Acoustic keyboard

Details Acoustic keyboard Acoustic keyboard

1983-10-31

1986-07-08

Caldwell, Sr., John W.

Communications: electrical

Audible indication

Percussion-type sound producer

178 17C, 340365P, 400477, H04L 100

Patent

active

045996075

ABSTRACT:
An acoustic keyboard comprises a plurality of keys arranged in a matrix. A plurality of reflector members, each one associated with a different one of the keys, reflect acoustic energy when the associated key is actuated. Acoustic energy is emitted from a transducer for reflection from the actuators. The reflected energy is detected, and the actuated key is identified based upon the transit time of acoustic energy from the transducer to the detector via reflection off of the reflector member associated with the actuated key.

REFERENCES:
patent: 3647962 (1972-03-01), Whetstone
patent: 3745564 (1973-07-01), Gandolfo et al.
patent: 4028619 (1977-06-01), Edwards
patent: 4311991 (1982-01-01), Rimbey
patent: 4317005 (1982-02-01), de Bruyne
patent: 4319189 (1982-03-01), Cullum, Jr. et al.
patent: 4379968 (1983-04-01), Ely et al.
patent: 4384633 (1983-05-01), Hoyer-Ellefsen
patent: 4384795 (1983-05-01), Lutes
`Electronic Keyboard`, R. R. Lisk, IBM Technical Disclosure Bulletin, vol. 20, No. 1, Jun. 1977.
`Acoustical Touch Panel`, J. Fajans, IBM Technical Disclosure Bulletin, vol. 20, No. 7, Dec. 1977.

Affiliated with

Also associated with

Rating

Acoustic keyboard does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Acoustic keyboard, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Acoustic keyboard will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1454212