- cross-posted to:
- hardware@lemmit.online
- cross-posted to:
- hardware@lemmit.online
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The frequency response leaves much to be desired for anyone who likes modern music. Lack of low end and unstable High end wont make it an attractive product for many.
https://www.anandtech.com/show/15894/xmems-announces-worlds-first-monolithic-mems-speaker
Cool! I remember getting excited about their first gen 3 years ago, but the only reasonably priced productisation on their website only just went on preorder
The key development made by xMEMS is the company’s ultrasonic amplitude modulation transduction. The speaker can generate ultrasonic sound pulses which are then pushed to a demodulator to transform the sound pulses into audible sound for the user.
how does this ‘demodulator’ work? can someone ELI5?
my wild/ignorant guesses --> is this some sort of an ‘acoustic collimator’ or some mechanism that makes coherent soundwaves for amplification or something? do these devices exist? how do they work?
I’m not really sure, but at least with radio demodulation is done by taking a signal and multiplying it with another signal close in frequency, which generates a low frequency signal based on the difference in frequency of the two tones. Maybe it’s a similar thing with audio. Searching ultrasonic demodulation gave some papers that seem to talk about how to implement it but I didn’t get into reading them