NoiseMeter – SigFox sound level meter
NoiseMeter is the first SigFox sound level meter. It is available since October 2018 in version 1.0
NoiseMeter is equipped with a high quality 1/2 ” microphone that achieves a sensitivity of -53dB (Pa). In the device, the signal is processed by an analog amplifier chain. The level is measured in the range Low (30 – 80 dBA) or High (80 – 130 dBA), with the timings ‘Fast’ or ‘Slow’ and the characteristics ‘A’, ‘C’ or ‘Z’. The switching of the individual areas is controlled by the firmware and can be set in the IoT web application (IBM Watson).
Amongst the many possibilities to use the NoiseMeter, we have highlighted two scenarios.
- 24-hour noise profile with Lden
- Nightlife Hotspot
Our application slide “neighborhood noise” also shows, how we package the data into available volume for Sigfox transmission. A smart algorithm is necessary to reduce the 3600 measurement points (one per second) into only 12 Byte Sigfox data.
The NoiseMeter is equipped with a standard hinge end, as it is used for action cameras. The advantage is that a large selection of mounting adapters is available.
This allows the NoiseMeter to be safely mounted in the right place, whether on the railing of a balcony, on a light pole or on the roof.
If valid acoustics measurements are to be taken in front of house walls, the greatest possible distance from the wall must be kept behind the measuring device. Reflections otherwise falsify the measurement result.
For this case, LXElectronics offers a wall mounting kit that keeps the NoiseMeter stable one meter in front of the house wall. By means of the screw joint described above, the NoiseMeter can be adjusted vertically at an angle of 220 degrees. The extension piece on the device can be mounted turned by 90 degrees, so that alternatively a horizontal adjustment of 180 degrees is possible.
Wall Mount Kit is optionally and not included in standard NoiseMeter.
Already early in 2019, NoiseMeter v1.1 will hit the market. Amongst several improvements are:
- spectral measurements: a second hardware path allows for measuring 7 frequency bands
- Sigfox ready certification: v1.1 will be Sigfox ready and CE certified.
- IP 67 protection class
- Sigfox RC2 and RC4 prepared
Field study Taufkirchen
LXElectronics will set up field study in Taufkirchen, a suburb close to Munich in Germany and surrounded by Autobahns. Within Taufkirchen am Wald, there is an estimated 5000 people living within 800m corridor and 1500 within 250m corridor to the A99.
Derzeit laufen Anfragen an die zuständigen Behörden, um ein Pilotprojekt aufzusetzen.