RPMmtr 4+

Name: RPMmtr
Price: 29 SEK
Rating: 1 (1 reviews)
Author: Andreas Bartl

Andreas Bartl

Designad för iPhone

- 1,0 • 1 betyg

- 29,00 kr

iPhone-skärmavbilder

Beskrivning

Engines, motors and rotating machinery generate periodic sound patterns. RPMmtr analyses those sound patterns to measure RPM (rotational speed) based on state-of-the-art signal processing technology.

The result of this estimation is shown in three different views. The tachometer view displays the rotational speed at a glance. The color of the dent indicates how clear the measurement is. You can swipe the red ring control and improve the result by specifying the expected RPM range.
The tracking view shows the evolution of the rotational speed over time. The accuracy of the measurement is indicated by the size and color of the circles.
Experts can use the spectrogram view: the graph shows the frequency distribution of the sound. Small arrows show the rotational speed. Adjust the axes scaling by a swipe with one finger.

Notice on usage:
The app can estimate the correct rotational speed only in cases if the sound is very clear (i.e. the rotating device generates clear periodic sound patterns with one frequency) and there is no background noise.
RPMmtr is for educational purposes only. We do not take responsibility for decisions taken by the reader based solely on the information provided in this app.

20 okt. 2021

Version 1.5

- Analysis quality warning
- Predefined suggestions for RPM ranges
- Correction factor for dominant harmonic order

1,0 av 5

1 betyg

iPhone 12mini, diesel Volvo.

Did not work at all on my car. When it fund rpm pattern it was of by 2000. Don’t know if it the phone or app.

Utvecklaren Andreas Bartl har angett att appens integritetsrutiner kan inkludera hantering av data enligt beskrivningen nedan. Det finns mer information i utvecklarens integritetspolicy.