Acoustics

Acoustics

Of or pertaining to the study of mechanical waves in all stages of matter including sounds, vibration, ultrasounds, and infrasound.

Industry: Physics; Science

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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.

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. Sometimes written as Max ...

band sound pressure level

Science; Acoustics

Level of the sound pressure produced within a specified frequency band.

logarithmic frequency interval

Science; Acoustics

Logarithm of the ratio of two frequencies -

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 time.