Casella CEL-350 dBadge Manuel d'instructions télécharger pdf (Page 38)

Casella CEL-35X dBadge Users Handbook – Page 38

the pressure wave, which should not be confused with the highest

sound pressure level, termed Lmax.

Slow Time Weighting

A standard time weighting applied by the noise measurement

instrument.

SPL

The sound pressure level. This is the basic physical measure of noise,

and is normally expressed in dB.

Threshold

A threshold below which sound levels are excluded from calculation.

OSHA measurements use an 80 dB threshold and call for a hearing

conservation program to be implemented when the eight hour TWA

exceeds 85 dB (50% dose).

TWA

This is a parameter used in OSHA measurements. The time weighted

average is the daily personal exposure level calculated from the LAVG

and measurement duration.

Z-Weighting

Effectively this is a linear, or un-weighted measurement. In the

dBadge system it is used for the measurement of peak sound

pressure level against the OSHA standard.

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Casella CEL-350 dBadge Manuel d'instructions Page 38