Larson Davis System 824, Справочное руководство

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6-54 824 Reference Manual 11/8/00
• Peak level
The Daily-a display is shown below:
The following explains each of the display’s components:
Display label - This shows the current display (for example,
“Daily-a”).
If the 824 is started at 1900 hours,
the Daily record will run from 1900
hours to 0000 hours and then a new
day (Daily record) will begin. Record Number - Each “Daily” record is shown in the
order that it occurred. The record number indicates the order
of the displayed Daily record in relation to the other records.
A new daily record is created each new day. A day is defined
as 12:00 midnight to 12:00 midnight.
Elasped Time - This shows the elapsed time of this day’s
measurement.
Date - This shows the day, date, month and year for this
record.
Leq Reading - This shows the Leq for the day.
LDN Reading - The DNL (Day-Night Average Sound
Level) display shows the equivalent sound level for a 24-
hour 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 a 24-
Display label
Record Number
Date
Leq Reading
LDN and CNEL Readings
Max and Min levels
Peak levels
Elapsed time
(A new record is
created each
new day)