loudness level


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Related to loudness level: equal loudness contour

loudness level

[′lau̇d·nəs ‚lev·əl]
(acoustics)
The level of a sound, in phons, equal to the sound pressure level in decibels, relative to 0.0002 microbar, of a pure 1000-hertz tone that is judged to be equally loud by listeners.

loudness level

Of a sound, the sound-pressure level of an equally loud 1,000-Hz pure tone, expressed in units called phons.
References in periodicals archive ?
NIHL can be caused by a one-time exposure to loud sound as well as by repeated exposure to sounds at various loudness levels over an extended period of time.
A total of 352 half-hour periods (22 days) were included in the analysis of the effect of loudness levels on dispensing error rates.
They automatically provide continuously variable amplification for the different intensities (loudness levels) of speech based on a persons sensitivity to loudness of both high (treble) and low (bass) frequency sounds.
Automatic loudness control (ALC) prevents excessive jumps in programmeto-programme and channel-to-channel loudness levels. Available for multiple Densite interfaces, it is designed to address all typical loudness problems, including audio-level changes between programmes and commercials, without adversely impacting the programme content.
* Patients underwent audiologic evaluations, including tympanometry and measurements of pure-tone air and bone conduction thresholds, speech perception in quiet and noise, and most comfortable and uncomfortable loudness levels.