Svantek SV 971A User Manual

SV 971A User Manual
120
PTP
PTC result expressed in percent.
Appendix D
TWA
Time Weighted Average - average A-weighted
sound level for a nominal 8-hour workday with Time
Weighting S and Exchange Rate 5. TWA is usually
measured with A-weighting and Slow response
detector type. TWA is calculated from the measured
LAV (taking Threshold Level into account) and a
Reference time of 8 h. Mainly used in the USA for
assessing the noise exposure for a worker during a
workday.
Appendix D
ULT
Upper Limit Time - time that SPL exceeded the
“ULT Threshold Level” set during configuration.
Appendix D
PrTWA
Projected Time Weighted Average is calculated
from the measured LAV (taking THRESHOLD
LEVEL into account) and the exposure time.
Appendix D
Lc-a
Leq that enhances the low-frequency components
of the sound signal. It is the result of subtracting an
A-weighted LAeq from a simultaneously collected
C-weighted Leq.
Appendix D
EX
Expected value. Calculated on the basis of 100ms
Leq results.
Appendix D
SD
Standard deviation. Calculated on the basis of
100ms Leq results.
Appendix D

Svantek SV 971A Specifications

General

Brand	Svantek
Model	SV 971A
Category	Measuring Instruments
Language	English