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14 votes
10 answers
8k views

Why does a capacitor act as a frequency filter?

What is it about a capacitor which allows it to filter frequencies? I understand the construction of a high-pass RC filter, and the mathematics behind it, but I'm struggling to find an explanation of ...
gingerbreadboy's user avatar
2 votes
1 answer
1k views

Larsen effect and pitch of sound

Why Larsen effect produces always high pitched sounds, never low pitched?
Anarchasis's user avatar
  • 1,343
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 ...
Danny Rancher's user avatar