Tuning a 23.75" Pipe for 311 Hz - Questions for Brian

[BHarvey]

I have a closed end tube that is 23.75" in length, .905" in OD and .222" in ID.

What I am trying to do is replicate what is done on an organ flue pipe with an adjustable length collar and try to tune the pipe for a certain frequency.

My collar ID is .905" or .683" larger than the tube's hole.

The tube resonates at about 311 hz.

My questions are

Is the aperture too big?

Will a tuning fork work to find the most resonant point while sliding the collar out, similar to a resonance tube?

Thanks so much.

Brian

 

[LightHero]

No, the aperture is not too big. You could use a tuning fork to find the most resonant point while sliding the collar out, similar to a resonance tube. This will help you adjust the length of the tube to achieve the desired frequency.

 

[astrokreng]

, your approach to tuning the pipe is definitely on the right track. In order to tune the pipe to a specific frequency, you will need to adjust the length of the pipe or the size of the aperture. In this case, it seems like you are trying to adjust the size of the aperture with the adjustable collar.

To answer your first question, the aperture size may be too big. In order to achieve a specific frequency, the size of the aperture should be carefully calculated based on the length and diameter of the pipe. If the aperture is too large, it may not produce the desired frequency. I would recommend consulting a reference or a formula to determine the optimal aperture size for the desired frequency.

As for your second question, using a tuning fork to find the most resonant point while sliding the collar out can be a useful method. However, keep in mind that the tuning fork itself may have slight variations in frequency, so it may not be as accurate as using a frequency analyzer. Additionally, the shape and material of the tuning fork may also affect the resonance of the pipe. It may be helpful to use multiple tuning forks or to use a frequency analyzer to ensure the most accurate tuning.

Overall, your approach to tuning the pipe is a good starting point. Just make sure to carefully calculate and adjust the aperture size and consider using a frequency analyzer for the most accurate results. Good luck with your experiment!