Hi. Loud noises are known to irritate and damage the auditory
nerve. This is regardless of whether you are able to hear or not. These sound travel through the
eardrum,
ossicles and then to the
inner ear. With loud music these vibrate more than necessary and injure the nerve responsible for hearing.
The bird chirping sound that you hear is called
tinnitus which means you are perceiving a sound when there is actually no sound. The irritated nerve misfires and produces the feeling of a sound when there is no real source of the sound outside.
Every time you have a hic-up, burp or intensely swallow, it closes a tube called the Eustachian tube (ET) which connects the middle ear to the back of the nose in order to equalize pressure between the two regions. When the ET closes, it creates a negative pressure within the middle of the ear and this creates irritability in the auditory nerve that creates the tinnitus.
I would recommend that you avoid exposure to loud noises and use your hearing
aids as much as possible (They must have been programmed to your hearing test results and the audiologist may have created filters for high frequency sounds).
Oral
multivitamin tablets (B12, C and anti-oxidants) once a day after breakfast can help in early recovery of the nerve.
Do see your ENT or your audiologist is the tinnitus persists for more than a week.