2023-10-15 (Su) Phlute Measurements and experimentation

Bumbling around with wood and PVC was not getting me to the instrument I imagined, so I started to investigate scientifically. I had vivid memories of science labs from high school and university. I hypothesized that the factors determining tone were tube length, hole position, and barriers at the end.

I took my slide whistle, which already had a window, and drilled a 1/4" (6.35mm) hole three inches from the labium. I measured the frequency while the hole was covered and uncovered. The tub was 12" long. I trimmed it 1/2", measured the frequencies, then repeated until the tube was 4". I recorded the results and will make a table that plots frequency as a function of tube length.
Short tube and 1" scraps

I performed a similar test with a partially stoppered tube. This version gave me consistent results, whereas the entirely capped pipe in the previous example would occasionally emit a raspy sound with a weak tone. I recorded this experiment by writing the pitch on the segment and photographing it next to a ruler, indicating the length. In the later tests, when the tube was short, I got a different tone if I blew hard, so I recorded both.
Shortening and recording tone with partially stoppered end

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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