Svantek Shawcity SVAN 977C, Руководство пользователя

Страница: 139 / 343

139 SVAN 977C User Manual
LRm Rolling (sliding) Leq screen for the last m minutes of
measurement (m x 60 seconds) moving with 1 second
step.
Chapter
4.1
Appendix D
D.1.2
SEL
Sound Exposure Level, the constant sound level that has
the same amount of energy in one second as the original
noise event and is the subset of the
Leq result so, for the
integration time equal to 1 s, SEL is always equal to Leq .
Appendix D
D.1.2
LEPd Daily Personal Noise Exposure, the noise exposure level
for a nominal 8-hour working day, used for assessing the
noise exposure of a worker during a working day. The
LEPd result is calculated on the base of the Leq .
Appendix D
D.1.2
Ltm3
Takt-Maximal Level calculated according to the German
standard TA Lärm. Appendix D
D.1.2
LTeq Takt-Maximal Level calculated according to the German
standard TA Lärm. Appendix D
D.1.2
Ln Statistical Noise Levels, the certain boundary level
surpassed by the temporary noise level values in not
more than nn% of the observation period.
Ln are
calculated on the base of 100ms Leq results and
renewed every second on the display as cumulated
statistics over the current measurement time.
Appendix D
D.1.2, D.4
L(den) Day-evening-night equivalent level, Leq . Sound Level,
measured over the 24 hour period, with a 10 dB penalty
added to the levels between 23.00 and 07.00 hours and
a 5 dB penalty added to the levels between 19.00 and
23.00 hours to reflect people's extra sensitivity to noise
during the night and the evening. The instrument
displays: Ld, Le, Ln, Lde, Len, Lnd, or Lden depending
on the day and nighttime which the measurement covers.
Due to different country requirements, it is possible to
shift daytime from 7h-19h to 6h-18h.
Appendix D
D.1.2
EX Expected value. Calculated on the basis of 100ms RMS
results. Appendix D
D.1.2
SD Standard deviation. Calculated on the basis of 100ms
RMS results. Appendix D
D.1.2