Fig. 2
From: Ultrasonic bone removal from the ossicular chain affects cochlear structure and function
Preoperative and Postoperative ABR and DPOAE testing show profound hearing loss after surgical intervention. a Following surgical intervention with the UBD, there was profound hearing loss with an ABR threshold > 85 dB detected in 10 ears at 2, 4, and 8 kHz Average ABR threshold increased following intervention for all subjects: by 67 dB to 85 dB HL at 2 kHz (p < 0.05), by 71 dB to 8 dB HL7 at 4 kHz (p < 0.05), and by 77 dB to 83db HL at 8 kHz (p < 0.05). b In all of the animals, the OAE signal-to-noise ratio (SNR) was < 5 dB, consistent with profound hearing loss after intervention