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Signal Processing

Questions tagged [octave]

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An octave is the interval between one musical pitch and another with half or double its frequency.

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I have a 1 KHz tone playing at 85 dBSPL which is monitored on a real time analyzer. I noticed that the level is just about 85 dBSPL on all settings of octave banding, ie, 1 octave all the way to 1/48 ...
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i read a binary measurement file. This have 457 blocks, every block have 31 values in (Pa)². The values are from a 1/3 octave spectrum. I dont know much about the 1/3 octave bands so i hope someone ...
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Some years ago, I had a little tool in FORTRAN and GNUplot output, which was able to plot the step response of an IIR lowpass filter, starting which the location of the poles. Now, this tool is lost ...
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I am comparing sos (cascaded 2nd order IIR) coefficients from my own implementation of a textbook method versus the coefficients that octave generates. Here is an snip of the octave code: ...
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i'm trying to implement SSB Modulation on Octave. i based my code on this: https://www.mathworks.com/help/signal/ug/single-sideband-modulation-via-the-hilbert-transform.html it works ok, until i ...
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I'm looking for the solution for decoding FM0 (bi-phase space) encoded signal from RFID tag. Response from the tag starts with preamble and then followed by 16 bit random number. Link rate is 40kHz. ...
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I have a complex signal and I'm trying to use Octave to plot a spectrogram. I found the specgram function, and it's close to what I want, but I can't figure out how to get it to display negative ...
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I have a one-third octave spectrum with 23 frequencies, and I want to use it as a frequency response to filter another spectrum, however that spectrum is specified linear with 2049 points. I know I ...
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I have an audio signal $g(t)$ composed by the sum of my original signal $f(t)$ and a delayed copy of itself: $$g(t)=f(t)+f(t+\varepsilon)$$ My goal is to recover the original signal $f(t)$ knowing: $...
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I have resolved peak locations using Octave findpeaks command: ...
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I'm trying to design a new filter with IIR to filter out specific bands. Basically it's a bandpass filter with 2 Octave or 3 Octave bandwidth but the filter order should be equal to 1/3 Octave filter. ...
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I'm quite new to signal processing and am trying to find the short time fourier transform of an audio sample and plot it (I believe the best way is as a spectogram?) using Octave (similar to this ...
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I am trying to find the reverberation time of a room using the Schroeder method (i.e., Reverse-time integration method). Therefore, impulse responses should be measured first. There are many ways to ...
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I'm not an expert so I'm not sure if this has a name associated with this phenomenon or not, so I'm not sure what to search for; Perhaps this can be answered by pointing to some literature which I am ...
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we have a signal recording and there are always interventions, I think it is not a noise, since it is not continuous but occurs in intervals, with 25 Hz (please see below). It is not affected by the ...
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