My husband is suffering from a bell like ringing sound in his ear because of which he's not able to sleep or do anything peacefully. After consulting e.n.t specialists it was found that no particular problem pertaining to ears was detected. Rather a  neurologist recommended him some medicines to take for 15 days but still there is no improvement. The intensity of the sound keeps on changing so it's little less from the starting but not completely gone. What should we do?