Publications 

David J. Zajac, Ph.D. 

Journal Articles (in chronological order)

1.      Zajac, D.J., & Linville, R.  Voice perturbations of children with perceived nasality and hoarseness. Cleft Palate Journal, 26:226-231, 1989.

2.      Zajac, D.J., & Yates, C.  Accuracy of the pressure-flow method in estimating induced velopharyngeal orifice area:  Effects of the flow coefficient. Journal of Speech and Hearing Research, 34:1073-1078, 1991.

3.      Fornataro, L., & Zajac, D.J.  Aerodynamic characteristics of tracheostomy speaking valves.  Journal of Speech and Hearing Research, 30:529-532, 1993.

4.      Vig, P., & Zajac, D.J.  Age and gender effects on nasal respiratory function in normal subjects. Cleft Palate-Craniofacial Journal, 30:279-284, 1993.

5.      Zajac, D.J., Farkas, Z., Dindzans, L., & Stool, S.  Aerodynamic and laryngographic assessment of pediatric vocal function. Pediatric Pulmonology, 15:44-51, 1993.

6.      Zajac, D.J.  Laryngeal airway resistance in children with cleft palate and adequate velopharyngeal function. Cleft Palate-Craniofacial Journal, 32:138-144, 1995.*

7.      Warren, D.W., Mayo, R., Zajac, D.J., & Rochet, A.  Dyspnea following experimentally induced increased nasal airway resistance. Cleft Palate-Craniofacial Journal, 33:231-235, 1996.

8.      Zajac, D.J., & Mayo, R.  Aerodynamic and temporal aspects of velopharyngeal function in normal speakers. Journal of Speech and Hearing Research, 39:1199-1207, 1996.*

9.      Zajac, D.J., Lutz, R., & Mayo, R.  Microphone sensitivity as a source of variation in nasalance scores.  Journal of Speech and Hearing Research, 39:1228-1231, 1996.*

10.  Zajac, D.J., Mayo, R., Kataoka, R., & Kuo, J.  Aerodynamic and acoustic characteristics of a speaker with turbulent nasal emission: A case report. Cleft Palate-Craniofacial Journal, 33:440-444, 1996.*

11.  Kim, J.R., Zajac, D.J., Warren, D.W., Mayo, R., & Essick, G.  The response to sudden change in vocal tract resistance during stop consonant production. Journal of Speech, Language, and Hearing Research, 40:848-857, 1997.

12.  Zajac, D.J.  Velopharyngeal function in young and older adult speakers: Evidence from aerodynamic studies. Journal of the Acoustical Society of America, 102:1846-1852, 1997.*

13.  Mayo, R., Warren, D.W., & Zajac, D.J.  Intraoral pressure and velopharyngeal function. Cleft Palate-Craniofacial Journal, 35:299-303, 1998.

14.  Zajac, D.J.  Effects of a pressure target on laryngeal airway resistance in children. Journal of Communication Disorders, 31:201-213, 1998.*

15.  Zajac, D.J., Mayo, R., & Kataoka, R.  Nasal coarticulation in normal speakers: A re-examination of the effects of gender. Journal of Speech, Language, and Hearing Research, 41:503-510, 1998.*

16.  Hammond, C., Warren, D.W., Mayo, R., & Zajac, D.J.  Respiratory responses to sudden pressure venting during stop consonant production. Folia Phoniatrica et Logopaedica, 51:250-260, 1999.

17.  Zajac, D.J., Fornataro-Clerici, L., & Roop, T.  Aerodynamic characteristics of tracheostomy speaking valves: An updated report. Journal of Speech, Language, and Hearing Research, 42:92-100, 1999.*

18.  Bloom, K., Zajac, D.J., & Titus, J.  The influence of nasality of voice on sex-stereotyped attributions. Journal of Nonverbal Behavior, 23:271-282, 1999.

19.  Zajac, D.J.  Pressure-flow characteristics of /m/ and /p/ production in speakers without cleft palate: Developmental findings. Cleft Palate-Craniofacial Journal, 37:468-477, 2000.*

20.  Kataoka, R., Warren, D.W., Zajac, D.J., Mayo, R., & Lutz, R.  The relationship between spectral characteristics and perceived hypernasality in children. Journal of the Acoustical Society of America, 109:2181-2189, 2001.

21.  Kataoka, R., Zajac, D.J., Mayo, R., Lutz, R., & Warren, D.W.  The influence of acoustic and perceptual factors on perceived hypernasality in the vowel /i/: A preliminary study. Folia Phoniatrica et Logopaedica, 53:198-212, 2001.

