All Questions
Tagged with signal-processing acoustics
59
questions
1
vote
1
answer
99
views
Multilateration of Sound in 3D Space
TL:DR - How can you find the 3D coordinates of a emitter than transmits an impulse signal?
STORY:
I'm working on something to improve my bird-watching. I've got a camera that can take pictures of ...
- 111
3
votes
1
answer
70
views
Sound an amplifier makes when you plug / unplug a cable [closed]
When you plug, unplug or even touch a jack cable of an aplifying system with speakers, one can hear a low-pitch sound that is of roughly always the same frequency, which does not seem to depend on the ...
- 2,469
1
vote
2
answers
61
views
Recognizing speech at 1bit quantise depth?
i found on german wikipedia an audio example of 1 bit depth quantising, where the speech still can be recognized. how is it possible if at 1 bit depth we have just two values: "signal" and "no-signal"?...
- 11
0
votes
1
answer
124
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Acoustic power spectral density change due to diffraction
Say we have an acoustical point source emitting white noise - i.e., a power spectral density of $$S_x(f) = \frac{N_0}{2}$$ The source is embedded in the plane such that it radiates in half-space - i.e....
- 1,200
2
votes
1
answer
1k
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Larsen effect and pitch of sound
Why Larsen effect produces always high pitched sounds, never low pitched?
- 1,343
0
votes
1
answer
156
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Interpreting FFT background noice
There is some construction down my street and I think the drills are putting off a high pitch noise so I downloaded a spectrum analyzer. they have an FFT plot here:
The "57-dB-A" I guess is the ...
- 101
2
votes
7
answers
4k
views
Can human ear distinguish between sounds of different phase?
A noise cancelling headphone produces a sound that's out of phase with ambient noise, mixes them and hence cancels them.
But I wonder if we were to hear the 2 sounds which are out of phase to each ...
- 131
9
votes
4
answers
3k
views
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).
...
- 737
0
votes
1
answer
59
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Subtracting Audio from a Song with Multiple Forms
This question may start oozing into the realm of copyright infringement, but let's discuss the theory first and foremost.
I have a song with vocal and orchestral accompaniment from a well-known movie ...
- 109
1
vote
1
answer
337
views
Acoustical Design considerations for Active Noise Cancellation Project for Air vent [closed]
I am working on ''Active noise cancellation for air vent'' project. I am
using NI myRIO1900, Audio Technica ATR 3350 omni directional microphones
and Tevion Loudspeakers. I have done the programming ...
- 111
1
vote
3
answers
7k
views
Do electromagnetic waves produce sound?
Preamble:
At 5 AM in the morning, if I sit quietly and listen attentively, I can hear many different noises, on a very high frequency. If I try to isolate the ones that are less noisy, I can clearly ...
- 1,793
0
votes
1
answer
196
views
How can one change the virtual position of a sound source with a fixed array of speakers?
I have a question about signal processing:
How to make a person, sitting between array of two loudspeakers (one from the left and one from his right), hear the sound that came from both loudspeakers, ...
- 109
1
vote
2
answers
153
views
How do phase carries structural information about the function? [closed]
Suppose you are on a railway platform and you hear the sound of train coming towards you. Now, Using Fourier transformation we can convert the time domain function (here take sound as a function) ...
- 133
4
votes
1
answer
667
views
Significance of higher harmonics
I am analyzing a noise signal and have identified the fundamental frequency of a tone and it's higher harmonics. Say for example given the signal below,
The fundamental frequency has a sound pressure ...
- 41
1
vote
1
answer
170
views
Two superimposed sounds traveling through low- and high-density matter: is separation possible?
Two superimposed sounds (at source: $s(t) = s_1(t) + s_2(t)$; the two sound components overlap completely in time, partially in spectra) travel through low- and high-density matter and are recorded ...
- 113