Method and apparatus for measuring stimulated acoustic reflex latency time

摘要

In a hearing test apparatus, a continuous tone of constant frequency is applied to one ear of a patient. A second tone is initiated in an ear of the patient and the resulting response of the intra-aural muscles is detected by measuring the change in ear canal compliance. A clock circuit measures the time period from the input of the second frequency tone to the point of response of the intra-aural muscles. This reflex latency time provides an objective measurement useful in evaluating a patient's hearing ability.