| 摘要 |
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.
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