Sweep-tone vocal-tract spectra driven by an internal source
Christopher Wood · The Journal of the Acoustical Society of America · 1974
This paper was a one subject replication of the Fujimura and Lindquist study [J. Acoust. Soc. Am. 49, 541–556 (1971)] that measured vocal-tract transfer characteristics, except that instead of a transcutaneous external source, an internal source placed near the vocal folds was used. This internal artificial signal was generated using a locally modified Brüel & Kjaer model 4219 Artificial Voice. This transducer is encased in a container supplied with a conical throat connected to a 5-mm-diameter, 20-cm-long nasal catheter. This catheter was inserted through the nasal cavity to a point just above the glottis. An amplitude compressed and compensated sweep tone from 100 to 5000 Hz was used. The resulting articulated output was analyzed as a function of frequency using a high-speed pen recorder. Most of the articulations, as well as open and closed glottal conditions, studied by Fujimura and Lindquist were used in the present study and are compared and discussed.