Questions tagged [nonharmonic]

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2 votes
0 answers
33 views

Event-related EEG (epoch averaging) as a form of inter-harmonic bandstop filtering?

There is a matter that comes to my mind from time to time, now I describe it in detail. Anyway I am a first year PhD student, doing research in the field of cognitive neuroscience, but yet I only have ...
LimeAndConconut's user avatar
1 vote
1 answer
426 views

Harmonic Product Spectrum from FFT output to the fundamental frequency

I'm trying to do the HPS algorithm on my FFT output, but I'm stuck here. My signal is from a bass (cable), 16bits, 48.000Hz. I split in time domain the array of the whole record into multiple arrays ...
Meliodas's user avatar
0 votes
2 answers
239 views

How to avoid overtones in audio signal

I'm trying to make a program that catch and audio signal of a bass and show the notes that have been played. My program: Gets the sound and put it in a double data type array. (48 000Hz, 16bits) ...
Meliodas's user avatar
0 votes
2 answers
122 views

Intermittent Harmonics, Is there a physical explanation?

I am doing some frequency analysis of a vibration signal from a spinning rotor, I am expecting to see peaks corresponding to the rotational frequency of the rotor. So the fundamental frequency ...
Stephen Jackson's user avatar
0 votes
1 answer
2k views

Harmonics of square wave [closed]

I have a square wave, with 10% duty cycle. It is 90ms LOW, 10ms HIGH. Sampling frequency is 1kHz. In spectral domain, after following this example, I get fundamental frequency (10Hz), as well as its ...
aaaaa says reinstate Monica's user avatar
2 votes
1 answer
164 views

Why harmonic components appear only after a certain level when a signal is clipped?

I recently observed this phenomenon that when a signal is clipped the harmonics start to appear only after a certain level. The Python code to reproduce the effect is given below. The signal has 3 ...
Sajil C K's user avatar
  • 149
6 votes
1 answer
324 views

How to detect specific behavior in time series?

I was not quite sure what the right SE for this was, so I posted this also here on SciComp. Please tell me which one to remove :) Problem statement I have a few hundred unrelated time series, say $...
Rody Oldenhuis's user avatar
0 votes
0 answers
95 views

Period of non-harmonic Fourier sum

I am wondering if there is a formula for the period of the sum of $N$ cisoids of the form $e^{j\frac{2\pi}{N} i\, \omega_k}$ where the frequencies $\omega_k \in \left[-N/2,N/2\right]$, $k=0,\ldots,N-1$...
Arrigo's user avatar
  • 506