Frequency measurement app 25

It is a tool designed to measure the frequency of sound sources with a constant frequency, such as belt tension measurement. The tool also displays the scale (just intonation).

Operation explanation:

1. Press the "Start" button to begin collecting sounds.
   • The waveform of the collected sound is displayed in gray at intervals of 200ms (0.2 seconds).
2. Detect a constant frequency.
   • Displays 6 wavelengths of the detected constant frequency waveform in red. This feature allows you to visually verify the accuracy of the measured sound.
   • The frequency and scale are shown at the top of the screen.
   • You can tap on the measured waveform to zoom in/out and scroll.
3. The measurement results are listed on the right side, alongside the display of average value.
   • Up to 10 lists are saved, and they are automatically deleted from oldest to newest.
   • Press the "CLEAR" button to remove all list data.

The following settings can be adjusted:

1. "upside down"
   • The screen flips upside down.
   • When inverted, you can measure with the call port facing upwards.
2. "Continuous measurement"
   • Continuously record and measure the waveform.
3. "Automatic extremum calculation"
   • The extreme value of the waveform is automatically calculated.
4. "Extreme judgment threshold"
   • If automatic extremum calculation is disabled, extremums are calculated based on the set value.
5. "Dumping parameter"
   • Easier detection of frequency even when volume is attenuated, such as during sound impacts.
6. "Average number"
   • Set the number to average measured raw waveforms for better results. Decrease for higher frequencies and increase for lower frequencies.

The detectable frequency typically ranges between 70-2000Hz.

Note:This tool utilizes the recording function of Android. However, the precision of measurements may vary across different models; hence, we do not provide a guarantee of measurement accuracy.