• Support PF! Buy your school textbooks, materials and every day products Here!

What is a method to find the fundamental frequency of a pipe

  • Thread starter Zoro
  • Start date
  • #1
18
0

Homework Statement



How can i find the fundamental frequency of a closed piep (measuring cylinder) experimentally/ physicaly. I have done the maths and found the frequency but i want another way to prove this other than simply playing the calculated frequency back at the measuring cylinder. I have heard of a method called overblowing or Helmholtz frequency and using a program named Audacity to find it but after further research, i think Helmholzt frequency can only be used on bottles where there is a "neck" or part with a smaller diameter at the top. Can i use Helholzt frquency/ overblowing?

Homework Equations




The Attempt at a Solution


I have already mathematically found the fundamental frequency
 

Answers and Replies

  • #2
963
213
How can i find the fundamental frequency of a closed piep (measuring cylinder) experimentally/ physicaly. I have done the maths and found the frequency but i want another way to prove this other than simply playing the calculated frequency back at the measuring cylinder. I have heard of a method called overblowing or Helmholtz frequency and using a program named Audacity to find it but after further research, i think Helmholzt frequency can only be used on bottles where there is a "neck" or part with a smaller diameter at the top. Can i use Helholzt frquency/ overblowing?
we used to do an experiment called resonance tube and finding the wavelength of sound waves by resonating the air column in atube -the tube length could be varied by a water head and level of water in the tube.
a tuning fork of known frequency would be brought vibrating above the air column and if the length matched the stationary wave formation a resonating sound will be heared the first resonance would be at lambda/4 and then its multiples.
i think a variation of this experiment can determine the frequency of a tube closed at one end.
 
  • #3
Tom.G
Science Advisor
3,054
1,805
Neck not required. For instance a spent .22 caliber shell casing makes an annoyingly piercing whistle when overblown; it does take a fair amount of lung power to accomplish though. It is even possible to excite an empty beer err soda bottle at double frequency, though again you do have to work at it.
 

Related Threads on What is a method to find the fundamental frequency of a pipe

Replies
2
Views
25K
  • Last Post
Replies
1
Views
9K
Replies
7
Views
916
Replies
9
Views
8K
Replies
5
Views
13K
Replies
1
Views
1K
Replies
5
Views
9K
  • Last Post
Replies
4
Views
10K
  • Last Post
Replies
1
Views
1K
Top