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The gestation of a harp

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Home Forums Forum Archives Amateur Harpists The gestation of a harp

Viewing 15 posts - 16 through 30 (of 64 total)
  • Author
    Posts
  • #155100
    Audrey Nickel
    Participant

    Just to add, there’s plywood and there’s plywood.

    #155101
    Karen Johns
    Participant

    I agree with Audrey- my Voyageur has the same sandwiching of cherry in both the neck and pillar, and each piece is at least a 1/2 inch thick. The soundboard plywood is very thin layers of aircraft birch.

    Karen

    #155102
    Liam M
    Participant

    It is intriguing Karen as I have been studying the theory of the wire harps, the thicker the sound board, the longer the sustain. What appears to heppen is the soundboard absorbs the energy that maintains the sustain. I have duplicated this with my brass soundboard experiments.

    #155103
    michael-rockowitz
    Participant

    Audrey,

    #155104
    michael-rockowitz
    Participant

    Audrey,

    Oops – I forgot to include the page with the picture of the plywood neck from Dreamsinger harps.

    #155105
    Karen Johns
    Participant

    Liam- Both of my current

    #155106
    Tacye
    Participant

    The tension is governed by the vibrating length of the string, which ends where the string enters the hole in the soundboard so string rib thickness should not affect the tension.

    #155107
    Audrey Nickel
    Participant

    That’s true, Michael…I’d forgotten about his mahogany harps.

    Audrey

    #155108
    michael-rockowitz
    Participant

    Tacye,
    I find myself wondering if your assertion is correct, that the vibrating length of the string on the harp “ends where the string enters the hole in the soundboard.”

    #155109
    michael-rockowitz
    Participant

    Hi to all-

    I just got my book written by Jerry Brown, on harp construction and design.

    #155110
    Tacye
    Participant

    Michael, you are confused with lateral and transverse vibrations.

    #155111
    michael-rockowitz
    Participant

    Hi Tacye,

    I am no physicist, nor an engineer, and unfortunately, my grasp of physics is not at all advanced.

    #155112
    bernhard-schmidt
    Participant

    Maybe we could come to the conclusion that we

    #155113
    Tacye
    Participant

    What I hope you are trying to express is that the boundary conditions for the string, which are assumed by simple theory to be perfectly rigid end points, cannot be so in practice (as the soundboard is moving or there would be no sound) and therefore objects beyond the main vibrating length of the string can have an effect on the vibration.

    #155114
    michael-rockowitz
    Participant

    Tacye and Bernhard,

    You both seem to be saying the same thing, and you both are far more expert in these matters than I am, so I am guessing that you are probably right, and I am mistaken.

Viewing 15 posts - 16 through 30 (of 64 total)
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