Top- and bottom-port HD voice MEMS microphones

November 29, 2012 // By Julien Happich
The complete analog and digital family of top- and bottom-port high definition (HD) voice microphones released by Akustica feature a high 63dB signal-to-noise ratio (SNR) from 20Hz to 20kHz, super wideband frequency response, and tightly matched +/-2dB sensitivity.

These characteristics support the growing trend in the mobile device market to use higher-performance audio components along with noise-processing algorithms to deliver HD voice quality in mobile devices. Akustica's new microphones are also drop-in replacements for today’s most commonly used MEMS microphones, providing a straightforward path for manufacturers to upgrade current designs to meet market demand for more natural-sounding conversation and improved speech recognition accuracy that is achieved through HD voice-quality components. Multi-microphone noise suppression algorithms rely on well-matched acoustic characteristics among the microphones for optimized performance.

The AKU142/342 deliver a traditional analog output in an industry-standard 2.95x3.76x1.1mm form factor whereas the AKU240/440 offer digital PDM outputs in industry-standard 3.0x4.0x1.0mm form factors. The AKU142 and AKU240 are Top-port designs, the AKU342 and AKU440 microphones are bottom-port designs. All devices have a flat frequency response of +/-5dB from 50Hz to 14kHz and come in faraday-shielded packages for radio frequency and electromagnetic immunity

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