All Questions
Tagged with signal-processing acoustics
5
questions
36
votes
7
answers
12k
views
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 ...
- 499
6
votes
1
answer
1k
views
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 ...
- 171
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
2
votes
3
answers
522
views
Why does audio signal amplitude always fall off at higher frequencies?
In the frequency spectrum of every real audio sample that I've ever seen, the amplitude of the frequency components is always higher at low frequencies, then rapidly falls off at higher frequencies.
...
- 1,004
-2
votes
1
answer
2k
views
Why does a running fan causes some soundproofing in the room?
I notice that when I switch on my fan inside my room, the room becomes soundproof to a great extent to the outside noises. The greater is the speed of the fan, the greater is the soundproofing.
When ...
- 2,517