The extent to which the brain compensates for indistinction I discovered by listening to birdsong. The first time I heard a blackbird with my new high-frequency bias, I was stunned by its clarity and beauty, and by the fact that it was so loud. In a healthy ear the arrays of thousands of hair cells operate according to a ‘volleying’ mechanism, taking it in turns to transmit the very fast-moving energy impulses of high-frequency sound. The electrodes of the implant cannot do this. Yet by looking at spectrograms of birdsong, I can see that a large proportion of the sound is within the frequency limits of what I can distinguish, albeit crudely, and that is enough for me to take in and interpret these songs, many of which I have no memory of hearing before.
Thursday, August 14, 2014
An amazing essay by poet and musician Josephine Dickinson about hearing with a cochlear implant (via Shanna C.):