The truth is, hearing loss happens gradually and the signs are subtle at first. Our own built-in defenses and ability to adapt make it difficult to self-diagnose.
Hearing loss often develops unnoticeably over several years. Most people compensate for the very gradual changes by asking others to repeat, turn the TV up louder, possibly even reading lips. Allowed to continue, these habits mistakenly make you believe there is no problem, or that it has gone away.