Android app spectrum analyzer

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#8
Well done. I'll be interested to see your results. The idea crossed my mind a while ago, I contacted one of the app providers, but they were doubtful as to whether my phone's software would be up to the task, that didn't make much sense to me. They weren't very helpful. Good luck
 
#12
With calibration and raw mic input even an ordinary Android phone turns to a fairly decent spectrum analyzer, because longer averages cancel out the errors caused by a small microphone.

I'm developing myself, as a hobby project, yet another free Spectrum Analyzer app for Android called Audizr. Please, download the app from https://play.google.com/store/apps/details?id=audizr.android or searching "Audizr" from Google Play with your phone, and test it out.
I warn you, there is a tiny ad on the bottom of the screen - you have to monetize your projects somehow, don't you 🙂

It doesn't have calibration feature yet, but I'll implement it later. What do you think about the app? What is missing?
 
#13
Audizr is pretty cute. A few features that would be helpful-
1) as you say a calibration process. if one could upload the calibration with your specific hardware (phone etc.) it would be interesting to see how uniform phones are. The MEMs mikes are supposed to be within 1 dB or better from sample to sample.
2) A weighted spl (its easy to get into Leq etc. but few would understand what that is)
3) CCIR spl, which better matches human hearing at low levels.
4) Level vs. time plot.

One interesting thought would be to turn old phones into remote monitored SPL meters for things like traffic and noise monitoring. Adding a web interface of some sort would make it possible to do a number of interesting things.
 
#15
1audio said:
Audizr is pretty cute. A few features that would be helpful-
1) as you say a calibration process. if one could upload the calibration with your specific hardware (phone etc.) it would be interesting to see how uniform phones are. The MEMs mikes are supposed to be within 1 dB or better from sample to sample.
2) A weighted spl (its easy to get into Leq etc. but few would understand what that is)
3) CCIR spl, which better matches human hearing at low levels.
4) Level vs. time plot.

One interesting thought would be to turn old phones into remote monitored SPL meters for things like traffic and noise monitoring. Adding a web interface of some sort would make it possible to do a number of interesting things.
Click to expand...

Thanks for your input, I'll definitely implement various weighings at some point. A calibration process is in progress right now, and I hope I'll have something to show you guys next week.

gkh said:
One nice addition would be an integrated pink noise generator. Then one would need just a breakout adaptor for a fully portable analizer 🙂
Click to expand...

Added it to my TODO list 🙂
 
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