An Investigation into Machine Recognition of Vowel-Like Sounds and Their Allophones in One Syllable Words.
John Paul Hydinger, Frederick Michael Stubbs · Calhoun: The Naval Postgraduate School Institutional Archive (Naval Postgraduate School) · 1972
The goal was to recognize sustained vowel-like sounds and their allophones in one syllable words. A bank of filters and a digital sampler provided a data base for a polynomial curve fitting routine. The frequency range under investigation was 500-1000 Hz. A COMCOR CI 5000 analog computer and an XDS 9300 digital computer were used. Although coefficient correlation was ineffective, several recommendations for system improvement are made.