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MEMS microphone smoothes the way to natural voice control in smart consumer devices

October 21, 2011 // Paul Buckley

MEMS microphone smoothes the way to natural voice control in smart consumer devices

STMicroelectronics has expanded the company’s sensor portfolio with a new high-performance, low-power digital MEMS microphone. Housed inside an ultra-small 3 x 4 x 1 mm package, ST’s MP34DT01 top-port microphone delivers a best-in-class audio experience in mobile phones, tablets and other smart consumer devices.


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The MP34DT01 employs a patent-pending technology that allows designers to place the microphone membrane closer to the acoustic port hole on the top of the package with a substantial increase in performance and no penalty in size. It is the first MEMS microphone in the market that couples the advantage of a top-port sound-inlet position with unparalleled signal-to-noise ratio (SNR) of 63 dB and flat frequency response in the full audio band of 2020,000 Hz.

STs MP34DT01 outclasses competing devices as the first top-port digital MEMS microphone with better acoustic parameters than existing bottom-port mics. The device perfectly matches the needs of clever speech-recognition systems for voice-controlled software and electronic-assistant applications being used in new consumer applications, where improving audio intelligibility without increasing the workload on the main processor, is a key factor. The devices best-in-class SNR makes it also suitable for applications beyond typical consumer applications, such as phonometers sound-level meters that require high dynamic range.STs MEMS microphones use best-in-class acoustic sensor technology jointly developed with OMRON that is inherently less susceptible to mechanical vibration, temperature variations and electromagnetic interference, while providing high-fidelity reproduction of audio signals at low power consumption.
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