The WPK Outdoor Noise Measurement Kits are designed for outdoor applications, where a meter needs to be left unattended in poor weather conditions to monitor for up to a week:
These noise measurement kits include a Sound Level Meter that was designed specifically for environmental noise measurement. The meter meets the sound level meter standards to Class 1 and makes all the measurements required by most such surveys, including the periodic LAeq and the statistical Ln parameters (L10, L90, etc).
The meter makes automatic repeating measurements, providing the tables of periodic results typically needed for this type of survey.
For most environmental noise surveys we recommend the WPK1710 Outdoor Kit, which is the lower cost version of the Class 1 kits. The meter in this kit includes the environmental noise parameters (Leq, Ln, etc), automatic timed measurements and audio recording.
For an overview of the other meters available please see the Which Meter tab.
The only exception to our recommendation is if you are measuring potentially tonal noise. In this case we recommend either of the following models:
The sound level meter included in this kit is suitable for almost any noise measurement application, not just environmental noise, as it exceeds the requirements of most regulations such as those covering occupational noise. If you have additional applications as well as your environmental noise monitoring then these meters will usually be suitable for that too.
These kits are designed to be left unattended for up to seven days, making automatic and repeating measurements. For example, many surveys require repeating 15 minute measurements, providing parameters such as:
For medium term noise monitoring in and around sites during construction and demolition work. For longer term monitoring we recommend the EM2010 Environmental Noise Monitor. For monitoring over a few weeks or months the Outdoor Kit should be ideal. The kit can be set up at a suitable location and left to run for a week. At this point you can take it back to the office to download and recharge, or take a laptop out along with a recharged batteries to swap (additional batteries are not included).
The noise measurements required on construction sites tend to include the periodic LAeq and LA90.
For short term and mobile boundary noise monitoring, this application is very similar to Construction Noise (described above). Noise limits may be set by a local authority, demanding that noise levels be monitored 24 hours around a site, sometimes at multiple locations. The measurement of LAeq and LA90 is normally required.
Longer term monitoring at fixed locations can be achieved with the EM2010 Noise Monitoring.
The Outdoor Noise Kit can be easily relocated, making short term (up to one week) measurements at multiple locations much easier. Monitoring the noise at the roadside or by rail links or airports usually demands the measurement of the LAeq, LA90 and LA10, all of which are carried out simultaneously on the Optimus Green range of meters, as included with this kit.
If environmental noise has a tonal content then it is sometimes necessary to measure it with 1/3 Octave Band Filters. The meter in this kit does not include either 1/3 octaves or tonal noise detection. For those applications please select one of the following:
All the WPK17xx outdoor kits come with an Optimus Green Sound Level Meter. The WPK kits on this page include either the CR1710 Class 1 meter or the CR1720 Class 2. Most applications demand the Class 1.
This meter includes the following features:
You can read more about the meter itself on the Optimus Green page.
This meter is ideal for most environmental noise measurement applications. The exception to this is when you need to assess potentially tonal noise.
If you need to measure the tonal content of noise then you will need 1/3 octave band filters, which are not included with this meter.
If you are unsure or don't need 1/3 octave band filters at the moment then it is always possible to upgrade at a later date. Some upgrades require the meter to be returned to us, but we can handle all that for you.
For tonal noise assessments please consider one of the following options:
Most environmental noise surveys require the following parameters, or a subset of these:
The measurements will usually be carried out over 5, 15 or 60 minute periods, repeating throughout the survey period.
Some applications need measurements of these acoustic parameters over curfew periods, so for example between 11pm at night and 7am in the morning.
The meters we recommend for use with the Outdoor Kit include all these parameters, and many more.
Automatic, repeating timers can be configured to make measurements over preset or custom periods. These would usually be set to 5 minutes, 15 minutes or 1 hour for environmental measurements. Timers are included with this meter.
As well as the periodic summary measurements the meter also stores a time history noise profile. This can provide a graph of sound level over time and is a good way to pick out noisy periods.
The meter can be set to store time history samples at a rate of 1/100s to 2s.
Once downloaded to the software (which is included) you can plot graphs of the sound level over time and recalculate certain noise parameters.
Before starting a measurement you can record VoiceTag audio notes, which in some environments is easier than writing things down. These are stored on the meter and can be listened to after downloading the measurements.
The meter is also capable of recording the audio during a measurement. These recordings can be threshold triggered based on the sound level, making it much easier to identify the cause of high noise levels when the monitor has been left unattended.
The outdoor noise kit includes the NoiseTools software - there is no extra charge for this. You can download the software to evaluate it before making a purchase.
The NoiseTools software runs on a Windows PC. It is compatible with all recent versions of Windows, from Windows 7 onwards.
The WPK1710 and WPK1720 outdoor kits include the following items:
The main option with this kit is whether to have Class 1 or Class 2. A Class 1 meter is more accurate than Class 2, as defined by the various sound level meter standards such as IEC 61672 and ANSI S1.4.
Most environmental standards suggest the use of a Class 1 meter. Class 1 meters are also often provided with a more sensitive microphone capsule that is better for use in low noise environments.
|Noise Measurements||See Optimus Green Specifications|
|Connectors||Microphone input from MK:172 Outdoor Microphone|
|External Power Connector|
|External power||12-18v DC|
|Dimensions||465 x 180 x 355 mm|
|Weight||14.1 kg / 31 lbs including:|
|2 x batteries, charger & outdoor microphone|