Instruction manual

Casella CEL-35X dBadge Users Handbook – Page 35
10 APPENDIX
10.1 Glossary of Terms
This Appendix gives a glossary of the acoustic terminology used in
this handbook and in the CEL-35X dBadge and Casella insight data
management software. For further information, please contact Casella
CEL or your local representative.
A-Weighting
A standard weighting of the audible frequencies designed to
approximate the response of the human ear to noise.
Acoustic Calibrator
An instrument that provides a reference noise source with a standard
level and frequency used to calibrate and check the performance of
sound level meters and noise dosimeters.
ANSI S1.25 - 1991
The U.S. Standard for Noise Dosimeters.
C-Weighting
A standard weighting of the audible frequencies. In the dBadge
system it is used for the measurement of peak sound pressure level.
Criterion Level (CL)
This is the normalised eight hour average weighted sound level in dB
that corresponds to the maximum permitted daily exposure or 100%
noise dose.
Criterion Time (CT)
This is the time, in hours, used in the calculation of the %Dose.
dB(A)
A-weighted sound level in decibels.
dB(C)
C-weighted sound level in decibels.
dB(Z)
Z-weighted sound level in decibels.