Symptom guide · Pregnancy Smart
Baby not responding to sounds: when to recheck hearing
What does the evidence show for not responding to sounds?
- CDC's Early Hearing Detection and Intervention program sets 1-3-6 benchmarks: a hearing screen by 1 month, a full diagnostic evaluation by 3 months if that screen isn't passed, and enrollment in early intervention by 6 months when hearing loss is confirmed. 1
- Progressive hearing loss worsens over time and delayed-onset hearing loss develops after birth; CDC recommends that children at risk for either type get at least one additional hearing test by 2 to 2.5 years of age, specifically because a passed newborn screen doesn't rule either pattern out. 1
- A passed newborn hearing screen does not guarantee hearing will stay the same throughout childhood. Some inherited forms of hearing loss don't show up until a child is older, and exposure to certain infections before birth is linked to gradual hearing loss during childhood; ongoing illness, ear infections, head injury, certain medications, and loud noise are other named risk factors. 2
- Continuing to track communication milestones and raising any new concern with the pediatric team matters even after a passed screening result; a past pass is not a reason to dismiss a new concern about how a baby is responding to sound. 2
- By 4 months, CDC's checklist expects a baby to turn their head toward the sound of a parent's voice, one of the earliest concrete signs of typical hearing-linked responsiveness that a parent can watch for at home. 3
- By 6 months, the expected pattern builds further: taking turns making sounds back and forth with a caregiver, plus squealing and other vocal play. CDC's standard advice applies here too: don't wait if one or more of these is missing, talk to the child's doctor, and ask about developmental screening. 4
Auditory-response milestones by age
| Age | Expected response to sound | If it's not there yet |
|---|---|---|
| 4 months | Turns head toward the sound of a parent's voice | Mention it at the next well visit and keep watching |
| 6 months | Takes turns making sounds with a caregiver; squeals and makes other vocal play sounds | Ask about a hearing evaluation and developmental screening |
| 2 to 2.5 years (if already flagged at-risk) | A completed additional hearing test, per CDC, for children at risk of progressive or delayed-onset loss | Book directly with pediatric audiology rather than waiting for it to be offered |
When should I call my provider about not responding to sounds?
Not turning toward a caregiver's voice by 4 months, not taking part in back-and-forth vocal play or squealing by 6 months, or going quiet after previously babbling or vocalizing are the specific patterns worth raising with the pediatric team rather than waiting for a scheduled visit. A previous passed newborn hearing screen does not rule out a new concern, since NIDCD confirms some hearing loss is progressive or shows up only later in childhood. Known risk factors, prenatal infection exposure, recurrent ear infections, head injury, certain medications, or loud noise exposure, make a new concern about sound response worth mentioning even sooner. None of these lists replace your own judgment: if this symptom worries you, that on its own is enough reason to check in with your healthcare provider.
Frequently asked questions
My baby passed the newborn hearing screening. Why would they still not respond to sounds now?
A passed newborn screen checks hearing at one moment right after birth; it doesn't guarantee hearing stays the same. NIDCD notes some inherited forms of hearing loss appear only later, and factors like early infection exposure, ear infections, or head injury can affect hearing after that first screen, which is why ongoing behavioral response still matters.
At what age should a baby reliably turn toward a sound or voice?
CDC's checklist expects a baby to turn their head toward the sound of a parent's voice by 4 months, with vocal turn-taking and squealing added to the pattern by 6 months. A baby who isn't showing either behavior by the later end of that range is worth flagging.
Is a re-check needed even if my baby was never flagged as high-risk for hearing loss?
CDC's formal 2-to-2.5-year re-test recommendation is specifically for babies already known to be at risk for progressive or delayed-onset hearing loss. A baby without that risk label who still isn't responding to sound as expected should still be raised with the pediatric team directly rather than waiting for a scheduled risk-based re-check.
What counts as 'not responding to sounds' in a way that's worth mentioning to the doctor?
Not turning toward loud noises, not startling at sudden sound, not turning toward a caregiver's voice by around 4 months, or not taking part in back-and-forth vocal play by 6 months are the specific behaviors tied to CDC's milestone checklist, and any of them missing is concrete enough to describe at an appointment.
Can an ear infection cause a temporary dip in how a baby responds to sound?
Yes, NIDCD names ear infection as one of several factors linked to hearing loss in children, and fluid behind the eardrum from an infection can temporarily reduce how well sound gets through. That's still worth a pediatric check rather than assuming it will clear on its own, since the underlying cause needs to be confirmed either way.
Does exposure to loud noise affect a baby's hearing the same way it affects adults?
NIDCD lists loud noise among the factors linked to hearing loss in children, alongside childhood illness, head injury, and certain medications, without singling out a different mechanism for infants. Limiting a baby's exposure to very loud environments is a reasonable precaution regardless of current hearing status.
What happens at a full hearing evaluation if a baby isn't responding to sounds typically?
A fuller assessment goes beyond the newborn screening method and can include behavioral observation, such as watching for a baby to quiet, suck differently, or search for a sound source, alongside more formal audiology testing. The pediatric team or an audiologist can explain which methods apply at a given age.
Should I wait until my baby's next well-child visit to bring this up?
No. CDC's general milestone guidance is to act early rather than wait, contacting the child's doctor directly when a concern comes up instead of holding it for a scheduled visit. Hearing-related concerns specifically benefit from earlier evaluation, since related support and services work better the sooner they start.
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References
CDC · https://www.cdc.gov/hearing-loss-children/screening/index.html
Your Baby's Hearing Screening and Next Steps
NIDCD · https://www.nidcd.nih.gov/health/your-babys-hearing-screening-and-next-steps
CDC · https://www.cdc.gov/act-early/milestones/4-months.html
CDC · https://www.cdc.gov/act-early/milestones/6-months.html
These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure, or prevent any disease.