Abstract
The amplitudes of fundamental and overtones of a steel string struck by a hammer as a function of time of contact. Vibration curves of a steel string struck by a tape-check system hammer taken from a piano were photographed and analyzed. The duration of contact between hammer and string was also measured photographically. The time of contact was varied by varying the striking position on the string and by varying the mass of the hammer. It was found that the amplitudes of the fundamental, the octave and the third harmonic were greatest when the time of contact was half the free period of vibration of the string.The factors which determine the choice of striking point are discussed.
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