The oto-acoustic emission evoked by bone conduction stimulation (BC-OAE) was investigated in 12 normal hearing ears and was compared with that evoked by air conduction stimulation (AC-OAE). The stimulus sounds were tone bursts at five frequencies between 1.0 kHz and 4.0 kHz. The BC-OAE was obtained at all five frequencies in all 12 ears. The pseudothreshold of BC-OAE was lower than that of AC-OAE at all five frequencies. The intersubject variance of pseudothreshold of BC-OAE was smaller than that of AC-OAE. The interaural difference of pseudothreshold of BC-OAE was within 5 dB in 80% of the recordings.
