"Noise Pole" - Environmental Noise Monitoring Terminal
The Noise Pole is an environmental noise monitoring
terminal that has been designed for long term monitoring.
It is particularly suited for installation in residential
areas where appearance and resistance to vandalism are essential.
The Noise Pole meets the required acoustic and environmental
specifications:
- Class 1 to IEC 61672, Type 1 to IEC 60651 and IEC 60804
- Measurement range 20 to 140 dB(A) - single span
- Mounted to the top of a tilting mast
- Automatic noise event detection (e.g. aircraft)
- Multiple noise environment groups
- Integrated weather sensor option
- Connection via direct link, modem or GSM.
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CR243/4 "Noise Pole" |
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.
Protection Against the Elements
The Noise Pole is intended for the long term monitoring
of noise around large areas. In this case "Long term" can
mean anything from a few months to many years. The power supply,
communications equipment and backup batteries are installed inside
the mast, with the acoustic processor in the small box at the top
of the mast. All parts, including the microphone, are well protected
against rain, snow and sun damage, giving a maintenance schedule
of typically six months or one year.
Although the Noise Pole can be used for shorter periods,
the installation requirements (base, mast, power, communications)
usually suggest the use of a portable
noise monitor in these circumstances.
Protection Against Vandalism
The Noise Pole is intended use in residential areas and
so is designed to not attract too much attention. This is the Pole's
best defense against vandalism. It is mounted on a standard tilting
mast as used in most areas for lighting. All electronic and sensitive parts are mounted either inside the
mast or right at the top. The mast is extremely strong and protective. |
