A noise assessment outcome is never a simple figure such as “77dB”. In practically every environment, a large number of different sources contribute to the ambient noise at a particular point and are often impulsive or contain pure tones. Collecting data for noise assessments requires a broad knowledge of the relevant measurement parameters and methods and wide selection of tools that correspond to the conditions and task at hand.
Brüel & Kjær’s environmental noise platform provides environmental engineers with a range of flexible, efficient and easy-to-use quality sound level meter solutions with innovative wireless communication options, built-in high capacity sound cards, self-calibrating instruments and rugged yet light materials. All solutions comply with the most common international and national standards to assess:
- Traffic noise (road, rail, aircraft)
- Industrial noise (from plants and commercial businesses)
- Recreational noise (entertainment events and leisure activities)
- Noise from neighbours
- Noise from construction sites
Noise from machinery, factory pumps, industrial blowers and processing equipment is continuous and tonal, and can be annoying. Measurements of commercial noise, if not in relation to urban planning or zoning requirements, are often based on complaints from neighbouring residents. Quite often, measuring for just a few minutes with a sound level meter is sufficient to determine the noise level
The most common source of environmental noise is road traffic which accounts for more than 90% of unacceptable noise levels in Europe. Therefore, traffic noise reduction measures often have the highest priority – whether imposing restrictions on the noise sources, rezoning residential areas, setting up noise barriers, or enforcing façade sound insulation measures in buildings. Our state-of-the-art acoustic measurement equipment is well-suited for short and long-term monitoring of traffic.
Entertainment and Leisure Noise
In the past, event arrangers had to employ a number of people to constantly check multiple sound level meters for noise levels. Quick, coordinated responses to rising levels were, thus, difficult to manage. With the incorporation of wireless solutions, Brüel & Kjær makes it possible to see and control all sound level meters from one computer screen. This simplifies monitoring and reduces the number of personnel required to ensure the right amount of noise for both attendees and the local community.
A construction site changes all the time – the section, site, machinery, material and work crew will vary on any given day. The equipment used not only has to withstand dust, dirt, impacts, vibration and moisture, but also has to be flexible and easy to move. Brüel & Kjær’s sound level meters are designed for easy one-hand operation and can be integrated into a complete system for short or long-term monitoring. The instruments have been thoroughly tested for ruggedness and reliability.
Privacy issues, the unpredictability of noise events and subjective opinions on what is considered annoying, make noise assessments of residential homes tricky. To make it worse, the fear of reprisals often prevent suffering neighbours from allowing noise assessors onto their property. Taking this into account, Brüel & Kjær has designed a special system to help environmental engineers and residents to record and identify noise sources easily and discreetly.