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Date: 6th Feb 2011

Audio chip from ST can deliver quality audio even from damaged speakers

STMicroelectronics has unveiled an audio processing chip that connects directly to the latest miniature microphones and provides a new way of boosting performance from small, low-cost, or even damaged speakers.

The new device, the STA321MP, joins ST's SoundTerminal audio IC family, and features a built-in interface for a MEMS digital microphone as well as a standard microphone input. With tiny dimensions and low sensitivity to noise from LCDs and power components, MEMS microphones are ideal for multi-function products such as smartphones. The STA321MP permits direct connection of a MEMS microphone, saving parts count and cost.

In addition, the STA321MP has a second MEMS input that can be connected to a tiny sensor for detecting speaker movements. This allows designers to apply active-sound shaping using ST patented techniques to optimize speaker performance. In active-sound shaping, the processor compensates automatically for distortion or damage to the speaker enabling high-quality audio performance from over-driven speakers or from those with torn or restricted-movement cones.


 
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