Mesa, AZ - April 16, 2007 – Acoustic Technologies, Inc., the leading provider of high quality audio solutions for hands-free products, today announced the patented SoundClear with multi-mic noise cancellation is now available on CSR's BlueCore5-Multimedia Bluetooth platform. The SoundClear multi-mic solution will allow CSR's BlueCore5-Multimedia customers to utilize two microphones and features noise cancellation and speech enhancement to reduce background noise and optimize speech intelligibility in products such as Bluetooth headsets, automotive navigation, hands-free systems, and mobile handsets. The software enables a natural high quality bi-directional conversation with acoustic echo cancellation, noise cancellation, and full-duplex control. The full-duplex control dynamically monitors, detects, and processes incoming voice, echo, and noise signal power levels to deliver clear and natural audio.

"Consumers are demanding more of their wireless devices in terms of performance, audio quality and power consumption. BlueCore-Multimedia with SoundClear caters to this trend and provides a powerful base for future evolution" commented Anthony Murray, Senior Vice President of CSR's Wireless Audio Strategic Business Unit. "We are pleased to add Acoustics' field proven SoundClear solution offering enhanced noise cancellation, echo cancellation, and voice quality."

The multi-mic SoundClear solution for the BlueCore5-Multimedia offers the following key features:

• 20 dB Noise Cancellation
• Wind Noise Detection and Cancellation
• Dynamically Adjusts to Changing Backgrounds
• Effective up to 25 dB SNR
• Smooth and Natural Call State Transitions
• Simple and Fast Tuning with RAPID™ Tool

"Adding multi-mic noise cancellation to our existing SoundClear product raises the sound quality bar even higher for headsets, hands-free kits, and other products requiring higher levels of noise cancellation" said Bob Ackmann, CEO of Acoustic Technologies. "We are pleased to further extend our product offerings for the CSR BlueCore products and to extend our relationship with the world leader in Bluetooth."

When combined with Acoustic's powerful RAPID tuning tools and audio consulting, the SoundClear software helps customers get products to market quickly and with the highest quality audio performance.

For customers using the SoundClear solution, Acoustic offers:

• Acoustic Analysis and Audio Consulting
• Custom Software Development (DSP/ARM)
• Electrical Design and Layout Services

At the headquarters in Arizona, Acoustic's experienced software, hardware, and systems engineers utilize state-of-the-art audio equipment to assist with customer projects. Audio consulting includes test and measurement, electrical analysis, mechanical analysis, and recommendations on transducers and plastics. For product improvement, Acoustic prepares a comprehensive report citing the acoustic analysis results and detailed recommendations for achieving optimal sound quality. This process has been utilized by companies worldwide to optimize the audio quality of their products, enabling hands-free communication to sound just like a "face-to-face" conversation.

Multi-mic SoundClear software for the BlueCore5 is available for immediate integration.

About CSR
CSR is the leading global provider of personal wireless technology and its product portfolio covers Bluetooth, GPS, 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
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 headquartered in Mesa, Arizona. For additional information, the company can be reached directly at (480) 507-4376, or via the Internet 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.

Contact:
Michelle PollardAcoustic Technologies, Inc.Phone: 480.507.4300 Michelle.Pollard@acoustictech.com