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sound pressure level

   Also found in: Dictionary/thesaurus, Acronyms, Wikipedia 0.03 sec.
sound pressure level [′sau̇nd ¦presh·ər ‚lev·əl]
(acoustics)
A value in decibels equal to 20 times the logarithm to the base 10 of the ratio of the pressure of the sound under consideration to a reference pressure; reference pressures in common use are 0.0002 microbar and 1 microbar. Abbreviated SPL.


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Given the same sound pressure level of 70 dB at the listener's ears, the following figure illustrates the difference in sound pressure distribution between typical multi-channel sound reproduction and Near Speaker Surround sound.
It has been demonstrated that significant decreases in sound pressure level occur when signals are presented from the poorer-heating side of the skull.
Reduces sound pressure levels created during the cutting and evacuating of film, foil and paper as well as other material
 
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