Hearing tests: how they work and how to read your audiogram

A hearing test measures the softest sounds you can detect at several pitches, then plots those results on an audiogram. The chart can show whether hearing differs between ears, which pitches are harder to hear, and whether the pattern may involve the outer or middle ear or the inner ear. It does not, by itself, explain every communication problem or identify a cause. An audiologist or clinician interprets it alongside your symptoms, ear examination, and sometimes speech testing. If you are wondering whether a browser check is worth trying first, see are online hearing tests accurate? or try our free online hearing test.

What happens during a hearing test?

A standard evaluation includes questions about hearing, ringing, noise exposure, and medical history. The examiner may check your ears with an otoscope. During pure-tone testing in a quiet room, you wear headphones or inserts and indicate when you hear tones. Their loudness and pitch change to estimate your softest detectable level.

The test checks each ear separately. Air-conduction tones travel through the ear canal and middle ear to the inner ear. Bone-conduction testing uses a small vibrator placed behind the ear to send sound through the skull, bypassing the outer and middle ear. Comparing the two helps distinguish a conductive pattern from a sensorineural one. The audiometry guideline recommends a controlled acoustic setting, calibrated equipment, and interpreting pure-tone results with clinical information and speech testing when relevant. PubMed: audiometry guideline, PMID 29929777

A full assessment may include speech recognition tests or tympanometry, which checks how the eardrum and middle ear respond to pressure. A tone chart alone is not the whole assessment.

How to read a hearing test results chart

An audiogram can look upside down if you expect louder sounds to appear higher on the page. Its vertical scale usually shows hearing level in decibels hearing level, or dB HL. Smaller numbers near the top mean softer tones were audible. Larger numbers farther down mean a louder tone was needed before it could be heard. The horizontal scale shows frequency in hertz (Hz), or pitch: low-pitched tones are toward the left and high-pitched tones toward the right.

Symbols mark each ear and air- or bone-conduction thresholds; check the chart legend because conventions can vary. A dip means reduced sensitivity at those tested pitches, not that every sound at that pitch is inaudible.

Part of the audiogram	What it tells you
Horizontal axis, Hz	The pitch tested, from lower to higher frequency
Vertical axis, dB HL	How loud the tone had to be for you to detect it
Separate ear symbols	Whether the two ears have similar or different thresholds
Air and bone marks	Whether a gap suggests an outer or middle ear contribution
Speech results	How well you recognize speech under the test conditions

The phrase “hearing loss chart dB” can mislead: dB HL is a standardized hearing scale, not a measure of everyday loudness. Labels such as mild or moderate summarize sensitivity, and cutoffs can vary. Ask which thresholds were averaged and how they relate to your communication concerns.

What does hearing loss by frequency mean?

A hearing test sound frequency is a pitch value, measured in hertz. Lower frequencies correspond broadly to bass sounds; higher frequencies correspond to sharper sounds, including many consonant cues that help distinguish words. The test samples selected pitches, not every sound. Speech understanding also depends on background noise and clarity.

A pattern that slopes down toward the high-frequency side means higher-pitched tones needed to be louder for you to hear them. Some people notice that voices seem less crisp or that similar-sounding words are harder to tell apart, especially in a busy room. A low-frequency pattern or a difference between ears can have other explanations. Audiometry can describe the pattern and help guide next evaluation, but the shape alone does not establish its cause. Reviews of hearing tests describe the audiogram as a way to characterize threshold configuration, severity, and affected frequencies, while other tests may be needed to investigate further. PubMed: review of audiometry and other hearing tests, PMID 27638069

What about a hearing test high pitch result?

A high-pitch result refers to thresholds at the right-hand side of the chart, not a single overall grade. If those thresholds are poorer than low-frequency thresholds, the chart has a high-frequency pattern. That observation may help explain difficulty hearing some speech details, but it cannot tell you whether a particular sound, person, or conversation will be easy or hard in every setting. Word recognition testing and a discussion of real-world listening can add useful context.

