HI I have gone through your mail as you said that you are having bubbling sound in both ears with some hearing loss
,you have already ringing sound in both ears for last one year,recently you feel some stress
in your neck muscles during singing.you are intersted to know the relationship between your problems.To know this you are requested to go for these investigations- (1) Pure tone audoimetery.(2) Impedance Audiometery.Apart from this good clinical examination of your throat and ear is very important for getting the information about type of hearing loss,cause of tinnitus
and assciated throat infection
which may give rise to stress in neck muscles during speaking and also responsible for bubbling sound in ear and hearing loss. For this you should contact your E.N.T.specialist for physical examination and co-relating it with inferences of investigations.Thanks.