Larson Davis System 824 User Manual

6-58 824 Reference Manual 11/8/00
The following explains each of the display’s components:
Display label
- This shows the current display (for example,
“
Metrics-a”
).
Leq Reading
- This display shows the average level over the
elasped time.
DNL Reading
- The DNL (Day-Night Average Sound
Level) display shows the equivalent sound level for the
entire measurement period with a +10dB weighting applied
to all sounds occurring between the times 22:00 and 07:00.
CNEL Reading
- The CNEL (Community Noise Equivalent
Level) display shows the equivalent sound level for the
entire period with a +5dB weighting applied to all sounds
occurring between the times 19:00 and 22:00 and a +10dB
weighting applied to all sounds occurring between the times
22:00 and 07:00.
Elapsed Time
- This shows the elapsed time of the overall
measurement.
Metrics-b Display
The
Metrics-b
display consists of six major components:
• Display label
•L
eq
Reading
•L
eq
Exceedance
•L
eq
Background
Display label
Leq Reading
DNL Reading
CNEL Reading
Elapsed Time

Larson Davis System 824 Specifications

General

Brand	Larson Davis
Model	System 824
Category	Measuring Instruments
Language	English