Display device

Details Display device Display device

1983-05-05

1986-04-01

Brigance, Gerald L.

Communications: electrical

Land vehicle alarms or indicators

Internal alarm or indicator responsive to a condition of the...

340762, 340782, 381 48, G09G 128

Patent

active

045801339

ABSTRACT:
A display device for providing assistance in phonation training or the like has a microphone, comparators, latch circuits, and LED's. When a teacher produces reference sounds, his voice spectrum is displayed on a screen by red LED's, for example, and is continuously displayed until commanded otherwise. Then, a student practices and his voice spectrum is displayed on the same screen by green LED's. The student can repeatedly practice by erasing his voice spectrum until the two spectra coincide with each other. A teacher's voice spectrum may be stored in a ROM or the like in advance. When a student wishes to practice, the teacher's voice spectrum may be read out from the ROM and displayed on the screen. The student can then practice in a similar manner.

REFERENCES:
patent: 3595991 (1971-07-01), Diller
patent: 3881059 (1975-04-01), Stewart
patent: 4063035 (1977-12-01), Appelman et al.
patent: 4276445 (1981-06-01), Harbeson
patent: 4378466 (1983-03-01), Esser
Electronic Engineering, Dec. 1977, vol. 49, No. 600 Solid State Oscilloscope Using 10 LED Bars.

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