the respective frequency range before the noise-reducing measure.


This fills in the sound-absorbing acoustic data for the respective frequency range.


This shows how the audio data is after the sound deadening measures for each frequency.


Displays the weighted sum of the input frequencies for resperktive row.

The decibel (dB)

is a logarithmic measure that indicates a relation to a reference value. Commonly used in sound determinations, but also occur in other areas. The basic unit is actually Bel but used almost exclusively with the prefix deci ie 10.1 Bel.


Refers to the unfiltered sound also called because the sound which it assumes when you then put the filter on top to mimic the ear.


A-weighting filter is the most commonly used, and is applicable for normal frequencies and ljustyrkor. A-weighting attenuates the low frequencies and amplifies the medium, A-weighted filter is primarily intended to be used in the measurement of the level sounds


B-weighted filter is supposed to handle the between loud sounds but these B-weighted filter is used rarely lower.


C-weighted filter is for the loudest sounds sound filter with a C-weighting is used mainly for sound with strong and low frequencies such as fan noise but is also used for short, sharp beeps mean when the C-weighted filters do not suppress the low frequencies in contrast to the A-weighted filter.


Sound summation:: Sound summation: