noise immission level

noise immission level

[¦nȯiz i¦mish·ən ‚lev·əl]
(acoustics)
A measure of the cumulative noise energy to which an individual is exposed over time; equal to the average noise level to which the person has been exposed, in decibels, plus 10 times the logarithm of the number of years for which the individual is exposed.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
References in periodicals archive ?
Additionally, the students' exposures were described by a noise immission level ([L.sub.IM]), i.e., a measure of the cumulative sound (noise) energy to which an individual was exposed over time given by the formula (2):
In particular, HTLs at 4000 Hz and 6000 Hz were positively correlated with the A-weighted equivalent-continuous SPL during solo playing, while at 3000 Hz with noise immission level.
The weekly noise exposure levels calculated from those data ranged between 75-106 dB (M [+ or -] SD = 86.8 [+ or -] 6.3 dB, Me = 84.9 dB) (Figure 3), while the corresponding noise immission levels varied from 85 dB to 114 dB (M [+ or -] SD = 94.4 [+ or -] 6.2 dB, Me = 92.6 dB).