sound pressure level
Decibel measurement reading
Sound pressure level is a measure of the intensity of sound waves, expressed in decibels.
It quantifies how much the air pressure fluctuates when sound passes through, relative to a reference threshold—typically the quietest sound humans can hear.
The term appears in acoustics, audio engineering, and noise regulation: The sound pressure level at the concert exceeded safe limits.
- acoustic waveMechanical vibration through matter
- decibelTenth of a bel
- calibrationAdjusting for measurement accuracy
- auditory thresholdFaintest sound perceivable
- noise controlManaging unwanted acoustic levels
white noise · psychoacoustics · tinnitus · signal-to-noise ratio · logarithmic scale · pascal · resonance · frequency response · harmonic distortion · audio mixing · public address systems · measurement · energy density · peak · noise · quiet room · amplitude · ear
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