Figure 6. Opening the cochlea reduces the vibratory response to low‐frequency sound stimuli.

Data from two different representative guinea pigs are shown in response to 50, 60 and 70 dB SPL stimuli. The gain and phase are normalized to the middle ear (ME) response at the 95% location (A and C) and the 80% location (B and D). In the dead intact cochlea (red), the gain response is low‐pass‐like. After opening the bone over the helicotrema and repeating the measurements, the opened cochleae demonstrated vibratory responses that were more band‐pass. However, there were no substantive changes to the phase response.