Inside the world's quietest place at Microsoft

Microsoft® has a vision to make its customer devices so effortless to use that they all but disappear
By: Bruel & Kjaer
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ROYSTON, England - May 24, 2016 - PRLog -- Since sound quality holds the key - the company built a series of anechoic chambers for testing, which include the quietest place in the world

As well as machines understanding humans, people also need to understand each other effortlessly if technology is to become an 'invisible' assistant. Microsoft devices use multiple microphones to hone in on voices with location algorithms and then - by separating voices from background noise - they clarify the signal so users do not have to strain their ears or raise their voices to be heard.

Beneath such clever programming however, the quality of any audio interface ultimately comes down to its hardware. As LeSalle Munroe, Senior Engineer, Surface Devices said: "Good voice recognition starts with good acoustic design. Our anechoic chambers and test equipment allow us to reliably characterise our microphones and speakers to give us the best chance of meeting our voice recognition goals."

"We always want to have the best tools available for the job," continues LeSalle. "Our other anechoic chambers are very good, no doubt. However, we wanted to build one with even better audio capabilities, so we could measure lower levels of sound, a higher purity of sound measurements and increase the validity - and reliability - of our measurements, so we can quantify the audio performance of our products at a finer and greater level of detail. The chamber and the Brüel & Kjær microphones and preamps we use allow us to achieve the repeatability we want."

More information about Microsoft's record-holding anechoic chamber and hardware testing is available on Brüel & Kjær's website:


About Brüel & Kjær

Brüel & Kjær is a world-leading manufacturer and supplier of sound and vibration measurement systems.

We help customers measure and manage the quality of sound and vibration in their products and in the environment. Focus areas are aerospace, space, defence, automotive, ground transportation, airport environment, urban environment, telecom and audio.

Brüel & Kjær has an unparalleled portfolio of sound and vibration equipment and is a long-established designer and manufacturer of innovative instrumentation including sound level meters, microphones, accelerometers, conditioning amplifiers, calibrators, noise and vibration analysers, and PULSE software.

We also design and manufacture the LDS range of vibration test systems, as well as complete airport and environmental monitoring systems: WebTrak, ANOMS, NoiseOffice and Noise Sentinel.

To see the full range of solutions, systems and products, please visit

Brüel & Kjær runs a variety of training courses - from basic introductions to noise and its effects to more specialised classes teaching customers how to get the most out of their equipment. Free online training courses, conducted by our expert engineers, run throughout the year too. For all course registration details visit

Brüel & Kjær is a subsidiary of UK-based Spectris plc ( which has annual sales of £1.1bn and employs around 8,300 people worldwide across its four business segments.

For additional information, please contact:

Heather Wilkins

Marketing Coordinator

Bruel & Kjaer

Telephone: 01223 389 800



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