A practical guide to OAE testing protocols, result interpretation, and the SLP's role in hearing screening across clinical settings.
Undetected hearing loss remains one of the most common and preventable barriers to speech-language development. Even mild losses, as low as 15 to 25 dB, can delay vocabulary growth, phonological awareness, and classroom comprehension. For speech-language pathologists, otoacoustic emissions screening offers a fast, noninvasive way to flag cochlear dysfunction before it compounds into broader communication deficits.
OAE testing requires no behavioral response from the individual, making it especially valuable for infants, toddlers, and clients who cannot reliably participate in pure-tone audiometry. As state practice acts increasingly recognize hearing screening within the SLP scope of practice, clinicians who understand OAE technology, interpretation boundaries, and referral criteria are better positioned to catch what might otherwise be missed entirely. This guide covers how OAE screening works, where it fits into the SLP evaluation and treatment planning process, when to refer to audiology, and why early identification of hearing loss is so critical to speech-language outcomes.
Otoacoustic emissions are faint sounds that originate inside the inner ear. They are produced by the outer hair cells of the cochlea, a snail-shaped structure responsible for converting sound vibrations into the electrical signals your brain interprets as hearing. Understanding what OAEs are and why they matter gives speech-language pathologists a solid foundation for incorporating hearing screening into clinical practice.
Here is the basic chain of events that produces an OAE:
This echo is the otoacoustic emission. It is far too quiet for a person to hear on their own, but a sensitive microphone placed at the opening of the ear canal can detect and record it. Researchers and clinicians refer to this process as the cochlear amplifier mechanism, and it is the biological engine behind OAE screening.
OAEs are present in ears with normal or near-normal cochlear function and are typically absent or significantly reduced when outer hair cells are damaged. Because of this relationship, OAE screening serves as an objective, non-invasive check on outer hair cell integrity.
A few clinical details are especially relevant for SLPs:
Speech-language pathologists regularly work with populations at higher risk for undetected hearing loss, including young children with delayed speech, older adults, and individuals with developmental differences. Knowing what OAEs measure helps you determine when this screening tool is appropriate, interpret the results you receive from colleagues, and explain the process to families in accessible terms. A clear grasp of the underlying physiology also strengthens your clinical reasoning when deciding whether a client's communication challenges may have an auditory component that warrants a referral for comprehensive audiological evaluation. If you are exploring how audiology and SLP intersect, learning how to become an audiologist can deepen your understanding of the professionals who conduct these diagnostic assessments.
Understanding the mechanics of an otoacoustic emissions screening helps speech-language pathologists feel confident when administering the test, explaining results to caregivers, and determining next steps. The process is quick, noninvasive, and does not require the individual being screened to respond behaviorally, which is one reason it is so widely used with newborns and young children.
A typical OAE screening follows a straightforward sequence that takes roughly one to three minutes per ear:
The person being screened does not need to raise a hand or press a button. This makes OAE screening especially practical for infants, toddlers, and individuals who may have difficulty participating in behavioral hearing tests.
Screening devices use one of two stimulus approaches, and each has distinct strengths.
Transient evoked otoacoustic emissions (TEOAEs) use a broadband click stimulus. The cochlea responds across a range of frequencies, typically covering roughly 1,000 to 4,000 Hz. TEOAEs are widely used in newborn hearing screening programs because they provide a fast, global snapshot of outer hair cell function across the speech-frequency range.
Distortion product otoacoustic emissions (DPOAEs) use two simultaneous pure tones presented at slightly different frequencies. The cochlea produces a measurable distortion product at a mathematically predictable frequency. DPOAEs allow frequency-specific testing across a broader range, typically from about 1,000 to 8,000 Hz. This makes DPOAEs particularly useful when a clinician wants to evaluate cochlear function at specific frequencies, such as the higher frequencies that are often affected early in noise-induced or ototoxic hearing loss.
Some screening programs and clinics prefer one type over the other based on the population served and the clinical question at hand.
OAE screening devices are designed to produce a clear outcome: pass or refer. The device determines this by evaluating the signal-to-noise ratio (SNR) at each tested frequency band. A pass generally requires an SNR of at least 6 dB across specified frequency bands, indicating that the cochlear emissions are clearly distinguishable from background noise.
