Sound level meter
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A sound level meter is used for acoustic measurements. It is commonly a hand-held instrument with a microphone. The best type of microphone for sound level meters is the condenser microphone, which co
An integrating-averaging Cirrus Research's Optimus sound level meter which complies with IEC 61672-1:2002
A, C and Z frequency weightings for sound
Graph of LAeq sound level measurement calculated over 5 minutes
Graph of a continuous LAeq sound level measurement
Noise dosimeter
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A noise dosimeter or noise dosemeter is a specialized sound level meter intended specifically to measure the noise exposure of a person integrated over a period of time. It is often used to comply wit
Sound level meter
…in terms of sound exposure level (SEL), the logarithmic conversion of sound exposure into decibels. A common variant of the sound level meter is a noise dosemeter (dosimeter in American English). However, this is now formally known as a personal sound exposure meter (PSEM) and has its own international standard…
Personal noise dosimeters
Worker wearing a personal noise dosimeter