600 bps Voice digitizer. - George S. Kang; David C. Coulter (ICASSP, 1976)

Performance of LPC vocoders in a noisy environment. - Charles F. Teacher; David C. Coulter (ICASSP, 1979)

Operation of LPC vocoders in noisy environments. - Charles F. Teacher; David C. Coulter (ICASSP, 1981)

OMAR - A Haptic Display for Speech Perception by Deaf and Deaf-blind Individuals. - Silvio P. Eberhardt; Lynne E. Bernstein; David C. Coulter; Laura A. Hunckler (VRAIS, 1993)