Dr. David J Zajac BS, MA, PH.D.
Speech-Language Pathologist
101 BRAUER HALL CB # 7450 CHAPEL HILL NC, 27599About
Dr. David Zajac is a speech language pathologist practicing in CHAPEL HILL, NC. Dr. Zajac specializes in speech, language and swallowing disorders in patients. As a speech language pathologist, Dr. Zajac evaluates, diagnoses and treats patients with communication and swallowing troubles. These conditions may be due to developmental delay, brain injury, hearing loss, autism, stroke or other diseases and injuries. Dr. Zajac helps patients make sounds and improve their voices through various methods. Speech language pathologists also work with patients to strengthen muscles used to speak and swallow, and work with individuals and families to help cope with their conditions.
Provider Details
Expert Publications
Data provided by the National Library of Medicine- Estimation of transpalatal nasalance during production of voiced stop consonants by noncleft speakers using an oral-nasal mask.
- Effects of altered fundamental frequency on nasalance during vowel production by adult speakers at targeted sound pressure levels.
- Evaluating the spectral distinction between sibilant fricatives through a speaker-centered approach.
- Spectral analysis of word-initial alveolar and velar plosives produced by Iranian children with cleft lip and palate.
- The assessment of velopharyngeal function using nasal ram pressure testing following palatoplasty.
- Abrupt laryngeal engagement during stop plosive-vowel transitions in children with repaired cleft palate and adequate velopharyngeal closure: aerodynamic and sound pressure level evidence.
- Nasalance scores of children with repaired cleft palate who exhibit normal velopharyngeal closure during aerodynamic testing.
- Age and Phonetic Influences on Velar Flutter as a Component of Nasal Turbulence in Children With Repaired Cleft Palate.
- The Nature of Nasal Fricatives: Articulatory-Perceptual Characteristics and Etiologic Considerations.
- Acoustic-temporal aspects of stop-plosives in the speech of Persian-speaking children with cleft lip and palate.
- Velopharyngeal Status of Stop Consonants and Vowels Produced by Young Children With and Without Repaired Cleft Palate at 12, 14, and 18 Months of Age: A Preliminary Analysis.
- Aerodynamic and Laryngeal Characteristics of Place-Dependent Voice Onset Time Differences.
Dr. David J Zajac BS, MA, PH.D.'s Practice location
UNC Dental Faculty Practice (Endodontics, General Dentistry, Operative Dentistry, Oral and Maxillofacial Pathology/Radio
120 Dental Circle Tarrson Hall -Chapel Hill, NC 27514Get Direction
Dr. David J Zajac BS, MA, PH.D.'s reviews
Write ReviewRecommended Articles
![]()
How Common is Autism?According to a recent survey, 1 out of every 52 children who attend school is autistic. The rates of the disease are constantly increasing, and the disease has trippled in the past decade, not only in the U.S but all around the world.Boys are more affectedWhen we study different ethnic groups and...
![]()
What Is Dysarthria: Symptoms, Causes, Treatment, and MoreWhat is dysarthria?Dysarthria is a speech disorder that is caused by weak, paralyzed, or damaged oral muscles. Those who have dysarthria usually have trouble speaking along with poor articulation, poor phonation, and poor respiration. Others may also have a hard time understanding people who have...
![]()
Clinically Isolated Syndrome vs. Multiple Sclerosis: What You Need To KnowClinically isolated syndrome presents the same type of attack where the body’s immune system attacks the central nervous system. If this only happens once, it's known as CIS.Clinically Isolated SyndromeDespite popular belief, CIS does not always go on to develop multiple sclerosis. This does...
![]()
Late Talkers May Not Have Issues When They Become TeenagersChildren who are Late Talkers may have problems with behavior and emotional development as toddlers, but this may not persist into their teenage years, according to a study published in the journal, Pediatrics. In this study, the researchers followed 2,800 children from birth up until they were...
![]()
The History of Muscular DystrophyWhat is muscular dystrophy?Muscular dystrophy is an inherited disorder, which is often characterized by a progressive type of muscular degeneration and weakness. There are several types of muscular dystrophy, wherein each type eventually leads to an increased disability, strength loss, and potential...
![]()
Understanding Relapsing-Remitting Multiple Sclerosis (RRMS)Most patients who are diagnosed with multiple sclerosis usually fall under the category of having RRMS. In most patients, relapsing-remitting multiple sclerosis in the course of the disease changes after several decades and usually becomes worse, and the patient’s diagnosis is likely to progress...
Nearby Providers
![]()
Mrs. Lynn P. Mcconnell M.S., CCC/SLP100 MANNING DR CHAPEL HILL NC 27599![]()
Jackson Roush101 MANNING DR CHAPEL HILL NC 27599![]()
Brenda Robinson101 MANNING DR CHAPEL HILL NC 27599![]()
Linda Watson101 MANNING DR CHAPEL HILL NC 27599![]()
Katarina L Haley101 MANNING DR CHAPEL HILL NC 27599![]()
Elizabeth Crais101 MANNING DR CHAPEL HILL NC 27599
Nearest Hospitals
DUKE HEALTH RALEIGH HOSPITALl
3400 WAKE FOREST RD RALEIGH NC 27609WAKEMED, CARY HOSPITALl
1900 KILDARE FARM ROAD CARY NC 27518