Abstract
In this paper, the results of the preliminary development of a visual speech display as a speech training aid for the hearing impaired will be presented. The training aid consists of analog electronics for extracting speech parameters and a microprocessor‐based system for converting the speech parameters to color parameters and for controlling the display parameters. The speech parameters consist of six spectral shape factors, similar to speech spectral principal components and a pitch signal proportional to voice fundamental frequency. The spectral shape factors are computed by appropriately combining the low‐pass‐filtered logarithmically scaled outputs of a bank of 16 bandpass filters. The spectral shape factors will be used to control the color of the display, and the pitch signal will be used to control “texture” in the display. The results of a vowel discrimination experiment for steady‐state vowels will be presented. [Work supported by the Whitaker Foundation.]
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