perceived noisiness

11.14  perceived noisiness; noisiness. Prescribed function of sound pressure levels in the 24 one-third octave bands with nominal mid-band frequencies from 50 Hz to 10 kHz that is used in the calculation of perceived noise level. Unit, noy; abbreviation, n.

Annotation              The prescribed function is given in International Civil Aviation Organization, ICAO 9501, Environmental Technical Manual on the Use of Procedures in the Noise Certification of Aircraft, Third Edition, 2004.