CSR Adds Noise Cancellation and Enhanced Speech Intelligibility to BlueCore

CAMBRIDGE, England—(BUSINESS WIRE)—January 26, 2007— CSR plc (LSE: CSR):

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CSR today expanded its portfolio of high quality third party software extensions for its BlueCore-Multimedia platform - including our advanced BlueCore5-Multimedia silicon. The ATS6000MM SoundClear Multi-Mic noise cancellation and hands-free audio processing software from Acoustic Technologies will allow CSR's BlueCore-Multimedia customers to integrate advanced noise cancellation and enhanced speech intelligibility into products such as Bluetooth headsets, automotive navigation, hands-free systems, and mobile handsets. This new addition to CSR's eXtension Partner Programme offers customers exceptional voice quality and performance when designing BlueCore Multimedia based products.

"The eXtension Programme is the only initiative of its kind in the industry and this is solely down to the powerful silicon platform we have developed in BlueCore-Multimedia," commented Anthony Murray, Senior Vice President of CSR's Wireless Audio Strategic Business Unit. "We are pleased to add Acoustic's field proven SoundClear solution offering enhanced noise cancellation, echo cancellation, and voice quality."

The single-chip multimedia Bluetooth devices are based on CSR's high-performance Kalimba DSP coprocessor, which supports third party enhancements while maintaining very low power consumption and high audio quality for both voice and music applications. To date, CSR is the only company capable of offering such a powerful combination, of hardware and high quality third-party software enhancements, to designers allowing them to create high-performance, customisable devices without needing to compromise on critical elements such as power consumption.

Bob Ackmann, CEO, Acoustic Technologies, explained, " CSR leads the field for Bluetooth wireless technology. We are delighted to work together to offer the SoundClear Multi-Mic audio solution and the added value it provides to CSR customers using its silicon platform. Our affiliation with the world leader in Bluetooth has allowed us to reach a global audience of designers and will allow the industry to move forward with better quality voice communications, making Bluetooth an even more attractive prospect to end-users."

The ATS6000MM SoundClear technology uses two microphones to eliminate noise and achieve a higher level of sound quality. The software automatically adjusts its calculations according to environmental conditions, the speaker's voice and the quality of the line connection. The software operation can also be optimised by end-product designers according to the type of plastics, transducers and desired audio configuration adopted.

Murray concluded, "Consumers are demanding more of their wireless devices in terms of performance, audio quality and power consumption. BlueCore-Multimedia with SoundClear caters for this trend and provides a powerful base for future evolution."

About CSR

CSR is the leading global provider of personal wireless technology and its product portfolio covers Bluetooth, FM receivers and WiFi (IEEE802.11). CSR offers developed hardware/software solutions, based around its silicon platforms that incorporate, fully integrated radio, baseband and microcontroller elements.

CSR's customers include industry leaders such as Apple, Dell, LG, Motorola, NEC, Nokia, Panasonic, RIM, Samsung, Sharp, Sony, TomTom and Toshiba.

CSR has its headquarters and offices in Cambridge, UK, and offices in Japan, Korea, Taiwan, China, India, France, Denmark, Sweden and both Dallas and Detroit in the USA.

More information can be found at www.csr.com

About Acoustic Technologies, Inc.

Acoustic Technologies creates high quality hands-free, audio processing software, semiconductor, and system solutions for leading telecom manufacturers worldwide. The SoundClear brand of patented full-duplex communication, echo cancellation, and noise reduction solutions is enabling significant advancements in telecommunications voice quality and is proven in millions of products around the globe. SoundClear provides natural bi-directional communication in mobile phones, hands-free car kits, Bluetooth accessories, VoIP telephones, conference phones, and other speakerphone enabled products. Acoustic Technologies is a privately held company headquartered in Mesa, Arizona.

For additional information, the company can be reached directly at (480) 507-4376, or via the Internet at www.acoustictech.com

SoundClear is a registered trademark of Acoustic Technologies Inc. All other service marks and trademarks are the property of their respective owners.


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