The units dB SPL,dB SL,and dB HL can all be interchangeably used.

Question

Quizplus · Accepted Answer

dB SPL (sound pressure level) measures the intensity of sound relative to a reference value in air. dB SL (sensation level) measures the intensity of sound relative to an individual's hearing threshold at a specific frequency. dB HL (hearing level) is the same as dB SL but the reference value is the average threshold for normal hearing at different frequencies. Therefore, the units cannot be used interchangeably.

The Units DB SPL,dB SL,and DB HL Can All Be