You could probably be possible to create an animal model by destroying some hearing cells/sensors in the ear.

As for creating a device to detect what the animal "hears", similar to how there's some research that used fmri with machine learning to "see dreams",it might be possible to do that for animal hearing.

You could study auditory nerve regeneration in animals, it would just be difficult to determine whether or not it cures any tinnitus that they have.