3 Recording frequency

We can use our smartphones and record the frequency of the sound which is produced in our surrounding.

The following apps can be used,

https://sj.arduino.cc/

phyPhox (Perform physics experiments with your phone) - https://f-droid.org/packages/de.rwth_aachen.phyphox

gStrings

DaTuner Lite

Share your first observation. Also give a brief description of what you recorded?

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Here is graph of light whistling(without any instruments) captured by Arduino journal app,

IMG-S_4

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