Keyboard instrument

Details Keyboard instrument Keyboard instrument

1990-12-27

1992-02-11

Perkey, W. B.

Music

Instruments

Electrical musical tone generation

84DIG1, 181144, 181154, 381118, G10H 100, H05K 500

Patent

active

050866869

ABSTRACT:
Keyboard instruments incorporating sound systems for generating musical tones are disclosed. In a first keyboard instrument, speakers are mounted near a keyboard, and are arranged upright to be directed to the keyboard on the front side, thereby allowing a performer to clearly grasp the sound quality of performance tones. In a second keyboard instrument, which comprises a Helmholtz resonator consisting of a resonance port and a cabinet, an electro-acoustic transducer mounted on the outer surface of the cabinet and a driver for driving the transducer so as to cancel an air counteraction from the resonator, the size of a sound system is reduced, and the frequency characteristics, especially the low-frequency reproduction characteristics of the sound system are improved.

REFERENCES:
patent: 3064515 (1962-11-01), Markowitz
patent: 3643000 (1972-02-01), Andersen
patent: 3718747 (1973-02-01), Martin et al.
patent: 4058045 (1977-11-01), Jennings et al.
patent: 4133975 (1979-01-01), Barker, III
patent: 4206830 (1980-06-01), Sohma et al.
patent: 4329902 (1982-05-01), Love
patent: 4365113 (1982-12-01), Soma et al.
patent: 4413544 (1983-11-01), Sauvey
patent: 4601361 (1982-07-01), Nakada

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