Harmonics in a Closed Pipe

  • Thread starter alan4cult
  • Start date
  • #1
5
0

Main Question or Discussion Point

If you vibrate a tuning fork over a closed pipe (a pipe with one end closed and the other open) is it possible to get overtones in the pipe even thought the tuning fork only vibrates at one frequency
For example if you have a tuning fork of freq 300HZ and you allow it too vibrate above a closed pipe is it possible to get 3 times the frequency e.g. 900Hz?
 

Answers and Replies

  • #2
pam
455
1
Because of end effects, the pressure wave is not purely sinusoidal, leading to some overtones. That is why the sound from the pipe has a different quality than the pure tuning fork.
 
  • #3
5
0
Thanks for your reply. That is what I imagined. However wouldn't the overtones be very diminished? I mean would the fundamental frequency appear the loudest?
 
  • #4
Meir Achuz
Science Advisor
Homework Helper
Gold Member
3,523
107
The strength of the overtones would depend on the length/radius of the pipe.
A narrower pipe would have a purer tone, but even a low level of overtones can affect the quality of the sound.
 

Related Threads on Harmonics in a Closed Pipe

Replies
2
Views
929
Replies
3
Views
8K
  • Last Post
Replies
7
Views
2K
  • Last Post
Replies
9
Views
2K
  • Last Post
Replies
6
Views
2K
  • Last Post
Replies
2
Views
2K
  • Last Post
Replies
1
Views
1K
  • Last Post
Replies
7
Views
5K
Top