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Definition of Sound pressure level
1. Noun. The physical intensity of sound. 
Medical Definition of Sound pressure level
1. A measure of sound energy relative to 0.0002 dynes/cm2, expressed in decibels. (05 Mar 2000)
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1. Noun. The physical intensity of sound. 
1. A measure of sound energy relative to 0.0002 dynes/cm2, expressed in decibels. (05 Mar 2000)