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Science > Acoustics 
night equivalent level (Lnight)
Science; Acoustics
Leq. A-weighted, sound level, measured overnight 23.00 - 0700 hours. Also known as the night noise indicator and other terms.
maximum sound level (Lmax)
Science; Acoustics
Level during a measurement period or a noise event. Do not confuse with peak. Should also include other descriptors i.e. A, C, L or Z weightings and F, S or I time constants. ...
band sound pressure level
Science; Acoustics
Level of the sound pressure produced within a specified frequency band.
noise induced hearing loss (NIHL)
Science; Acoustics
May be caused by a one-time exposure to an intense impulse sound, such as an explosion, or by continuous exposure to noise levels greater than 80 dBA over an extended period of ...
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