![\"Cypress](\"https:\/\/www.stereoindex.com\/tech\/wp-content\/uploads\/2023\/11\/JDuicmyT.png\")
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\u201cBy shifting to a sound from ultrasound principle, the xMEMS Cypress micro speaker can now officially replace traditional coil-and-magnet speakers in active noise canceling earbuds,\u201d said Mike Housholder, Vice President, Marketing & Business Development for xMEMS. \u201cCypress maintains all of the benefits of xMEMS\u2019 existing speakers, while being 40x louder in low frequencies, achieving a key requirement for ANC earbuds.\u201d<\/em><\/p>\n Legacy coil speakers generate sound in the audible band, which is intrinsically inefficient. Cypress takes advantage of the characteristics unique to MEMS\u2014speed, precision, and uniformity\u2014to produce high-resolution audio more efficiently.<\/p>\n Sound from ultrasound has been a research topic since the 1960s but has never achieved the acoustic performance required for broad commercial appeal, until xMEMS\u2019 Cypress.<\/p>\n As an air pulse generator, Cypress comprises: a modulator to generate an amplitude-modulated ultrasonic wave (carrier) that faithfully follows the amplitude of the intended audio signal; and a demodulator to synchronously demodulate the ultrasonic wave, transferring the acoustic energy down to the baseband, producing the intended audible sound as a result.<\/p>\n The sound envelope of ultrasonic pulses is an exact acoustic copy of the source signal, meaning across all frequencies, Cypress is more faithful to the original recording than current speaker technologies. As a result of its superior resolution in the time domain, Cypress can more accurately reproduce today\u2019s advanced sound formats, including high-resolution and spatial audio.<\/p>\n \u201cCypress not only revolutionizes how sound can be reproduced from an electric signal, but it also redefines how it should be reproduced,\u201d said Jemm Liang, xMEMS CTO.<\/em><\/p>\n Cypress leverages the same production-proven MEMS platform used for all existing xMEMS products and exploits all the benefits of xMEMS\u2019 established solid-state speaker designs when compared to legacy coil architectures, including:<\/p>\n Now Cypress, in a 6.3 x 6.5 x 1.65mm package (9mm-diagonal), brings the added and significant benefit of being 40x louder in low frequencies compared to xMEMS\u2019 prior generation speakers, providing stronger, deeper bass that is consistent with the best 10-12mm legacy coil speakers, including sound pressure levels (SPL) greater than 140dB as low as 20Hz*.<\/p>\n This additional low frequency SPL is most critical for ANC earbuds. With Cypress, xMEMS brings unique advantages over legacy coil to further improve ANC applications. Cypress\u2019 faster electrical-to-acoustic conversion can contribute to wider ANC bandwidth (i.e., extension of ANC to cancel higher frequency noise sources, like a crying baby). Plus, Cypress\u2019 near-constant electrical-to-acoustic conversion time (group delay), can reduce DSP filter complexity which, in turn, leads to shorter DSP latency, rounding errors, and power consumption when processing ANC.<\/p>\n Full-function Cypress prototype silicon is now sampling to select early customers. Production-candidate samples of Cypress and the companion Alta controller\/amplifier ASIC will sample in June 2024. Mass production is planned for late-2024.<\/p>\n","protected":false},"excerpt":{"rendered":"How Cypress Creates the World\u2019s Best Audio Experience <\/strong><\/h3>\n
Based on Proven Innovation in MEMS Design<\/strong><\/h3>\n
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MEMS and Ultrasonic Modulation Ideal for ANC Performance<\/strong><\/h3>\n
Availability<\/strong><\/h3>\n