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IEVref:801-29-14ID:
Language:enStatus: Standard
Term: tone-corrected perceived noise level
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Definition: a sound pressure level in decibels, obtained by adding to perceived noise level an adjustment that is related to the degree of irregularity that may occur among contiguous one-third-octave band sound pressure levels of an aircraft noise

NOTE 1 – The adjustment is described in ISO 3891-1978 ; it may vary from 0 dB to 6,7 dB.

NOTE 2 – The adjustment purports to account for the extra subjective noisiness caused by pronounced audible tones such as may be generated by propellors, compressors, turbines or fans.


Publication date:1994-07
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Internal notes:2017-05-31: Decimal point corrected to decimal comma. JGO
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