Pipes by Michael42er

Wed, 16 May 2012

Michael42er has uploaded a new video, this time showing his take on the corrugated card pipes. The thing that interested me was that he made two pipes, both the same size but from different types of card and the pitch from each is totally different. Weird.

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Comments (2)

  • michael42er May 18, 2012 at 11:47 am

    Thank you for your interest.

    Thank you for your interest. I think the sounds are dependent on the type and strength of the carton. Also the tolerances in the construction of the air gap and the air edge (labium) to vary the sound.

    Michael

    • RickTomlinson May 21, 2015 at 6:37 pm

      My wife (a card-carrying

      My wife (a card-carrying physicist) explains that the pitch is a function of a standing sound wave within the body of the pipe. So it would be strongly affected by even small variations in size and ratio (such as those caused by differing card thickness) as well as by the stiffness of the material.

      An insert with adjustable depth at the end of the tube (rather than a simple cap, as in the existing plan) should make fine tuning possible. Ideally, the insert will be airtight, otherwise it should perhaps be adjustable by a rod or tab that protrudes through the end-cap. Now I'm off to my "lab" to play with this idea.

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