The preceding chapter formulated the need for an objective audiologic procedure to aid in the assessment of difficult-to-test populations. Limitations in current objective procedures inspired the ongoing effort to attempt to predict pure tone thresholds (PITs) accurately across a wide frequency range. Despite the complex relation between DPOAEs and PTTs, many researchers turned to distortion pr...

The purpose of this study was to determine if the menstrual cycle influences the amplitude of transient (TEOAEs) and distortion-product (DPOAEs) otoacoustic emissions. Thirteen normal-hearing, normal-cycling females were monitored weekly for 12 weeks. TEOAE and DPOAE amplitudes were analyzed to determine if amplitude changes could be detected and correlated to phases of the menstrual cycle. No ...

Otoacoustic emissions have historically been measured with an acoustical probe assembly hermetically sealed in the ear canal, imposing in most cases a limited stimulus bandwidth. A physically open recording system should afford the possibility of a greater stimulus bandwidth but the change in acoustical load may affect the magnitude of otoacoustic emissions obtained. Here it is reported that th...