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EMG Activity within the Pharynx during Speech Production

Arlene Tarlow
Temple University, Philadelphia, Pennsylvania

Mitchell Kwaterski
University of Wisconsin, Madison, Wisconsin

Electromyography (EMG) of the superior and middle constrictor muscles was recorded during phonated and whispered productions of the vowels /i/ and /a/ and the stop consonants /p/ and /b/ in VCVCV trisyllables. Lower levels of EMG activity were consistently associated with production of the voiced consonant /b/ than with comparable productions of the voiceless consonant /p/. Larger amplitude EMG signals were associated with vowel production than with consonant production. No systematic differences in muscle activity were observed as a function of phonated VS whispered productions. These findings are interpreted in relation to the active role of the pharynx during speech production.