Air-bone gaps and the two ears

When bone-conduction thresholds are better than air-conduction thresholds by a meaningful gap, clinicians may call this an air-bone gap. That pattern can point toward a conductive component involving sound transmission through the outer or middle ear. When both air and bone thresholds are elevated to a similar degree, the pattern is more consistent with sensorineural loss involving the inner ear or auditory pathway. A mixed pattern can include both. These are broad descriptions, not a diagnosis from a chart alone. PubMed: review of hearing tests, PMID 27638069

The audiologist also compares sides. A substantial asymmetry, unexpected bone-conduction pattern, or word recognition result that does not fit the tone thresholds may warrant additional evaluation. The age-related hearing loss guideline recommends further evaluation or referral for significant asymmetric, conductive, or mixed loss and poor word recognition. PubMed: age-related hearing loss guideline, PMID 38682789

What an audiogram cannot tell you

A pure-tone audiogram measures tone sensitivity under controlled conditions. It does not fully measure understanding speech in a restaurant, following several speakers, or locating sounds. If listening remains difficult despite relatively good thresholds, ask whether speech-in-noise testing is appropriate. A study found that audiograms were not easy for primary care physicians to interpret, which is one reason to ask the audiologist to explain your own results in plain language. PubMed: audiogram interpretability study, PMID 32815399

Ask: What are the findings in each ear? Is there an air-bone gap? How did speech recognition compare with tone thresholds? Does this pattern need follow-up? For adults 50 and older, the 2024 guideline recommends an audiogram when screening suggests hearing loss, and suggests reassessing at least every three years when hearing loss is known or a change is reported. Your clinician can advise on timing for your individual situation. PubMed: age-related hearing loss guideline, PMID 38682789

Warning signs that need prompt care

Arrange prompt assessment if hearing suddenly drops, especially in one ear. It can occur with ringing or vertigo. The guideline calls for prompt evaluation and audiometry, as soon as possible and within 14 days. Do not wait for a routine appointment. PubMed: sudden hearing loss guideline, PMID 31369359

Also seek prompt care for ringing in one ear, pulsing ringing that matches your heartbeat, ringing with vertigo, facial weakness or a severe headache, or ear pain with fever or discharge. These symptoms need clinical context and should not be interpreted from an audiogram alone. New or worsening symptoms deserve medical care.

Habits that support hearing and communication

A test gives you a baseline. Reduce excessive noise: turn down personal audio, step away from loud speakers, and use hearing protection around power tools or firearms. For conversation, face the speaker, reduce background sound, and ask people to get your attention first.

Keep follow-up appointments if results are abnormal or hearing changes. If fullness or wax seems to affect hearing, ask a clinician to examine the ear. An online tone check cannot replace diagnostic audiometry or evaluate urgent symptoms. The online hearing test is intended only as a frequency tone check.

What about supplements?

Supplements are not a substitute for a hearing evaluation, and an audiogram does not tell you that a supplement will improve hearing. Evidence for products marketed for hearing varies by ingredient and outcome, and a product claim should not be confused with a measured change in hearing thresholds. Our scores are strict: Quietum Plus is among the labels tied near the top of the hearing comparison, but its review score is low. See the hearing supplements comparison for how the labels compare and the Quietum Plus review for its specific assessment. Results vary. Talk to your doctor before using supplements, especially if you take medications.

Next step

If you have a chart already, ask the audiologist to walk through each ear, the high-frequency thresholds, and the speech results with you. For a broader overview, read age-related hearing loss: signs men miss, online hearing tests: are they accurate, or hearing aids for first-time users. If considering supplements, continue to the hearing supplements comparison.

FAQ

Is an audiogram the same as a hearing test?

An audiogram is the graph that records results from pure-tone testing. A complete hearing evaluation may also include ear examination, speech testing, and middle-ear measures.

What does 30 dB mean on a hearing test?

It means a tone at that tested frequency had to reach 30 dB HL for you to detect it under the test conditions. Its meaning depends on the frequency, the other thresholds, and the clinic’s interpretation.

Can you have trouble understanding speech with a normal audiogram?

Yes. A pure-tone chart measures tone detection, not every aspect of speech understanding in complex settings. Tell your clinician where listening is difficult; additional tests may help clarify the problem.

Does a high-frequency hearing loss mean I will lose all high-pitched sounds?

No. The audiogram shows the quietest tones detected at selected pitches. It describes sensitivity across those test points, rather than whether you can never hear a particular sound.

How often should I repeat a hearing test?

It depends on your results, symptoms, and exposure history. The age-related hearing loss guideline suggests assessment at least every three years for people with known loss or reported change, while sudden or worsening symptoms call for earlier medical advice.