Bruel & Kjaer UK Ltd. - PRODUCT NEWS







Brüel & Kjær launches sound quality focused headphone amplifier

Sound quality testing using consumer panels is now a much quicker process with Brüel & Kjær’s new Headphone Amplifier ZE-0769-004.

Subjective listening tests are vital for assessing a product’s competitiveness and usually involves the evaluation of a product’s sound quality by a group (or jury), representing the targeted customer group, who undertake a listening test.

Typically this is usually a lengthy and expensive procedure, requiring each jury member to test drive the prototype vehicle, in order to report back on the sound quality. This process has been sped up by using a binaural head - such as a Head and Torso Simulator (HATS) - in the car to make a high quality recording of the sounds directly onto the hard disk of a computer. The recording is then played back to all the panel members via headphones, at an off site venue.

Since the absolute level has a direct effect on juror preference, the headphone amplifier is designed to give the same level in all channels and has stepped gain control to be able to accurately return to a previous setting.

The amplifier produces an exact replica of the input signal and delivers the unfiltered (and possibly attenuated) signal to all outputs.

The amplifier supports listening panels for up to 12 people and is ideal for sound evaluation during the design phase, prototype evaluation or trouble-shooting of new vehicles.


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. (www.spectris.com). 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.
Jarman Way, Royston, Herts. SG8 5BQ. UK
Tel: +44(0) 1763 255 780
Fax: +44(0) 1763 255 789
E-mail:
ukinfo@bksv.com
Website: www.bksv.co.uk

February 2011

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