A refer result means that emissions were absent, too weak, or could not be detected above the noise floor at one or more frequencies. A refer does not automatically confirm hearing loss. It signals that further evaluation is needed, often through a diagnostic audiological assessment.
In a research or diagnostic context, OAE amplitudes typically fall somewhere between negative 10 and positive 20 dB SPL, depending on the frequency tested, the individual's age, and the device used. However, SLPs conducting screenings should understand that most screening-level OAE devices do not display raw amplitude data. Instead, they simplify the output to a pass or refer designation.
This distinction matters. SLPs new to OAE screening sometimes expect to see a number they can compare to a threshold, similar to a pure-tone audiogram. OAE screeners work differently. The internal algorithm handles the comparison, so the clinician's job is to ensure proper probe placement, a quiet testing environment, and an accurate recording of the result. If a screening device does display amplitude or SNR data, the SLP should use it to confirm the pass/refer outcome rather than to diagnose the type or degree of hearing loss, which falls within the audiologist's scope of practice.
OAE screening results often feed into broader SLP evaluation and treatment planning workflows, especially when hearing status may be influencing speech or language development. By understanding how the equipment works and what the results mean, SLPs can play a valuable role in identifying individuals who need audiological follow-up, all while staying within their professional boundaries.
OAE screening devices typically use one of two measurement approaches. Understanding the differences between Transient Evoked OAEs (TEOAEs) and Distortion Product OAEs (DPOAEs) helps SLPs make informed decisions about equipment and screening protocols.
One of the most common questions student clinicians and early-career SLPs ask is whether they are actually allowed to perform OAE screenings. The short answer is yes, but the details matter. Understanding the boundaries of your SLP scope of practice protects both you and the children or adults you serve.
According to current ASHA guidelines (valid through 2026), hearing screening falls squarely within the SLP's scope of practice.1 That includes conducting OAE screenings using automated units. However, ASHA draws a firm line between screening and diagnostic evaluation. As an SLP, you may administer an OAE screening and determine whether a result is a "pass" or "refer," but you may not independently interpret diagnostic findings, change device parameters on non-automated equipment, or render a diagnosis of hearing loss. Those responsibilities belong to the audiologist.
ASHA also emphasizes collaboration with audiologists, particularly when establishing screening protocols, selecting equipment, and determining referral criteria.1 Even though the SLP carries out the screening independently in most situations, the broader program should involve audiologist oversight at the design level.
ASHA expects any SLP performing OAE screenings to be "specifically educated and appropriately trained" in the procedure.1 This means competency-based training, not simply reading a device manual. Many graduate programs now include hearing screening coursework, but if yours did not, you will need to pursue continuing education or hands-on training before adding OAE screening to your clinical toolkit.
It is also important to check your state licensing board's requirements. State-level regulations vary, and some states require additional certification, supervised practice hours, or formal documentation of training before an SLP can conduct OAE screenings. A handful of states may impose restrictions that go beyond ASHA's national guidelines, so verifying your SLP license requirements by state is a step you should not skip.
SLPs conduct OAE hearing screenings across a wide range of settings:
In most states, yes. An SLP can perform OAE screening independently, without an audiologist physically present, as long as the SLP is using an automated OAE unit, operating within screening (not diagnostic) parameters, and following state-specific regulations. ASHA even supports OAE screening within telepractice models, where an on-site facilitator places the probe tip and the SLP monitors results remotely.2
The critical point to remember is that any "refer" result must lead to a referral to an audiologist for comprehensive evaluation. Screening is your starting line, not your finish line. When a child or adult does not pass, your role shifts from screener to advocate, ensuring the individual gets connected to diagnostic audiology services as quickly as possible.
For detailed guidance on screening protocols and referral pathways, we recommend reviewing the Childhood Hearing Screening Practice Portal published by ASHA, which outlines best practices aligned with the current guidelines.
OAE screening plays a central role in the national effort to identify hearing loss as early as possible. For SLP students and practicing clinicians, understanding the framework behind newborn and early childhood hearing screening is essential, especially because SLPs frequently serve as front-line screeners in settings where audiologists are not readily available.
