The new trailer of the Department for Immission Control is sophisticated down to the last detail. For example, solar panels supply the measuring instruments with electricity during long-term measurements. Moreover, the rugged measurement vehicle with anti-theft protection guarantees that the sensitive measuring equipment is transported with the greatest possible degree of safety. The requirements of the German Law on Occupational Employee Health and Safety and Traffic Safety (Securing of Loads) are also adhered to.
The heart of the measurement technology is a measuring case containing the compact Type 2250 sound level meter from HBK. When taking measurements of environmental noise, this rugged measuring instrument delivers reliable results with laboratory precision even in difficult conditions. Furthermore, the powerful Class 1 single-channel sound level meter and sound analyzer can easily be expanded. A large range of high-quality microphones and accelerometers is available as needed. In addition, the selection of the Type 2250 was also influenced by its application-based platform, which meant it could be individually adapted to the Regional Council’s requirements.
For example, connecting the trailer to the internet enables just-in-time evaluation of measurement data and more targeted analysis of acoustic monitoring. Thanks to digitization, measurement personnel can begin analysis while measurements are still ongoing, and adjust the setup of measurements if necessary. This makes the battle against noise much more efficient.
Since the weather also has an influence on noise pollution, weather data is analyzed in parallel to the noise measurement itself. For this purpose, the trailer has equipment for measuring the ambient pressure, wind speed and direction, precipitation, and air humidity and temperature.
The recorded noise emissions are determined and evaluated in accordance with the Technical Instructions on Noise Abatement (TA Lärm). Judgment on whether a noise is too loud is based on a comparison with the noise immission guideline values specified in the TA Lärm. As well as a limit for the maximum level of short-term peak noise, other noise emissions are energetically averaged over the entire day or over one hour at night.