1. because you said that audiogram has shown improvement, thus you should take drugs with nervine action (Immunomodualtion) and with ability to regenerate nerves like "Ashwagandha-Brihat vaat chintamani Ras-sarivadi vati, Brahmi
, Jatamansi,Tulsi,Abhrak Bhasam,Bhringraj" after consulting with Ayurveda physician.
2. If perforation is not there you can also go ahead with "Karnpooran"
3. mephites is one homeopathic
medicine which has given good results to me in such cases, you can consult with a Homeopathic Doctor regarding the same.