In a bit of a deviation for us, I thought it may be interesting to look at hearing aids for animals and the progress that has been made. Long story short, the animal hearing aids are simply sound amplifiers. They have had no advances similar to cochlear implants to date.
In a nutshell, hearing aids for animals at this point are useful in circumstances where residual hearing remains. The simple reason for the lack of advancement for animal hearing aids is money. Cochlear implants and similar technologies cost on the arena of $23,000 prior to the implant surgery. So long as the pricing remains here animal hearing aids will likely not progress beyond where they are.
This is a bit of a deviation for our site and clearly not our strength so please add any information that you have or correct us if needs be.