Abstract
The oto-acoustic emission (OAE) was recorded by air-conduction stimulation from the contralateral ear in 12 normal hearing ears with type A tympanogram, and also by air-conduction stimulation from the ipsilateral ear. The results obtained were as follows;
1) The OAE was evoked by air-conduction stimulation from the contralateral ear in all five frequencies between 1.0kHz and 4.0kHz in all 12 ears.
2) The pseudothreshold of OAE evoked by the contralateral stimulation was about 50dB higher than that of OAE evoked by the ipsilateral stimulation.
3) The averaged emission cochleogram between 1.0kHz and 4.0kHz showed the similar configurations both by the ipsilateral stimulation and by the contralateral stimulation.
4) The OAE elicited by air-conduction stimulation from the contralateral ear could be evoked by bone-conduction stimulation due to the similar mechasism as the shadow hearing in psychoacoustic audiometry.
