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B-weighting
l Represents the human ear’s response at medium sound levels
l Corresponding equal loudness curve: 70dB
C-weighting
l Represents the human ear’s response at fairly high sound levels
l Corresponding equal loudness curve: 100dB
l Mainly used when assessing peak values of high sound pressure levels (LCpeak)
Z-weighting
l Without any frequency weighting
✐ Note: An equal loudness curve is a frequency response curve. Equal loudness curves are the experimental results
of presenting pure tones and levels at different frequencies to young people with no hearing impairment. Along a con-
tour line the young, average, normal listener will judge tones presented with different combinations of frequency and
dB to be equally loud.
Table of Parameters
This table gives an overview of all the possible parameter / frequency weighting combinations.
✐ Note: The parameters are listed as they appear in the Broadband parameters menu.
A C Z B
Leq LAeq LCeq LZeq LBeq
Lpeak LApeak LCpeak LZpeak LBpeak
LFmax LAFmax LCFmax LZFmax LBFmax
LSmax LASmax LCSmax LZSmax LBSmax
LFmin LAFmin LCFmin LZFmin LBFmin
LSmin LASmin LCSmin LZSmin LBSmin
LFTeq LAFTeq
LIeq LAIeq
LImax LAImax
LE LAE LCE LZE LBE
LF LAF LCF LZF LBF
Set up the Instrument: Measurement Parameters
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