The Early Hearing Detection and Intervention (EHDI) program, coordinated at the federal level by the CDC and HRSA, establishes clear timelines for catching hearing loss in infants:1
These benchmarks, often called the 1-3-6 guidelines, represent the gold standard for early identification. Prior to the year 2000, fewer than 10 percent of U.S. newborns were screened for hearing loss.3 By 2022, national screening coverage exceeded 98 percent, with approximately 95.6 percent of infants screened within the first month.2 That dramatic improvement reflects decades of advocacy and policy development.
Despite high initial screening rates, the follow-up picture is more concerning. Among infants who referred on their initial screening in 2022, only about 39.9 percent received the recommended diagnostic evaluation, leaving roughly 60 percent lost to follow-up.1 Similarly, among those infants identified as needing early intervention, only about 40.7 percent were enrolled in services.1 These gaps mean that many children with permanent hearing loss, which affects approximately 1.7 per 1,000 newborns, may miss the critical early intervention window. Over 6,000 infants were identified with permanent hearing loss in 2022 alone, underscoring the scale of the challenge.
SLPs working in early intervention should be aware of these gaps because families who were lost to follow-up after an initial referral may later present with speech-language disorders that are ultimately rooted in undetected hearing loss.
In many Head Start programs, preschool settings, and Part C early intervention programs, on-site audiologists are simply not available. These programs often rely on SLPs to conduct hearing screenings, including OAE testing. This is well within the SLP scope of practice, and it is one of the most impactful contributions an SLP can make in early childhood settings. A public health speech-language pathologist working in community-based programs may find OAE screening among their most frequent responsibilities. Identifying a child who needs audiologic follow-up can change the entire trajectory of that child's communication development.
School-based and early childhood programs also represent a second opportunity to catch children who slipped through the newborn screening net. SLPs in these roles should be comfortable both administering OAE screenings and educating families about the importance of follow-through when a referral is made.
One of the most important things for SLPs to know is that a "refer" result on an OAE screening does not mean the child has a confirmed hearing loss. In newborn programs, the initial refer rate typically falls somewhere between 2 and 10 percent, depending on how soon after birth the screening is performed. Screenings done in the first 24 hours tend to have higher refer rates because residual fluid or debris in the ear canal can interfere with OAE detection. In school-age programs, refer rates vary by population and screening conditions but generally remain in a similar range.
Contextualizing these numbers for families is an important part of the SLP's role. Parents who hear that their baby "failed" a hearing test may experience significant anxiety. Explaining that most infants who refer on the first screening will pass a follow-up test, while still emphasizing the importance of completing that follow-up, helps families navigate the process with less fear and greater compliance.
For more detailed national EHDI data, the CDC publishes annual EHDI screening statistics, and a recent government examination found that over 320,000 children received diagnostic services following referral between 2018 and 2022.4
The Early Hearing Detection and Intervention (EHDI) program follows a 1-3-6 guideline to ensure timely identification of hearing loss and connection to services. While national newborn hearing screening coverage has reached approximately 98%, roughly 33% of infants who do not pass their initial screening are lost to follow-up before receiving a diagnosis.
Understanding what an OAE screening printout tells you, and just as importantly, what it does not tell you, is essential for any SLP who participates in hearing screening programs. While you are not diagnosing hearing loss, you do need to read results accurately so you can counsel families, document findings, and make timely referrals.
OAE screening produces one of two outcomes for each ear.
Keep in mind that environmental noise, debris in the ear canal, middle ear fluid, or a poorly seated probe tip can all produce a false refer. That is why re-screening protocols exist.
Most OAE screening devices determine a pass or refer by calculating the signal-to-noise ratio (SNR) at each tested frequency band. The emission (signal) is compared against the background noise floor, and the device evaluates whether the emission rises above the noise by a sufficient margin.
The standard criterion on most clinical screening devices is a 6 dB SNR. On a typical printout, you will see each frequency band listed alongside the measured SNR value. Frequencies where the SNR meets or exceeds 6 dB are marked as passing. Frequencies that fall short are flagged. Some devices use color coding (green for pass, red for refer) or simple checkmarks and Xs.
