Routine medical care often fails to identify babies with significant sensorineural or nerve hearing losses because this type of problem is invisible and unable to be detected during a physical examination. As a result, routine hearing screening is mandatory at birth in order to identify hearing loss before it has adverse effects on the baby. However, sometimes babies with hearing loss may not be identified at birth or sometimes hearing losses develop after hearing screening has been passed, Therefore, it is important for parents to be aware of the warning signs of hearing loss.
Parents are usually the first to suspect a problem but they may reach wrong conclusions when they notice their baby not responding to sound. Therefore, identification of a hearing loss is often not made for 1 to 2 years after it is first suspected, causing the baby to experience delays in development which persist throughout the child's life.