4 ms·
Which I suppose means they will also become microphones?
by elric 3y ago
Which I suppose means they will also become microphones?
- ben_w 3y agoSure, but the same can be said of the accelerometer and the camera — the question is "how good is it at this task?" rather than "can it be used for this task?"
- RugnirViking 3y agoif you could extract a best-guess from each one of these bad options and paired it up with some sensor fusion and signal processing you could probably improve the accuracy of whatever microphone is in there already and maybe even get some directional sound localisation going. Could be a fun research project
- visarga 3y agowifi sensing is also interesting, wonder what would come out of all of them together
- grandma_tea 3y agoCertainly not a good one.
- iefbr14 3y agoDepends where you stick them on. I am using them in my diy raingauges and one of my first prototypes had a too thin surface (where the raindrops fall on) causing a light rainshower on my graph when someone was talking within a metre or 2.
- refulgentis 3y agoYou're using microphones in DIY rain gauges? Interesting, what does it add?
- iefbr14 3y agoIt doesnt add anything. It replaces all mechanical stuff and makes the gauge maintenance free. An ESP8266 translates the sound of the raindrops to an amount. My first prototype is still running fine after 5 years outside.
- rollcat 3y agoPiezoelectric pickups are often used with stringed instruments, including classic/acoustic guitars, violas, cellos, etc. and sometimes also as one of the options in electric guitars (usually in addition to a couple of single or humbucker pickups). Their defining characteristic being a very "flat" response curve (second only to optical pickups, and much cheaper), they're appreciated in classical music, where accurate timbre reproduction is favored over giving an instrument "more color". What are the defining factors that would make such a microphone solution sub-optimal?
- alexjplant 3y ago> Their defining characteristic being a very "flat" response curve (second only to optical pickups, and much cheaper), they're appreciated in classical music, where accurate timbre reproduction is favored over giving an instrument "more color". I would heartily disagree. Every piezo pickup (undersaddle and body contact) I've ever used suffers from an inaccurate reproduction of the transients and over-emphasis of the midrange relative to the acoustic timbre of the instrument in question. Years ago the go-to solution to this was aggressive compression and parametric EQ - nowadays it's impulse responses. A microphone will always be more accurate relative to what's happening in the room. The problem is that microphones are less convenient than piezoelectric solutions because they suffer from bleed and can introduce feedback on loud stages. Piezoelectric pickups are certainly more broadband than magnetic pickups as far as frequency response which makes them more ideal for post-processing but it's patently untrue that they're more accurate than a conventional microphone.
- rollcat 3y ago> it's patently untrue that they're more accurate than a conventional microphone. My point of reference was a magnetic pickup, not a mic. I'm actually interested in why piezo mics would be a bad solution for a phone.
- pjc50 3y agoThe phone already has a microphone. The speaker is very unlikely to be coupled to a digital microphone input.
- maximus-decimus 3y agoCan't all speakers be used as a poor man's microphone?
- pjc50 3y agoIn a technical sense, yes, but you need to think about what's on the other side: there will be a piezo driver amplifier, which may be driven directly from a digital output such as I2S audio from the phone ASIC. Without some sort of preamp-ADC combination wired to the speaker, there's no way for software on the phone to use it as a microphone.