TDK launches MEMS microphone with outstanding signal-to-noise ratio

TDK extended its range of EPCOS MEMS microphones with the new C928 type. This microphone is distinguished by its particularly high signal-to-noise ratio (SNR) of 66 dB(A) in the frequency range between 20 Hz and 20 kHz. It is thus particularly well suited for demanding applications in smartphones. The high SNR significantly improves the audio quality of distant sound sources, for instance when using the speakerphone or recording videos. Besides its excellent acoustic properties, the C928 features a compact size with a footprint of 3.35 mm x 2.5 mm and an insertion height of only 1 mm.

In conventional microphones, an improved signal-to-noise ratio usually leads to a sharp rise in nonlinear distortions at high sound pressures. Thanks to the innovative design of the C928 MEMS microphone, a distortion factor of only one percent is produced even at a sound level of 131 dB. That makes it equally suitable for recording extremely loud sound sources.

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