If your hearing is becoming weak or is totally gone or you can’t hear properly, after Esha salah read 

Ayet no 12 from Surah Fussilat Surah no 41 in the Quran.

“Fa kada hunna sab aa samavatin fi yo main ney va ao ha fi kuule sama in amraha”.

You will read only this part of the ayet and not the full ayet.

Read it 41 times and do a dam (blow) on your hands and rub them on your face and ears 3 times.

The duration of wazifa is 41 days without a break. Your hearing will become normal. If you continue it after 41 days then it will become extra sesitive and if you keep on doing it even after you will start to hear the angels talking too one day.