[Review of 1 000 Hz probe tone tympanogram applying to evaluate middle ear of infants].

1 000 Hz probe tone acoustic admittance test as a efficient method used to evaluate function of middle ear in infants, has reached consensus from domestic and foreign scholars. But there still exsits controversy on proper use in infants of months old. Here is to make a brief introduction about physiological characteristics of middle ear in infants, 1 000 Hz tympanometry and applicable age range, hoping to providing reference for future research.