Why Violin "F" HOLES are in This Shape?!

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Hi everyone!!! Today we'll be analyzing an interesting topic: the f-holes of the violin. These f-holes have evolved along with the instrument throughout its history.
If you want to learn how to draw and cut perfect f-holes for your violin, I recommend signing up for my ViolinMakingAcademy, where you can learn EVERYTHING about violin making
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Опубликовано:

18 апр 2024

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Комментарии : 16

@lozirullo 3 месяца назад

Nice explanation, tks a lot, very interesting even if I actually play guitar!

@tomerdvir2394 3 месяца назад

Thank you for this educational video, I have a dream to travel to Italy and come visit your shop !

@riangarianga 3 месяца назад

That was really interesting, thank you!

@anthonyb5279 3 месяца назад

I have stoped using F holes and instead ported the sides. It sounds fuller and much louder.

@Dansback21 3 месяца назад

Wonder which provides the best sound: f hole, c hole, or flaming sword hole?

@hellomate639 3 месяца назад

There's an MIT paper that showed that the overall perimeter length of the sound hole influences the volume pretty directly. The F hole is a very efficient shape with a very large perimeter for a small footprint on the sound board. Thinking further on the topic, a standing wave with walls on either side will be in integer wavelengths of the sound, and standing waves with an open end will have an extra half wavelength. What this means is that having some open vibration essentially allows the instrument to have a lower base set of harmonics. It should also increase the volume because the edge of the sound hole will be vibrating substantially, putting a lot of sound in the air. Notably, the wings on the F holes go with the grain, which is much stiffer, so the effect is that the overtones produced are higher. You can see experimentation on all sorts of viola da braccia/ viola d'amore where there is more cross-grain vibration. That's also what is notable about the C hole compared to the F hole - the flexing happens across the grain on a C hole, and the cross-grain flexion is a lot less stiff. I also suspect it is less energetically efficient, losing more energy per cycle. This isn't always bad if you want to soften the sound.

@disqusrubbish5467 3 месяца назад

Ha - I was about to post similar but you did a better job. The MIT guy researches acoustics in the ocean IIRC. He also says that f holes will be louder than circular of the same area. The sound happens in maybe the first 6 mm from the edge of the whole, and so there is a large area in a circular hole that isn't too productive.

@anthonyb5279 3 месяца назад

Yea I used to believe that. There are better ways to port the instrument than on the face. leave the face solid.

@hellomate639 3 месяца назад

@@disqusrubbish5467 This makes sense for a couple reasons (this is more conjecture than factual statement). One, like you mentioned, is the area. But the other one is the lengthwise holes maintaining lateral stiffness.

@riangarianga 3 месяца назад

Thank you for pointing this out. I found the paper, after giving it a quick overview I think it's really worth reading.