Music – Instruments – Electrical musical tone generation
Patent
1990-06-04
1992-01-07
Witkowski, Stanley J.
Music
Instruments
Electrical musical tone generation
84DIG24, G10H 318
Patent
active
050780417
ABSTRACT:
A suspension bridge pickup mechanism for stringed musical instruments. Vibrations from the strings are transferred to a suspended bridge which is in contact at spaced points with resonator plates of a plurality of bimorphic piezoelectric elements. The bridge has a high length to transverse thickness ratio resulting in a signal of wide frequency range and high amplitude. The tonal characteristics and the relative harmonic content of the signal can be altered by selecting or rejecting specific transducers which will contribute to the output signal utilizing a switching circuit. The transducers may be positioned under different portions of the bridge resulting in greater low frequency response in the median region of the bridge, maximal mid frequency response in the paramedian region, and maximal high frequency response near the ends of the bridge. Resonator plates of large area and small thickness are employed for maximal reproduction of low frequencies and resonator plates of small area and greater thickness are employed for maximal reproduction of high frequencies. The instrument strings cross and are supported by the bridge asymmetrically of its length.
REFERENCES:
patent: 4211139 (1980-07-01), Murakami
patent: 4228715 (1980-10-01), Nourney
patent: 4491051 (1985-01-01), Barcus
patent: 4567805 (1986-02-01), Clevinger
patent: 4632002 (1986-12-01), Clevinger
patent: 4697491 (1987-10-01), Maloney
patent: 4750397 (1988-01-01), Ashworth-Jones
Crandell Ralph F.
Witkowski Stanley J.
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