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Reference.org
Sound exposure
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<p>Sound exposure is the integral, over time, of squared <a href="/facts/Sound_pressure/MgJAcp2I">sound pressure</a>. The <a href="/facts/International_System_of_Units/S7YLglNz">SI unit</a> of sound exposure is the <a href="/facts/Pascal_(unit)/Am1To2Qm">pascal</a> squared second (Pa2·s). </p>