Implantable cochlear system with integrated components and lead characterization

A method of compensating for variability in a middle ear sensor comprising:

• receiving a stimulus signal via a middle ear sensor,
• generating, with the middle ear sensor, an input signal based on the stimulus signal;
• applying an analog filter to the generated input signal to generate an analog filtered signal;
• applying a digital filter to the generated analog filtered signal to generate a digitally filtered signal;
• measuring a frequency response of the digitally filtered signal and/or the analog filtered signal with respect to the input signal;
• and
• adjusting the digital filter to normalize the frequency response of the digitally filtered signal with respect to the stimulus signal.

A system comprising:

• a cochlear electrode;
• a stimulator in electrical communication with the cochlear electrode;
• a middle ear sensor configured to receive a stimulus signal and generate an input signal based on the received stimulus signal;
• and
• a signal processor in communication with the stimulator and the middle ear sensor, the signal processor having an analog processing stage and a digital processing stage and being programmed with a transfer function and being configured to:
• receive the input signal from the middle ear sensor;
• input the received input signal to the analog processing stage to generate an analog processed signal;
• input the analog processed signal to the digital processing stage to generate a digitally processed signal, the digitally processed signal corresponding a normalized stimulus signal to reduce variability in a frequency response of the middle ear sensor;
• and
• output a stimulation signal to the stimulator based on the digitally processed signal and the transfer function.