PMM-3738-WP-R

The Evolution of the High-Fidelity, Compact Microphone Delivered by PUI Audio Today’s Electronics Industry is filled with devices driven by voice —smartphones, headsets, tablets, laptops, wearables— designed for voice capture and voice control. Until today, these devices were built with capacitive MEMS microphones that operate on principles that were developed almost one-hundred years ago. Enter the piezoelectric MEMS microphone from PUI Audio: Instead following the design of traditional capacitive MEMS microphones, trapping air between layers, PUI Audio’s piezoelectric MEMS diaphragm travels freely with sound making for improved fidelity and noise-rejection. The full range PMM-3738-WP-R features a 100 Hz to 10 kHz frequency response to cover 95% of the audio band, while wind noise on the PMM-3738-WP-2-R is limited due to a smart 250 Hz roll-off — perfect for automotive and outdoor applications. Capacitive MEMS are also notorious for degraded performance due to dust and water ingress —losing up to 80% of sensitivity, if not failing completely. PUI Audio’s MEMS microphone is dustproof and waterproof (IP68 rated), without the use of performance degrading mesh, and is built with better unit-to-unit consistency for array applications. PUI Audio Piezoelectric MEMS Microphone Capacitive MEMS Microphone Fixed Backplate Moving Diaphragm Plates Incoming Sound Trapped Air Fixed Diaphragm Incoming Sound Specification PUI Audio Piezo MEMS Capacitive MEMS Results from using piezoelectric MEMS SNR ≥60 dB >61 dB Slated future designs go past 75 dB Size Ultra small Larger die Suited to flip chip PSRR -100 dB -70 dB Much better noise rejection Startup time 50,000µs 10,000X faster Particle Resistant Yes No Real-world reliability Sensitivity Drift None Yes Superior beam forming arrays IP68 Waterproof Yes No Only truly waterproof mic Air Shock Yes No Piezo design survives all phone drops Differential MEMS Yes No Native differential design for better performance