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Thoughts on Soundboard Vibration

Thoughts on Soundboard Vibration

by Paul Wyszkowski

Originally published as Guild of American Luthiers Data Sheet #200, 1981



The classic guitar, like the harp but unlike the violin, the mandolin or the zither, has its strings attached directly to the soundboard. In the case of a violin, it is pretty clear that the bridge communicates primarily vibrations which are perpendicular to the surface of the soundboard. But it is not so obvious how the strings of a guitar transmit their vibration to the soundboard. However, a few minutes’ thought and a simple experiment can settle that question.

Back in 1954, J.K. Sutcliffe stated in an article in Guitar News that the fundamental action linking the string to the soundboard is the rocking of the bridge in response to the longitudinal (along the length) vibrations of the string. That is, the front and back edges of the bridge rise and fall as the string becomes tighter and looser (see Fig. 1). Later, Michael Kasha used this idea in his theory of guitar design. As a consequence, this view was accepted by many luthiers as correct.

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H.L. Wild

H.L. Wild

by Paul Wyszkowski

Originally published in American Lutherie #7, 1986 and The Big Red Book of American Lutherie, Volume 1, 2000

See also,
“Out of the Basement” by Richard Bingham
“A Scene from Dickens” by Steve Curtin



H.L. Wild: A curiosity shop, a preserved bit of the past still alive in Manhattan. Not a museum display, not a movie set, but a place where the antiques on the shelves are for sale not as such, but as current merchandise. A real time trip.

See it while it is still here. Buy some hundred-year-old veneer. Or pull together a guitar or a mandolin set from the stock of vintage woods and parts. Or you may find that this is the only place in the whole world which still has a supply of a particular fret-saw blade. Who knows what you may find here? Come on down!

Betty Wild, who has recently celebrated her sixty-second birthday, is the third generation of the Wild dynasty. Her grandfather, William Wild, founded H.L. Wild (just “H.L. Wild,” no “Company”) at its present address in Manhattan in 1876. (Where the initials “H.L.” came from is not clear, but apparently at least part of the reason for choosing them was aesthetic: “H.L. Wild” fits the mouth nicely.) The original business manufactured and sold intricate wooden fretwork construction sets for models of buildings, churches, towers, and various decorative objects. Jigsaw puzzles were another major product. A copy of the 1876 catalog depicting the many different designs then avail­able leans against the glass of a display case behind the counter. Betty shows it with obvious pride.

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Review: The Science of Sound by Thomas D. Rossing

Review: The Science of Sound by Thomas D. Rossing

Reviewed by Paul Wyszkowski

Originally published in American Lutherie #3, 1985 and Big Red Book of American Lutherie Volume One, 2000



The Science of Sound
Thomas D. Rossing
637 pages
Addison-Wesley Publishing Co., 1982
$76.70 from amazon.com (1999)

If you missed reading Tom Rossing’s articles on guitar acoustics in the GAL Quarterly, you may not know that he is a professor of physics at Northern Illinois University in DeKalb. His field of specialization is, as you may have guessed, acoustics and particularly musical acoustics. In fact, he has taught musical acoustics for over twenty years.

“This book,” says Tom in his preface, “is intended to be an introduction to acoustics written in nontechnical language, primarily for students without college level physics and mathematics.”

He notes that the word “sound” refers to two distinct phenomena: (1) the sensation of sound, that is, the conscious experience of hearing, and (2) vibrations in a physical medium which can cause the sensation of sound. (Making this distinction he points out, answers once and for all the old riddle: If a tree falls in a forest and there is no one to hear it, does it make a sound?)

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This article is part of our premium web content offered to Guild members. To view this and other web articles, join the Guild of American Luthiers. Members also receive 4 annual issues of American Lutherie and get discounts on products. For details, visit the membership page.

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