How to Read an Audiogram and What It Means

A hearing test can feel surprisingly personal. You may have noticed that family conversations are harder to follow, restaurant noise feels overwhelming, or the television volume has crept up. Then you are handed a page of lines, symbols, and numbers. Learning how to read an audiogram can make that page less intimidating and help you have a more informed conversation about your hearing.

An audiogram is not a pass-or-fail report card. It is a picture of the quietest sounds you could hear during testing, measured across different pitches. It helps your hearing care professional identify whether hearing loss is present, how much there may be, and what type of support may be appropriate.

Start With the Two Axes of an Audiogram

Most audiograms look like a graph. The horizontal line across the bottom shows frequency, also called pitch, measured in Hertz (Hz). Low-pitched sounds, such as thunder, a bass drum, or many vowel sounds, appear on the left. Higher-pitched sounds, such as birdsong, a smoke alarm, or consonants like “s,” “f,” and “th,” appear on the right.

The vertical line on the left shows hearing level in decibels hearing level (dB HL). This is where audiograms can initially seem backward: quieter sounds are near the top of the graph, while louder sounds are lower down. A result near the top means a person heard a softer sound. A result farther down means the sound needed to be louder before it was heard.

The numbers on the side commonly run from about -10 to 120 dB HL. Results between roughly -10 and 20 or 25 dB HL are often considered within the typical hearing range for adults. Your audiologist will interpret that range in the context of your medical history, symptoms, and daily communication needs.

What the Red and Blue Symbols Usually Mean

The test results are plotted at each frequency with symbols. Although formats can vary slightly, a common convention is red for the right ear and blue for the left ear.

A red circle, often shown as O, typically represents the right ear tested through headphones or insert earphones. A blue X usually represents the left ear tested the same way. These results are called air-conduction thresholds because sound travels through the outer ear, eardrum, middle ear, and inner ear.

You may also see brackets, triangles, arrows, or other marks. These can represent bone-conduction testing, masked testing, or a response that could not be measured at the equipment’s maximum output. The symbol itself matters, but so does the testing method behind it. Your hearing care professional should explain any markings that are unfamiliar rather than expecting you to interpret them alone.

How to Read an Audiogram Pattern

Rather than focusing on one dot, look at the overall shape. The pattern can offer clues about the sounds that may be difficult to hear in everyday life.

A flat pattern

A relatively flat line means hearing thresholds are similar across low, middle, and high pitches. If that line sits lower on the page, a person may need more volume across many types of sound. They may say that people seem to mumble, even when the speaker is not especially soft-spoken.

A downward slope toward high pitches

This is one of the most common patterns in adults. Hearing may be closer to typical in the low pitches and poorer in the higher pitches. Since many speech details are high frequency, a person may hear that someone is talking but miss clarity, particularly in noise. Words such as “cat,” “cap,” and “cash” can become easier to confuse.

Age-related changes and noise exposure can contribute to this pattern, although an audiogram alone does not determine the cause. A full assessment and conversation about work, hobbies, health history, and symptoms provide the needed context.

A low-frequency loss

When lower-pitched sounds are harder to hear, the line may sit lower on the left side of the graph and rise toward the right. This is less common than a high-frequency slope and may affect the perception of deeper voices or background rumble differently. It deserves professional interpretation, especially if it is new or noticeably different between ears.

A notch in one frequency range

Some people show a dip or “notch” around the higher frequencies, often near 3,000 to 6,000 Hz. This can be associated with noise exposure, such as loud machinery, firearms, concerts, or power tools. It does not mean every person with a notch has the same history, but it can be a useful reason to discuss hearing protection and workplace or recreational noise.

Degrees of Hearing Loss: Useful, but Not the Whole Story

Audiologists may use categories such as mild, moderate, moderately severe, severe, and profound hearing loss. These labels are based on threshold levels, usually in decibels. They offer a helpful shorthand, but they do not tell the complete story.

Two people with similar results can have very different experiences. One may communicate comfortably in a quiet home but struggle in restaurants. Another may hear speech clearly enough yet find tinnitus exhausting or feel isolated in group settings. Word understanding, listening environments, cognitive effort, vision, dexterity, and personal goals all influence recommendations.

This is also why a mild hearing loss is not necessarily “too mild” to address. If you are regularly asking people to repeat themselves, avoiding social events, or feeling worn out after conversations, those concerns matter. Hearing care should be based on how hearing affects your life, not only on a category printed on a graph.

Air Conduction, Bone Conduction, and the Air-Bone Gap

During a complete hearing assessment, you may hear tones through headphones and later through a small device placed behind your ear. The device behind the ear tests bone conduction. It sends vibration directly to the inner ear, bypassing the outer and middle ear.

Comparing air-conduction and bone-conduction results helps identify the location of a hearing concern. When both sets of results are reduced in a similar way, this may suggest sensorineural hearing loss, which involves the inner ear or auditory nerve pathways. This is the most common type of permanent hearing loss in adults.

When bone-conduction results are better than air-conduction results by a meaningful amount, there may be an air-bone gap. That can point to a conductive component involving the ear canal, eardrum, or middle ear. Earwax, fluid, infection, or middle-ear conditions are examples of concerns that can affect sound transmission. Sometimes results show a mixed pattern, with both sensorineural and conductive elements.

Only a qualified professional can diagnose the cause. An audiogram is a valuable clinical tool, but it is one part of the assessment, alongside an ear examination, medical history, speech testing, and sometimes referral to a physician or ear specialist.

Speech Testing Adds the Real-World Context

Pure tones are useful because they are precise, but life is made of voices, not beeps. Many hearing assessments include speech reception testing and word recognition testing. These results show how softly speech can be understood and how clearly words are recognized when presented at a comfortable level.

Strong word recognition may indicate that amplification could provide good access to speech, although hearing aids cannot remove all background noise or make every environment effortless. Reduced word recognition can mean that simply making sound louder may not fully restore clarity. In that case, counseling, communication strategies, assistive listening devices, and carefully programmed technology can all be part of a plan.

When an Audiogram Calls for Prompt Attention

Most hearing changes develop gradually, but a few situations should not wait for a routine appointment. Seek prompt medical attention for sudden hearing loss, a rapid change in hearing, hearing loss in one ear that appears suddenly, severe dizziness, ear pain, drainage, or a sudden new ringing sound accompanied by hearing changes.

A noticeable difference between the two ears also deserves a careful evaluation. It may have a straightforward explanation, but it should not be dismissed based on the graph alone.

Use Your Results to Ask Better Questions

Bring your audiogram to your appointment and ask what the pattern means for the situations you care about most. You might ask whether your difficulty is mainly with high-pitched speech details, whether both ears are affected similarly, how your word recognition results compare, and whether earwax or middle-ear concerns are involved.

If hearing devices are recommended, ask how they will be selected and adjusted for your specific results and lifestyle. Clear pricing and clear follow-up care matter, too. At Windsor Park Hearing Center, the goal is to help patients understand both their hearing and their options, without pressure or confusing explanations.

An audiogram gives you a starting point, not a label. With thoughtful guidance and the right next step, clearer conversations and more comfortable listening can remain very much within reach.