When reviewing a printout, look at each frequency band individually rather than relying only on the overall pass or refer designation. Noting which specific frequencies referred can give the audiologist useful information and may reveal patterns worth tracking over time.
OAE screening evaluates one specific structure: the outer hair cells of the cochlea. That narrow focus means several types of hearing difficulty will not be detected by this test.
This is why OAE screening should never be treated as a comprehensive hearing evaluation. If a child's speech, language, or listening behaviors raise concern even after a passing OAE screen, a referral to audiology is still appropriate. Understanding common speech disorders and their potential link to undetected hearing loss can help SLPs recognize when further testing is needed.
A single refer result does not necessarily mean the child needs an immediate audiological evaluation. Most programs follow a structured re-screening timeline.
Documenting the date of the initial screen, which ears and frequencies referred, and any relevant environmental or procedural factors (noisy room, fussy child, probe fit issues) helps the audiologist interpret the history and plan next steps efficiently. Leveraging the right speech language pathology assessment tools alongside OAE data ensures your documentation is thorough. As an SLP, your careful interpretation and documentation bridge the gap between screening and diagnosis.
Both otoacoustic emissions screening and pure-tone audiometry are widely used to identify hearing concerns, but they work in fundamentally different ways. Understanding those differences helps SLPs choose the right tool for a given setting and age group, and it strengthens referral decisions when results are unclear.
OAE screening measures sounds produced by the outer hair cells of the cochlea in response to acoustic stimuli. The test requires no behavioral response from the individual, which makes it especially useful for infants, toddlers, and children who cannot reliably raise a hand or press a button. Pure-tone audiometry, by contrast, asks the listener to indicate when they hear tones at specific frequencies and intensities. It maps hearing thresholds across a range of pitches but depends on the person's ability to understand and follow instructions.
Because OAE screening is objective, it removes the variable of patient cooperation. Pure-tone audiometry, while considered a gold standard for threshold measurement, can produce unreliable results in very young children or individuals with developmental differences that affect task compliance. Knowing when each tool is appropriate is one reason many programs encourage SLPs and audiologists to collaborate closely, a dynamic explored further in our comparison of speech pathology vs audiology.
Published studies comparing these two approaches in pediatric populations are available through systematic review databases such as Cochrane Library and PubMed. Searching with terms like "OAE vs pure-tone audiometry pediatric screening sensitivity specificity" will surface peer-reviewed comparisons. In general, OAE screening demonstrates strong sensitivity for detecting outer hair cell dysfunction, while pure-tone audiometry can identify a broader range of hearing loss types, including those that may not affect OAE results (such as auditory neuropathy spectrum disorder).
Equipment manufacturers, including Otodynamics, Maico, PATH Medical, and Interacoustics, often publish technical data and validation studies on their websites. Professional associations like ASHA and the American Academy of Audiology also maintain clinical practice resources that compare screening methods. Grounding your screening choices in this research aligns with broader principles of evidence-based practice in speech-language pathology.
In practice, many programs use both methods in complementary ways. OAE screening serves as a quick, objective first step, while pure-tone audiometry provides frequency-specific threshold information for older children and adults. When reviewing or establishing a screening protocol, consult your state health department guidelines and your district or facility audiologist. Comparing the evidence base for each tool in your specific population will help you advocate for the most effective and efficient screening pathway.
Knowing when and how to refer a client for a comprehensive audiological evaluation is one of the most important clinical skills an SLP can develop around hearing screening. A timely, well-documented referral can mean the difference between early intervention and months of missed opportunity.
Not every screening outcome requires a referral, but several situations should prompt immediate action. Keep this checklist in mind:
When any of these triggers are present, the SLP should move to referral rather than attempt additional screenings.
A thorough referral supports the audiologist in planning the right diagnostic battery and reduces the chance of redundant testing. For guidance on structuring clinical documentation, review best practices for SLP treatment plan examples. Your documentation should include:
Clear, organized documentation not only helps the audiologist but also strengthens the continuity of care for the client.
Referral to audiology is not a handoff. It is the beginning of a collaborative relationship. In this team model, the SLP screens, identifies risk, and monitors speech-language development, while the audiologist diagnoses hearing loss, determines type and degree, and manages amplification or other interventions. Once a diagnosis is made, the two professionals continue to coordinate: the audiologist ensures auditory access, and the SLP targets communication outcomes.
