Bruel & Kjaer UK Ltd. - PRODUCT NEWS

Setting the tone - Bruel & Kjaer launch tonal noise assessment tool.

Local authorities and acoustic consultants can reduce time and money spent investigating the existence of elusive tonal noises with sound and vibration expert, Bruel & Kjaer’s new tone assessment tool.

Tonal noise typically contains a noticeable - or discrete - continuous note which can include hums, hisses, screeches or droning sounds; these particular noises are difficult to prove and can quite often be disputed.

Created for use with Bruel & Kjaer’s 2250 sound level meter, this tone assessment application provides simultaneous measurements of the LAeq – as well as other broadband parameters. It provides on-the-spot calculations for tone-corrected rating levels and the results are displayed in accordance with ISO 1996-2 Annex C.

By using ISO 1996-2, which provides an objective method for verifying the presence of tones, Bruel & Kjaer’s tone assessment produces instant, objective feedback allowing users to determine whether they have identified the problem or need to make further measurements.

Bruel & Kjaer’s instruments are also equipped with a tone generator so that an audible tone can be compared with the measured sound.

The tonal assessment application is available as an add-on with Bruel & Kjaer’s FFT Analysis software for the Type 2250 sound level meter. The 2250 meter is extremely user-friendly with a large dynamic range and frequency resolution allowing the operator to simply position the analyzer in an appropriate location and start measuring.

As objective measurement results can be very comprehensive in detail, it’s helpful to have a sound recording of the noise for the benefit of a non-technical audience. For this purpose, Bruel & Kjaer’s tonal assessment tool is also compatible with its 2250 meter’s sound recording tool.

About Bruel & Kjaer
Brüel & Kjær is a world-leading manufacturer and supplier of sound and vibration solutions for use in a wide range of applications including environmental noise measurements, building acoustics, vibration measurements and quality control for use in the automotive, aerospace and consumer industries, as well as by local authorities. Today Brüel & Kjær has 900 employees and sales offices in 55 countries. Brüel & Kjær is a subsidiary of UK-based Spectris plc. ( Spectris has annual sales of approximately £656m and employs around 6000 people worldwide in its 15 business units.
For more information, please contact :-

Bruel & Kjaer UK Ltd.
Bedford House, Rutherford, Close, Stevenage, Herts. SG1 2ND. UK
Tel: +44(0) 1438 739000
Fax: +44(0) 1438 739099

January 2008

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