CSR's BlueCore5-Multimedia now available with Aurisound's Adaptive Focus-Beam noise cancellation technology.

Cambridge, UK – April 2, 2007 –CSR (LSE: CSR) has announced a new third-party software enhancement for its BlueCore-Multimedia platform. As a further addition to CSR's eXtension Partner Programme, Aurisound's Adaptive Focus-Beam™ (AFB) technology is aimed at Bluetooth in-car hands-free kits, headsets and mobile phones. Using high directivity to remove all sound except the speaker's voice, Aurisound's technology allows CSR's customers to provide high quality voice-based applications across a variety of Bluetooth-enabled devices.

Aurisound's AFB represents a breakthrough in acoustic technology as it works independently to the noise source. Through the use of a focused directional beam, AFB enables Bluetooth devices to achieve real-time adaptive response to any acoustic environment, with no distortion. AFB improves clarity for better voice quality as well as improved intelligibility for voice recognition. The reduction of ambient noise also improves voice-encoding efficiency over a Bluetooth link. In addition, Aurisound's 2-mic noise cancellation algorithm uses as few as 10-MIPS and has no restrictions on distance between microphones.

Due to the high performance on-chip DSP, CSR's BlueCore5-Multimedia platform is the only Bluetooth platform available which can support such variety of third-party audio enhancement algorithms, offered through eXtension. In addition, BlueCore5-Multimedia provides superior sound quality with a best-in-class signal to noise ratio of -95dB. BlueCore5-Multimedia also leads the industry for power consumption and radio design.

Anthony Murray, Senior Vice President of CSR's Wireless Audio Strategic Business Unit commented, “The power and flexibility of BlueCore5-Multimedia has enabled CSR to bring third-party innovation and the latest technological capabilities to its customers' devices. By combining CSR's BlueCore technology and Aurisound's acoustic expertise, customers are assured that their devices will achieve the highest levels of connectivity, usability and sound quality.”

Dashen Fan, President and CEO of Aurisound commented, “As consumer expectation for high quality voice capabilities increases, Aurisound's AFB technology meets and exceeds the demand. By working with CSR's BlueCore5-Multimedia platform, customers receive a complete solution that provides industry-leading performance.”

Aurisound can provide both single and dual microphone technologies that offer echo and noise cancellation for a variety of products, such as speakerphones, PDAs and computers.

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Aurisound Unveils Revolutionary Adaptive Focus-Beam (AFB™) Directional Noise Cancellation Microphone without Sidelobe

Bellevue, Washington and Detroit, Michigan - May 17, 2005 -- Aurisound, Inc., a noise cancellation microphone company based in Bellevue, WA, today unveiled at Telematics Detroit 2005 its revolutionary 2-element directional noise cancellation microphone which achieves a typical signal-to-noise ratio improvement of 25dB or higher.

Aurisound's Adaptive Focus-Beam (AFB™) technology utilizes advanced beam-forming and adaptive DSP algorithms to acquire intended voice and remove unwanted noises. The result is a highly directional microphone without any sidelobe. AFB™ technology is effective against all types of noises, including bursting (such as voice), impulsive noise (such as music), stationary noise (such as traffic noise), and acoustic echo. Unlike conventional multiple-element directional microphones, Aurisound's two microphones can be placed very close together, forming a miniature 2-element microphone no bigger than some of the single-element microphones. The 2-element microphone unit that Aurisound demonstrated at Telematics Detroit measures 6.5mm in diameter and 5mm in thickness.

"Aurisound's AFB™ directional noise cancellation microphone is the result of many years of acoustic research and development. It is by far the most effective directional noise cancellation microphone in the market place to the best of our knowledge." said Dashen Fan, President and CEO of Aurisound, Inc. "We look forward to working with our partners and customers to implement our AFB™ technology in a wide range of applications including telematics, Bluetooth, mobile phone, PDAs, etc."