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A weighting vs C weighting vs Z weighting | sound meter

This page compares A weighting vs C weighting vs Z weighting used in sound meter and mentions basics of A weighting, C weighting and Z weighting with respect to sound level meters.

These weighting types are associated with sound level meters (SLMs). This will help in selecting right SLM based on their sound behaviour over frequency range. Human ear has capabilities to react for frequencies between 500 Hz to 8 KHz. It is not much sensitive to very low and high pitch noises.
Refer basics and types of sound level meters➤.

A Weighting frequency response

This type of weighting is expressed in dBA. This meter provides more weight to specific frequencies over others. Here sound levels are attenuated or amplified at certain frequency points in order to match with response of human ear. A weighting frequency response is mandated by international standard.

C Weighting frequency response

This type of weighting is expressed in dBC. In this type, all the frequency points are considered to be same. No amplification or attenuation is applied to the sound levels. C Weighting is optional requirement.

Z Weighting frequency response

This type of weighting is expressed in dBZ. This type has flat frequency response. It is about +/-1.5dB over 10 Hz to 20 KHz. Z Weighting is optional requirement.



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