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What is involved in a typical repair?
Repairing
WHAT CAUSES A BUZZING SOUND WHEN THE KEY IS RELEASED?
Old, hardened, or crusty dampers are often the cause. Pictured are four wedge shaped damper felts that have been replaced with new damper felts. Exact size and shape of the new dampers are critical for proper dampening.
On upright pianos, sometimes much of the buzzing noise can be reduced by cleaning the face of the existing dampers. This was done on the square shaped treble dampers in this piano. However, these four tenor wedge shaped dampers were hard and crusty, not just dirty. - With grand pianos the face of the dampers are inaccessible for cleaning - replacement of the dampers felts is usually the only option. [HOME] [TOP OF PAGE]
What causes a buzzing sound as the key is released?
John S. Barford
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What is involved in a typical repair?
What causes a buzzing sound as the key is released?
WHAT IS INVOLVED IN A TYPICAL REPAIR?
In this first example, a note kept resonating after the key was released. The part responsible for muting the string is called the damper which is topped with a soft felt. It pivots at the flange and has a spring that pushes this felt against the string after the key is released.
As seen in the photo, damper flange (which accepts a screw and holds the damper in place) was split. A new flange was selected. The pivoting flange pin was extracted with the proper tool and a new pin of the proper diameter was selected, inserted and cut to length. The damper could now be reinstalled. [HOME] [TOP OF PAGE]
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