Objective To explore the effect of tympanic acoustic immittance test in hearing screening of children.Methods A total of 685 children aged 3 and over who underwent physical examination in healthcare department of a hospital in Zhongshan from March 2017 to July 2018 were selected as subjects.The tympanic acoustic immittance test was performed

and the test results were analyzed according to the tympanogram.The children with abnormal results were referred to the department of otolaryngology

and the referrals were followed up.Results A total of 147 children with monaural or binaural tympanogram were abnormal

accounting for 21.5%.In the abnormal tympanogram

the tympanogram of 22 ears showed an Ad-shaped curve（10.5%）

129 ears showed a B-shaped curve（61.7%）

and 58 ears showed a C-shaped curve（27.8%）.Among the subjects with abnormal tympanogram

59 cases（40.1%） went to the specialist for diagnosis and treatment.Among the subjects referred

26 cases were diagnosed with related diseases

accounting for 44.1% of the referrals

including 12 cases of secretory otitis media

7 cases of otitis externa

4 cases of adenoidal hypertrophy and 9 cases of sinusitis（1 case may have two or more diseases at the same time）.Conclusion By evaluating the middle ear function of children

tympanic acoustic immittance test can find the related diseases that affect the middle ear function timely

and then prevent the hearing loss to a certain extent

so it can also be used as one of the methods of hearing screening.In clinical application

it can be combined with otoacoustic emission and pure tone audiometry to improve the accuracy of screening results.At the same time

publicity and education for parents should be strengthened to improve parents’ understanding of hearing loss.