1000 Hz probe tone tympanometry was accurate diagnostic tests for middle ear function in infants younger than 25 weeks of age, while 226 Hz and 678 Hz probe tone tympanometries were not.

• 1000Hz探测音鼓室声导抗测试是诊断小于25周婴儿中耳功能的较准确的检查方法,226、678Hz探测音鼓室声导抗测试则不能提供这些婴儿中耳功能的准确的信息。