Harmonicity Meter
Harmonicity is a measure of the sound energy in the harmonics relative to the rest of the spectrum. Harmocity varies with age, gender & which vowel you pronounce. Higher harmonicity values indicate a purer sound. Whilst lower jitter and shimmer values indicate a purer sound.
This meter is supposed to be used with a continuous consistent sound, e.g. Pronoucing a vowel, or a tone from a speaker/instrument. Rapidly changing tone/sound will give nonsensical output. FOR INDICATION ONLY. Harmonicity will vary depending on how close the source is to the microphone. Microphone sensitivity varies with frequency and from device to device. Even amoungst scientific literature, it is difficult to find consistency in absolute reported values.
Jitter is a measure of the frequency variation of the sound. The relative jitter is shown as a %.
Shimmer is a measure of the amplitude variation of the sound. The relative shimmer is shown as a %.Autodetects sound – App will only start measuring when a sound is detected.
Averaging
- After 0.7s, the app will start averaging the Harmonicity, Jitter, Shimmer and freqency values. This will continue until the sound is stopped at which point the last 0.7s of data is removed from the averaged values.
Musical Note – The current detected frequency is converted into a note based on western 12 tone equal temperament. Use to tune your guitar or other instrument if you wish.
Pause button – Useful if in a noisy environment and measurement doesn't auto stop.
FFT Spectrum – Autoscaling Sound Intensity between 0 and 2 kHz.
Range: 100 Hz to 2 kHz fundamental harmonic frequency detection.
Internet Permission is for link to website with more info/user guide for app.
Technical bit:The fast fourier transform (size 8192) is performed on the last 0.74s of data to produce a frequency spectrum (0 to 5.5 kHz with 1.35Hz resolution). This frequency spectrum is windowed between 100 and 4 kHz with linear fall offs to zero at 50 and 5 kHz. The fundamental frequency is determined from polynomial fitting to peaks. The harmonic energy is determined from the sum of the FFT signal at the harmonic freuquency plus 8 Hz either side. The noise is the sum of the rest of the FFT. The ratio of harmonic to noise energy is the Harmoicity and is displayed in decibels.
More technical details can be found on the website.
Category : Music & Audio
Reviews (17)
Very useful. Simple to use and accurate.
The best app for sound test.
Just use this for the fun of it. Just a well-detailed app.
1 more
Removed unnecessary permissions! Awesome! Also an excellent app that does exactly what it claims. Thank you, developers!!
Wow i have been searching for this kind of for ages thank you Kewl
Keulsoft just makes awesome apps. Period. No ads. No battery hog. The name says it all. If electronics interest you then these measuring apps from Keulsoft will intrigue you.
Cool and fun, maybe a bit of delay though.
Doesn't always start up Would give 5 otherwise
Keuwlsoft makes one of the best apps out there!
Just the perfect app to do the job, but... I thought, I were able to sing a note. My god, I have plenty of room to imprve myself. That teacher is just mercyless :-(
All of keuwl's apps are awesome. Really. Thank you.
Accurate and easy
another 5* app
This app is not functionig on my samsung s3
👍👍👍👍👍👍👍 best
This is so good because it will give you one hz number only. No numbers jumping all over the place. Good for a simple mind like I have. It will not give a reading at all if the tone is not pure and clean. Good for me looking into chakra healing sounds. So if there's no reading, the tone is poor quality or dirty, and best of all, I've found it to be accurate to within 1 Hz.