All Questions
Tagged with signal-processing frequency
49
questions
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Integer multiples of fundamental time period? [closed]
If we define harmonics to be positive integer multiple of fundamental frequency
What will we say to positive integer multiples of fundamental period?
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2
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139
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Multiple frequencies [closed]
could someone please inform me how it is possible to send multiple frequencies down one wire? I’m referring specifically to a communication protocol known as HART. It seems they send a 4-20mA signal ...
- 29
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63
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Fourier Coefficients
Suppose i've a two voice samples v1 and v2. Comparatively voice v1 is louder than the v2. If both the voice is spoken by the same person.(Spoken normally as he speaks)
Is it good to state the ...
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-2
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3
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Does a 1 kHz signal have harmonics above or below 1 kHz, and where is its fundamental frequency?
I'm having an argument with a friend ─ he believes a 1 kHz audio signal has its fundamental frequency at 1 kHz with harmonics above that value, while I believe the fundamental frequency will be far ...
2
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3
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Use of negative frequency for the sake of simplifying mathematics?
How can we use the idea of negative frequency for the sake of simplifying mathematics if negative frequency does not exist (to my knowledge) in nature ? For example, when plotting the spectra of a ...
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1
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Larsen effect and pitch of sound
Why Larsen effect produces always high pitched sounds, never low pitched?
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5
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2k
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Existence of monochromatic pulses?
Why there can not be a monochromatic pulse? My physics professor told us that we can't generate a monochromatic light pulse and I was wondering what are the physical limitations causing this.
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4
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210
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An apparent contradiction in various explanations of frequency bands and data bandwidth
From wikipedia:
"A key characteristic of bandwidth is that any band of a given width can carry the same amount of information, regardless of where that band is located in the frequency spectrum. For ...
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9
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4
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3k
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Sound of a limited wave after removing main frequency?
From my old studies in signals I can remember that "a signal limited in frequency domain is unlimited in time domain" and viceversa (a signal limited in time domain is unlimited in frequency domain).
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1
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345
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Is this a frequency domain plot for audio? [closed]
I have a program "spectrum" that draws an chart for an audio file (a short .wav with an human voice recorded on it).
I believe it is a frequency domain chart.
The ...
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0
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2
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1k
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Why need for 96kHz, 192kHz audio? [closed]
Human can hear 20-20,000 Hz waves, so by Nyquist theorem it's sufficient to sample audio with 40 kHz. Indeed, 44.1 kHz widely used. But what do we need higher sample rates for? 96 kHz, 192 kHz are ...
user22330
4
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Image Reconstruction:Phase vs. Magnitude
Figure 1.(c) shows the Test image reconstructed from MAGNITUDE spectrum only. We can say that the intensity values of LOW frequency pixels are comparatively more than HIGH frequency pixels.
$$
f(x,y)=...
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3
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What does a constant signal sound like?
Say I was sampling a sound incorrectly and it produced a constant signal as below:
What would this signal sound like? In Matlab, it plays nothing. Is this correct?
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7
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Why can't you hear music well over a telephone line?
Why can't you hear music well well over a telephone line?
I was asked this question in an interview for a university study placement and I unfortunately had no idea.
I was given the hint that the ...
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6
votes
1
answer
1k
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Frequency shift without affecting signal length
Non-physicist here.
From what I've learned in university and what common sense says, a shift in frequency of a signal results in a change in its length in time. For example, if a sinusoid signal of ...
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