MESA, Ariz. --May 16, 2003-- Acoustic Technologies, a developer of high-quality full-duplex communication software and ICs for cellular, Bluetooth, VoIP, and other telephony products, today announced it has closed on $13.8 million in its third round of funding. The cash will be used to fund additional new product development and to grow sales and technical support resources to respond to the increasing demand for the company's new products.

"Acoustic's SoundClear products for improved voice quality offer a unique value proposition to makers of cellular handsets, hands-free car kits, and other speakerphone-enabled telephone products," commented Bill Turner, managing director and co-founder of Signature Capital Management, LLC. "Like Acoustic's customers, our investor network saw the value and responded by purchasing all shares offered. We are delighted to work with Acoustic Technologies and help raise the capital they need to grow their business."

"We believe our business is poised for rapid revenue growth as we move our products from development to design-in and production. Customer activity is high, especially with cellular handset vendors, and the additional capital should fund us through business development and production ramp," said Samuel Thomasson, president and chief executive officer, Acoustic Technologies Inc. "Signature Capital has an impressive investment track record. We are pleased to have their network of investors as our financial partners bringing us capital as well as relationships and industry insight that is critical to our success."

A limitation to existing speakerphone-enabled cell phones is the unnatural way they deal with echo. The way to solve echo and background noise for normal cellular handset use is very different from the solution when in speakerphone mode. Many existing cellular speakerphones simply use the same handset echo cancellation techniques in this more complex speakerphone environment. As a result, the communication becomes choppy and part of the meaning is easily lost. For speakerphone operation, more performance is needed to achieve good voice quality, speech intelligibility, and full-duplex communication.

Full-duplex communication refers to natural conversation flow -- just like a face-to-face conversation. Without full-duplex capability, conversations can be fatiguing and people find they must use extreme concentration just to understand the dialogue. Also, people must wait for pauses in conversation in order to interrupt the other speaker. Full-duplex operation helps eliminate the misunderstanding that comes from lost syllables or word clipping. Cellular users, network operators, and telephone manufacturers are demanding products that solve the problems of poor voice quality caused by echoes and harsh noise environments.

Acoustic Technologies' unique SoundClear® products enable natural full-duplex voice communication for cellular and desktop speakerphone applications. SoundClear uses a combination of patented techniques including echo cancellation, noise reduction, and sound enhancement along with voice activity detection and non-linear processing to offer clear and natural bi-directional speakerphone operation. The Acoustic Technologies SoundClear solutions are implemented as DSP software for mobile applications and as ICs for use in other telephony products such as hands-free car kits, Bluetooth products, VoIP phones, and conference phones.

About Signature Capital

Signature Capital is a results-oriented venture capital firm that uses its insight, wisdom and a proven track record to help businesses striving to reach their full potential and investors striving for significant financial rewards. You might say they specialize in the art of product legacy and wealth creation. What sets Signature apart from other venture capital firms is its intense commitment to clients and its focused and disciplined investment approach. Unlike other firms, Signature offers substantial value beyond capital. For more information on Signature Capital or any of the companies in its portfolio, visit their Web site at http://www.sigcap.com.

About Acoustic Technologies

Founded in 1998, Acoustic Technologies is a privately held company headquartered in Mesa. Acoustic Technologies creates high-quality semiconductor and software solutions for leading telecom manufacturers worldwide. The SoundClear® brand of patented full-duplex communication and echo cancellation solutions is enabling significant advancements in telecommunications voice quality. SoundClear provides natural bi-directional communication in business speakerphones, mobile phones, VoIP telephones, hands-free car kits, Bluetooth accessories, and other speakerphone-enabled products. 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. Sub-band Adaptive Spectral Slicer, Ultra Long Echo Tail, QuadraVAD, and eXcho are trademarks of Acoustic Technologies Inc. All other service marks and trademarks are the property of their respective owners.

Contact:

Acoustic Technologies Inc., Mesa
Jim Jacot, 480/507-4303
public-relations@acoustictech.com