Frequency measurement tool

It is a tool to measure the frequency of sound source of constant frequency such as belt tension measurement.

Operation explanation
When you press the start button, measurement starts.
The waveform of the measured sound is displayed in gray (updated every time) at regular intervals (125 ms).
Upon detecting vibrations at regular intervals by internal processing,
The frequency (Hz) is displayed. (For reference, scale (Doremi is also displayed)).
In addition, the waveform when vibration is detected is displayed in red (fixed), and processing of vibration frequency
The maximum value used is displayed as a point.


(You can visually check if the measured sound is correct.)
Press the start button again to start the next measurement.
The detected frequency is added to the cumulative measurement value.
The cumulative measurement value holds the latest 10 cases and also displays the average value.


Adjust the measurement sensitivity with the sensitivity adjustment button.
As the sensitivity decreases, the change in the small sound is sensed.
(However, it makes it easier to pick up noise.)


Button Explanation
Start button: Start measurement.
Stop button: Cancels the measurement.
Clear button: Clears the cumulative measured value.
+ - Button: Adjust measurement sensitivity.

The detectable frequency is less than 400 Hz.


Note: This tool uses the recording function of Android,
Since it depends on the model, it does not guarantee the accuracy of the measured frequency.