hammer

piano

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In piano
The hammers that strike the strings are affixed to a mechanism resting on the far ends of the keys; hammer and mechanism compose the “action.” The function of the mechanism is to accelerate the motion of the hammer, catch it as it rebounds from the strings,…
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In keyboard instrument: Principle of operation
…are struck by a felt-covered hammer that must rebound from the strings instantaneously or it will dampen their vibrations in the very act of initiating them. The hammer must thus be allowed to fly freely toward the strings. For the pianist to retain maximum control of loudness, the distance of…
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