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Results tagged with wave
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user 21048
2
votes
How to calculate the phase difference between two squarewaves of same frequency but differen...
specifically phase is used as an alternative to the time delay between the two waveforms, converting time delay to phase using:
$$\theta = 2\pi f \tau$$
Where $f = 1/T$ as the frequency of the square wave …
- 55k
0
votes
How to Extract a Period of a Periodic Pulsed Signal?
The autocorrelation will reveal the period. It will be max at delay = 0 but then will peak again at the offsets where the waveform repeats.
- 55k
1
vote
Accepted
Playing sounds with only one frequency at a time
Yes, as long as we are also allowed to vary the amplitude versus time and we're allowed any time period in which to change frequency. Any single valued waveform can also be described in terms of insta …
- 55k
1
vote
How to obtain the wave height "H" /wave period T from the spectral density S(f)
The power spectral density (PSD) is the power over a given resolution bandwidth (for example, within 1 Hz of bandwidth when the units for the PSD are given in "per Hz", such as a phase power spectral …
- 55k
1
vote
Accepted
frequencies in sound: multiple possibilities?
The Discrete Fourier Transform, or DFT (the FFT is an algorithm that computes the DFT) of a length of finite duration (which any practical transform would need to be) is identical to the result of the …
- 55k
0
votes
Accepted
Resampling to the same sample rate via Python
There is no problem with the resample command of sampling to the same sampling rate, and the 1 count error is simply due to rounding with the 16 bit precision used. Zooming in on an example audio trac …
- 55k
0
votes
Accepted
Why does a wave composed of two waves have an FFT with only one peak?
The generalized form $Ae^{j\theta}$ with $A$ and $\theta$ as real numbers is a phasor with magnitude $K$ and angle $\theta$. A "positive" frequency $\Omega_o$ is such a phasor with constant magnitude …
- 55k
1
vote
What causes the mismatch between a calculated sine wave and a measured sine wave?
Given the offset is exactly 256+/-1 and not occurring on every value suggests the 8th bit in from the LSB is stuck, always 0 or always 1 on one of the waveforms so that the resulting error is 256. Re …
- 55k