Hearing Screening in Children — When, Why and What Types of Tests Exist

What is hearing screening?

Hearing screening is the systematic evaluation of auditory function in children, with the aim of detecting any hearing loss as early as possible. Early detection of hearing impairment is essential for the normal development of language, communication, and cognitive abilities in children.

The World Health Organization recommends universal neonatal hearing screening and periodic auditory evaluations throughout childhood. Dr. Vlad Postelnicu, also a specialist in audiology, provides complete audiological evaluation using modern equipment adapted to the child's age.

Why is hearing screening important?

The importance of hearing screening in children is supported by solid medical evidence:

• Significant incidence — approximately 1–3 in 1,000 newborns present significant hearing loss at birth. The number increases among children in risk groups.
• Critical development window — the first 3 years of life are essential for language development. Undetected hearing loss during this period can lead to irreversible delays.
• Acquired hearing loss — recurrent middle ear infections, ototoxic medications, or viral infections can cause hearing loss at any age.
• Impossible detection through observation alone — parents cannot detect mild or unilateral hearing loss through observation. Children compensate or adapt, masking the problem.

Key takeaway: Children diagnosed with hearing impairment before the age of 6 months who receive appropriate intervention have language development comparable to that of normal-hearing children.

When is hearing screening recommended?

Auditory evaluation is recommended at several key points:

Neonatal screening

• At birth or within the first 30 days — according to the national neonatal hearing screening program. It is a quick, painless procedure performed in the maternity ward.
• By 3 months — diagnostic confirmation in case of an initial positive (abnormal) screening.
• By 6 months — initiation of intervention (hearing aids, speech therapy) in confirmed cases.

Preschool and school-age screening

• At 3–4 years — routine auditory evaluation, especially if risk factors are present.
• At school entry (6–7 years) — standard audiometric screening.
• Whenever warning signs appear — language delay, inattention, frequent requests for repetition, increasing TV volume, poor school performance.

Risk factors requiring additional evaluation

• Family history of childhood hearing loss.
• Prematurity or low birth weight (under 1,500 g).
• Congenital infections (cytomegalovirus, toxoplasmosis, rubella).
• Severe neonatal hyperbilirubinemia.
• Craniofacial anomalies affecting the ear.
• Recurrent or persistent otitis media with effusion.
• Exposure to ototoxic medications (aminoglycosides, chemotherapy).

Types of hearing tests in children

Auditory evaluation methods vary depending on the child's age and the purpose of the investigation:

Otoacoustic emissions (OAE)

A small device placed in the ear canal emits sounds and records the "echo" produced by the outer hair cells of the cochlea. The test is quick (2–3 minutes per ear), painless, and objective — it does not require the child's cooperation. It is the main method of neonatal screening.

Auditory brainstem response (ABR/BERA)

Electrodes placed on the scalp record the neural response to auditory stimuli. It is the most accurate test for evaluating the auditory threshold in infants and young children who cannot cooperate. It is performed during natural sleep or, in special cases, under sedation.

Tympanometry

Evaluates middle ear function and eardrum mobility. It does not directly test hearing, but identifies the presence of fluid in the middle ear, tubal dysfunction, or tympanic perforations — common causes of conductive hearing loss in children. It is complementary to nasal endoscopy in complete ear evaluation.

Pure tone and speech audiometry

The classic "headphones test," in which the child signals when hearing a sound. It requires cooperation and is generally applicable from age 4–5 years. It provides detailed information about the type and degree of hearing loss.

Behavioral audiometry (VRA, CPA)

Tests adapted for children between 6 months and 3 years, using visual stimuli or toys to obtain conditioned responses to sounds. Requires an experienced audiologist.

How is the evaluation conducted?

A complete audiological evaluation at Dr. Vlad Postelnicu's office includes:

• Detailed medical history — perinatal history, risk factors, parents' observations regarding the child's auditory behavior.
• ENT examination — otoscopy to evaluate the eardrum and external ear canal, possibly nasal endoscopy.
• Tympanometry — objective evaluation of middle ear function.
• Audiometric test — adapted to age: OAE or ABR for infants, pure tone audiometry for older children.
• Interpretation and therapeutic plan — discussion with parents about the results and, if necessary, recommendation of additional investigations or intervention.

What follows a positive screening?

A "positive" (abnormal) screening result does not necessarily mean permanent hearing loss. The next steps include:

• Retesting — screening may yield false-positive results. The test is repeated in 2–4 weeks.
• Complete audiological evaluation — if retesting confirms the abnormality, a thorough evaluation is performed (diagnostic ABR, complete audiometry).
• Etiological treatment — in cases of conductive hearing loss (caused by fluid in the ear, for example), treating the cause — including ventilation tubes if necessary — can restore normal hearing.
• Hearing aids — in cases of sensorineural hearing loss, hearing aids or, in severe cases, cochlear implants are effective therapeutic options.
• Early intervention — speech therapy, language stimulation therapy, and educational support.

Results and benefits of hearing screening

Systematic hearing screening in children provides scientifically demonstrated benefits:

• Early detection of hearing impairment, with the possibility of intervention during the critical language development window.
• Normal or near-normal linguistic and cognitive development in children diagnosed and treated early.
• Identification of treatable causes of hearing loss (effusion, tubal dysfunction).
• Monitoring of evolution in children with risk factors or known hearing loss.

Dr. Vlad Postelnicu emphasizes the importance of periodic auditory evaluation and recommends that parents not delay ENT consultation when they notice any sign that may suggest a hearing problem in their child.