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Portable Environmental Noise Monitor
The CR245 Portable Noise Monitor can be used for short-term monitoring,
or as part of a larger Noise Monitoring Systems, mixed with fixed
terminals such as the Noise Pole.
- Construction site boundary noise monitoring
- Industrial sites - monitoring close to complainant's premises
- Airport noise - part of a larger system
- Road and rail - regular relocation of the monitor
The Portable Noise Monitor meets the strict requirements
of the sound level meter standards:
- Class 1 to IEC 61672, Type 1 to IEC 60651 and IEC 60804
- Measurement range 20 to 140 dB(A) - single span
- Automatic noise event detection (e.g. aircraft)
- Multiple noise environment groups
- Connection via direct link, modem or GSM.
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Portable Noise Monitor |
Noise Monitoring Functions
The noise monitor has a number of different noise measurement
stores, all running in parallel. The main measurement stores are:
Noise Events - These are acoustic events such
as an aircraft flyby or train passing. The noise monitor can be
configured to detect such events based on the sound levels, duration,
rate of rise and fall, etc. Detected events are stored by date
and time along with acoustic parameters such as LAeq, LAmax, duration.
The Leq is also stored every second to provide a graph of the noise
event.
Noise Environments - These typically describe
the surrounding background noise around the site. All noise is
included in these measurements, but the Noise Events can
be removed, giving an impression of the environment without these
occurrences. Multiple Noise Environments run in parallel
with user selectable time periods. Parameters such as LAeq, Ln
(L10, L90, etc.) are stored.
Time History - The "short Leq" is stored
every second, giving a detailed graph of the sound level over time
and allowing for more detailed analysis and reporting.
Portable as Part of a Large System
The measurements from the Portable Noise Monitor are totally
compatible with those from the Noise
Pole and Extreme Monitor.
With the fixed monitors dealing with the continuous long-term
measurements, the portable units can be strategically placed
to give additional sound level information, such as close
to the boundary or close to a complainant's premises. |
Noise Monitoring System |
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Semi-Permanent Installation
For medium-term monitoring systems (a few months), the
fixed Noise Monitoring Terminals may well be overkill.
In these situations, the CR245 Portable Noise Monitor can
be used
The usual semi-permanent installation consists of the microphone
mounted on a wall and the main processor box installed inside
a building. |
Semi-permanent |
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