Abstract
Data were gathered on the changes in F0 which occur during bilabial closure in sequences of a vowel /a,u,i/ and a bilabial consonant /p,b,m/. Five male subjects produced several repetitions in a test phrase of each of the possible VC combinations. The period of subject's F0 was measured in real time using a laryngograph and a PDP-12 computer. F0 data for each VC sequence were synchronized on the period during which lip contact occurred, as determined by a pair of lip electrodes. The findings of this study replicate many earlier studies of such topics as intrinsic pitch of vowels (/u/ was highest and /a/ lowest) and corroborate many findings in the area of articulatory dynamics (e.g., F0 decreased sooner in /u/ context than for /a/ and /i/). Furthermore, several new observations are reported concerning the details of F0 fluctuation in the post-lip-closure periods when standard acoustic measurements would be difficult due to the low level of radiated energy. [Supported in part by grant GU-1508 to the Phonetics Laboratory, University of Texas.]
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