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High SNR MEMS Microphones: Revolutionizing the TWS audio experience

High SNR MEMS Microphones: Revolutionizing the TWS audio experience

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For those of us who can't go a day without our trusted earbuds, the pursuit of unparalleled audio quality is a top priority. With the advent of True Wireless Stereo (TWS), we have witnessed a remarkable shift in the way we experience music, breaking free from the limitations of wired connections. In this blog post, we will take a closer look at the groundbreaking influence of high Signal-to-Noise Ratio (SNR) MEMS Microphones on the audio landscape of TWS.

lowres-Close up of woman is using the black true wireless earbuds by hand to put in ear and control.jpg.pngTWS revolutionizes audio entertainment by wirelessly transmitting high-quality audio to earbuds via Bluetooth, eliminating the need for a wire connecting the two earbuds and allowing for a seamless audio experience free from the constraints of traditional wired setups. To meet the demands of everyday use, TWS earbuds require additional features. Transparent hearing, for instance, allows ambient sounds such as emergency sirens to be heard, enhancing a user’s environmental awareness. Similarly, active noise cancellation (ANC) reduces unwanted background noise, ensuring clear communication. These functionalities rely on high-quality microphones that capture and convert audio input into a digital format for electronic processing.

While hearing aids require a prescription from a medical professional, hearables are readily available devices designed to enhance everyday listening experiences. With the advantage of high production volumes, hearables are up to ten times less expensive, more aesthetically appealing, and smaller in size. Equipped with additional smart features, hearables can be an effective option to assist individuals with mild hearing loss without needing a medical diagnosis.

The cornerstone of a hearable is a high SNR microphone. The audio output quality improves as the SNR value increases, minimizing interference and noise. The latest generation of microphones, known as microelectromechanical system (MEMS) microphones, excel in capturing sounds with exceptional detail and high SNR. These microphones enhance the user's experience in ANC and audio pick-up quality without adding bulk to the design, thanks to their compact footprint. Additionally, MEMS microphones consume low power, contributing to extend battery lifetime for the device.

In fact, advancements in semiconductor technology allow seamless power mode switching, reducing the need for larger batteries and ultimately minimizing the overall size of the end product, or creating space for additional features and sensors. By analyzing its acoustic environment, MEMS microphones can seamlessly switch to different acoustic profiles by the System-on-Chip (SoC), ensuring the most optimal listening experience for users. Previously, power mode switching caused audible artifacts and interruptions of the signal stream.

Infineon’s XENSIV™ MEMS microphones are meticulously designed to capture audio with exceptional precision and quality, all in a compact package. They boast ultra-low self-noise (high SNR), minimal distortions (THD) even at high sound pressure levels (SPL), precise part-to-part phase and sensitivity matching, a flat frequency response with low LFRO (low frequency roll-off) and ultra-low group delay. These microphones, combined with selectable power modes and their small compact form factor deliver top-quality audio while keeping the device size to a minimum, revolutionizing our interaction with sound through wireless earphones, earbuds and hearables, including their potential for health applications.

For more information visit Infineon’s XENSIV™ MEMS microphones for consumer page at www.infineon.com/mems

Discover high-performance XENSIV™ MEMS microphones for active noise cancellation in this video: