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Stringing by ear

I use a stethoscope to listen to frames while pulling tension. This is especially useful in diagnosing frames with integrity issues. If a crack is suspected, I can usually pass or fail the frame using the stethoscope. If I hear a noise that sounds like radio static while pulling tension, I can be pretty sure that something is wrong and the frame is breaking down. If I just hear a “swoosh” sound, the string sliding into place, I can be relatively certain that no issues are present. I listen during several pulls, especially those that are close to areas that I suspect. Sometimes a pull in the center of the frame will just “swoosh” while an outer pull, closer to a suspected crack, will provide a different noise indeed. (Hint: When listening to a frame with suspected issues, it is wise to wear safety goggles as your face is close to the possible weakened area.)

5 sets of Head FXP 16 to:

John Youngblood, Suwanee, GA

Editor’s note: Some combinations of string and grommets can create a real cacophony when pulling the center mains. Be careful not to mistake this for the sound of a broken frame. Also, check to see that the sound picked up by the stethoscope is not so loud that it damages your hearing.

See all articles by John Youngblood

From the April 2008 issue
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