. "11497378-n"^^ . "sound pressure"^^ . . . . . . . "111497378"^^ . "the difference between the instantaneous pressure at a point in a sound field and the average pressure at that point"@en-us . "110755423"@en-us . "0"^^ . . "sound pressure"@en-us . "0"^^ . "instantaneous sound pressure"@en-us . . . .