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29 Basic setups
Measurement setup (for community noise)
Models SE and DL
• CNEL – Press Enter to select data field. Press Enter
repeatedly to toggle between On/Off setting.
• L
c-a
– Press Enter to select data field. If marked “N/A,” see “C-
A measurement settings.”
• TAKTMX ~ Press Enter one or more times to select 3 sec., 5
sec., or Off.
6. To change other measurement settings, repeat steps 4-5.
7. When finished, press On/Off/Esc to exit the screen.
The following table explains your selections in the Measures screen
(Please see Appendix B, Glossary of Terms for more details.)
Measurements
Explanation
L1-L4
(Exceedance)
L1-L4 are types of exceedance levels. This is defined as the
level exceeded by the measured noise level for an identified
fraction of time. Exceedance levels may be calculated for
many time fractions (or percentages).
• Optional Settings: Set to “Off” or to a percentage value of
your choice (1-99%).
LDN
Representing the Day/Night sound level, this measurement is
24-hour average sound level where 10 dB is added to all of the
readings that occur between 10pm to 7am. (Please see
glossary of terms for more details).
• Optional Settings: Set to “Off” or “On”.
CNEL
Community Noise Exposure Level. The accumulated exposure
to sound measured in 24-hour sampling interval and artificially
boosted during certain hours.
Optional Settings: Set to “Off” or “On”.
L
c-a
This measurement (also commonly called C-A measurement) is
only available under certain conditions. Information about
viewing and changing these meter settings is discussed under
the next section, “C-A measurement settings”. Optional
Settings: Set to “On” and “Off”. See C-A section below for
parameter settings.
TAKTMX
A time average over a sampling that uses the highest level
occurring during the preceding Taktmaximal interval (either
three or five seconds), and assumes it was present for the
whole Taktmx interval.
Optional Settings: Set to “Off”, “3sec”, or “5sec”
Table 3-2: Measures screen explained