22.  Smith Hammond, C., Goldstein, L., Zajac, D.J., Gray, L., Davenport, P., & Bolser, D.  Assessment of aspiration risk in stroke patients with quantification of voluntary cough. Neurology, 56:502-506, 2001.

23.  Young, L., Zajac, D.J., Mayo, R., & Hooper, C.  Effects of vowel height and vocal intensity on anticipatory nasal airflow in individuals with normal speech. Journal of Speech, Language, and Hearing Research, 44:52-60, 2001.*

24.  Zajac, D.J., & Hackett, A.  Temporal characteristics of aerodynamic segments in the speech of children and adults. Cleft Palate-Craniofacial Journal, 39:432-438, 2002.*

25.  Agarwal, T., Sloan, G.M., Zajac, D.J., Uhrich, K.S., Meadows, W., & Lewchalermwong, J.A.  Speech benefits of posterior pharyngeal flap are preserved after surgical flap division for obstructive sleep apnea: Experience with division of 12 flaps. Journal of Craniofacial Surgery, 14:630-636, 2003.

26.  Zajac, D.J, & Weissler, M.  Air pressure responses to sudden vocal tract pressure bleeds during production of stop consonants: New evidence of aeromechanical regulation. Journal of Speech, Language, and Hearing Research, 47:784-801, 2004.*

27.  Bundy, E., & Zajac, D.J.  Estimation of transpalatal nasalance during production of voiced stop consonants by non-cleft speakers using an oral-nasal mask. Cleft Palate-Craniofacial Journal, 43:691-701, 2006.*

28.  Gross, R., Steinhauer, K., Zajac, D.J., & Weissler, M.  Direct measurement of subglottic air pressure while swallowing. The Laryngoscope, 116(5):753-761, 2006.

29.  Zajac, D.J., Roberts, J., Hennon, E., Harris, A., Barnes, E., & Misenheimer, J.  Articulation rate and vowel space characteristics of young males with fragile X syndrome:  Preliminary acoustic findings. Journal of Speech, Language, and Hearing Research, 49:1147-1155, 2006.

30.  Mandulak, K.C., & Zajac, D.J.  Effects of altered fundamental frequency on Nasalance during vowel production by adult speakers at targeted sound pressure levels. Cleft Palate-Craniofacial Journal, 46:39-46, 2009.

31.  Zajac, D.J., Harris, A.A., Roberts, J.A., & Martin, G.E. Direct magnitude estimation of articulation rate in boys with fragile X syndrome.  Journal of Speech, Language, and Hearing Research, 52:1370-1379, 2009.

 

Book Chapters

  1. Zajac, D.J., & Yates, C. "Speech Aerodynamics," in M. Ball and C. Code (eds.), Instrumental Clinical Phonetics, pp. 87-118.  Whurr: London, 1997.*
  2. Zajac, D.J. "Speech Aerodynamics of Cleft Palate," in A. Kummer (ed.), Cleft Palate and Craniofacial Anomalies: Effect on Speech and Resonance, pp. 331-358. San Diego: Singular Thomson Learning, 2001.*
  3. Sloan, G., & Zajac, D.J. "Velopharyngeal Dysfunction," in S. Mathes (ed.), Plastic Surgery, 2nd Edition, Volume 4, Pediatric Plastic Surgery, pp. 311-337. Philadelphia: Saunders Elsevier, 2006.*
  4. Zajac, D.J. "Speech Aerodynamics,” in A. Kummer (ed.), Cleft Palate and Craniofacial Anomalies: Effect on Speech and Resonance, Second Edition,  pp. 415-445. San Diego: Singular Thomson Learning, 2007.*
  5. Zajac, D.J., Warren, D.W., & Hinton, V. “Aerodynamic Assessment of Motor Speech Disorders,” in M. R. McNeil (ed.), Clinical Management of Sensorimotor Speech Disorders, Second Edition, pp. 64-79. New York: Thieme, 2009.
  6. Zajac, D.J.  "Evaluation and Management of Speech Disorders for the Patient with Cleft Palate," in R.J. Fonseca, R. Marciani, T. Turvey (eds.), Oral and Maxillofacial Surgery, Second Edition, Volume III, pp. 791-805. St. Louis: Elsevier, 2009.†

 

* Work supported in whole or part by NIH Grants R29/R01 DE10175, Speech and Respiratory Aerodynamics in Cleft Palate.

† Work supported in whole or part by NIH Grant R21 DE018120, Early Assessment of Infants with Cleft Palate Following Surgical Repair.

 

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Last updated: 11/17/09