2023-10-16 (M) Phlute More recorder recording

I have only used 1/2" schedule-40 pipe, so I bought a 3/4" thin-walled tubing. The weaker sides cut with less resistance, offered more internal volume, and were less expensive per foot than standard-duty pipe. I wanted to test if the wider tubes would provide a lower frequency than the same piece in a smaller diameter. I cut 20" (500mm) pieces in both sizes and carved labiums into each.

I started with the larger size and repeated yesterday's testing method with an open tube, partially blocked, capped, then trimming an inch. I jotted down the results until I got to 8" from labium to tip, where the primary frequency and the next most audible resonance fell close to the DTMF tones to transmit a 2. The decoder on my phone confirmed that when I blew on the open pipe, it detected the numeral. I stopped cutting that pipe and set it aside.

When I started the project, I wanted a double-necked flute that could emit any of the sixteen DTMF signals by careful finger placement, but that felt only possible with a lot more work. I would settle for twelve pipes that corresponded with a single character.
8" from labium to end in 3/4" thin-wall PVC acts like the 2 button on a touch tone phone

I continued my experimentation with the 1/2" pipe and found a few lengths that could generate two relevant tones depending on whether they were open, partially blocked, or capped. This tells me that I could use a moving valve to change the tone, and I would not have to carry as many instruments.

The most significant discovery was when I drilled into the cap. I did not expect any change with a 1/8" (3mm) hole, but I heard a clear tone and a higher frequency than before, and I needed some pitches over 1.2KHz. It was late in the day, so I could not experiment more with that technique.
Field notes

The rest of the posts for this project have been arranged by date.
First time here?

Completed projects from year 1
Completed projects from year 2
Completed projects from year 3
Completed projects from year 4
Completed projects from year 5
Completed projects from year 6
Completed projects from year 7
Completed projects from year 8
Completed projects from year 9
Completed projects from year 10

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