This division of labor reflects scope-of-practice guidelines rather than a territorial boundary. Both ASHA and speech-language pathologist state licensing boards recognize hearing screening as within the SLP's scope, while diagnosis and audiological management remain with the audiologist.1 When both professionals communicate openly and share findings, clients receive better care.
Billing for SLP-administered hearing screenings requires careful attention to payer policies. The CPT code 92551 (screening pure-tone audiometry) remains active for 2025 and 2026, with typical reimbursement in the range of $25 to $35.2 SLPs should be aware that the code previously associated with OAE screening (92558) is no longer recognized as of 2025, so clinicians should verify current coding guidance before submitting claims for OAE-based screenings.3
Medicare Part B generally covers audiologic services only when they are diagnostic rather than routine screening, and physician supervision is typically required for SLP billing.1 A physician referral or order must be documented, and local coverage determinations (such as LCD L35007) may require documentation of symptoms prompting the test.4
Medicaid coverage varies considerably by state. For example:
Pediatric Medicaid programs typically cover hearing screenings through the Early and Periodic Screening, Diagnostic, and Treatment (EPSDT) benefit, though prior authorization requirements apply in many states.1
Before billing any payer for hearing screening services, SLPs should verify current coverage policies, confirm required documentation, and consult with their billing department or state professional association. Reimbursement rules change frequently, and staying informed protects both the clinician and the client.
Hearing and spoken language development are deeply intertwined. When hearing loss goes undetected, even at mild levels, the ripple effects on a child's communication, literacy, and academic trajectory can be significant. For speech-language pathologists, understanding these connections is what transforms OAE screening from a procedural checkbox into a genuinely impactful clinical practice.
It is easy to assume that only severe or bilateral hearing loss causes meaningful communication delays, but research tells a different story. Children with mild or unilateral hearing loss are at elevated risk for difficulties with speech perception, phonological development, vocabulary acquisition, and overall academic performance. Even a slight reduction in hearing sensitivity can make it harder for a child to distinguish between similar-sounding phonemes, follow multi-step directions, or participate effectively in classroom discussions, particularly in noisy environments.
These effects compound over time. A child who misses subtle sound contrasts during the toddler years may develop a reduced consonant inventory. By school age, the same child may struggle with reading decoding, spelling, and pragmatic language skills that depend on consistent auditory input.
Research consistently shows that children identified with hearing loss before six months of age who receive timely intervention demonstrate significantly stronger language outcomes compared to those identified later. This finding, central to the Early Hearing Detection and Intervention (EHDI) framework, underscores why front-line screening matters so much. SLPs working in early intervention, preschool programs, and pediatric clinics are often the professionals who see these children regularly, making them ideally positioned to catch hearing loss that may have been missed at birth or developed after the newborn screening window. For families navigating early speech delays, resources like late talker activities for parents can support development while further evaluation is underway.
During evaluation and treatment, SLPs should stay alert to patterns that could point toward an underlying hearing concern:
These red flags do not confirm hearing loss on their own, but they should prompt the SLP to initiate or repeat a hearing screening and, when indicated, refer to audiology.
Not every child with hearing loss is caught by newborn screening. Some children develop late-onset or progressive hearing loss. Others may have been screened at birth but experienced hearing changes due to chronic otitis media, ototoxic medications, or genetic conditions that manifest later. SLPs serve as an essential safety net for these children. By incorporating routine hearing screening, including OAE testing when within scope, into every speech-language evaluation, clinicians can ensure that hearing status is accounted for before attributing communication difficulties solely to a speech-language disorder.
This advocacy role extends beyond individual clients. When SLPs communicate hearing screening results clearly to families and collaborate with audiologists, they help close gaps in the identification process and connect children with the services they need during the developmental window when intervention has the greatest impact. Grounding these practices in evidence-based speech therapy techniques ensures that screening protocols and referral decisions reflect the best available research.
Below are some of the most common questions speech-language pathology students and practicing SLPs have about otoacoustic emissions screening. Each answer draws on the core concepts covered earlier in this guide, so you can quickly revisit any topic that needs clarification.
