Mouser offers microphone that can receive voice commands from a distance
Published2018.03.29 15:39Less than 1% distortion even at 128dB SPL
Mouser Electronics, Inc. is now stocking the IM69D120 and IM69D130 XENSIV MEMS microphones from Infineon. The IM69D120 and IM69D130 are high-performance, low-noise microphones ideal for applications requiring high-quality audio capture, voice user interfaces, active noise cancellation (ANC), and audio pattern detection in monitoring systems.
Infineon’s XENSIV microphones, available from Mouser Electronics, address low self-noise, wide dynamic range, low distortion, and high acoustic overload points. Infineon’s dual-backplate MEMS technology maintains high linearity of the output signal within a dynamic range of up to 105 dB. The dual-backplate MEMS technology is based on a compact symmetrical microphone design and is similar to that used in purely differential studio condenser microphones. This technology improves high-frequency immunity, enhancing audio signal processing and increasing the acoustic overload point at 10% THD (Total Harmonic Distortion) up to 135 dB SPL.
The IM69D120 and IM69D130 are small, measuring 4 × 3 mm, but have a noise floor of only 25 dBA (signal-to-noise ratio of 69 dBA) and distortion of less than 1% even at 128 dB SPL. For design flexibility, the IM69D120 microphone is designed to preserve SNR of 69 dBA within the dynamic range of a 16-bit system, while the IM69D130 is suitable for 20-bit systems. The SNR is improved by 5 dB compared to conventional MEMS microphones, and the distance between the devices capturing user and voice commands is increased by up to 2 times. In addition, the flat frequency response and tight manufacturing tolerances lead to close phase matching of the microphone, which is useful for microphone array applications.
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