Audiograms are primarily used to measure how well you hear across different pitches and volumes, producing a chart that reveals whether you have hearing loss, what type it is, and how severe it is. They’re the standard diagnostic tool in audiology, but their uses extend well beyond a single office visit. Audiograms guide hearing aid programming, determine candidacy for surgical options, fulfill workplace safety requirements, and track children’s hearing development from birth onward.
Diagnosing and Classifying Hearing Loss
The most fundamental purpose of an audiogram is to answer three questions: do you have hearing loss, what kind is it, and how bad is it? The test measures your hearing thresholds at multiple frequencies, typically ranging from 250 to 8,000 Hz, which covers the range of sounds important for understanding speech and navigating daily life. Normal hearing falls at or below 25 decibels across all tested frequencies in both ears.
When hearing loss is present, the audiogram reveals which of three types is involved. Sensorineural hearing loss, the most common type, results from damage to the inner ear or the nerve pathway to the brain. On the chart, both the air conduction line (sound traveling through the ear canal) and the bone conduction line (sound vibrating directly through the skull) drop together, with no significant gap between them. Conductive hearing loss, by contrast, happens when something blocks or disrupts sound transmission through the outer or middle ear, like fluid, earwax, or a problem with the tiny bones inside the ear. This shows up as a gap between the two lines: bone conduction stays normal, but air conduction drops. When both patterns appear together, it’s called mixed hearing loss.
That distinction matters because it points toward different causes and different treatments. A conductive loss might be correctable with medication or surgery, while sensorineural loss is typically permanent and managed with amplification or implants.
Grading Severity
Audiograms don’t just show that hearing loss exists. They quantify it on a scale that predicts how much trouble you’ll have in real-world situations. The World Health Organization grades hearing loss in steps based on your better ear’s average threshold across key frequencies:
- Mild (20 to 34 dB): No problems in quiet settings, but following conversation in background noise becomes difficult.
- Moderate (35 to 49 dB): Difficulty hearing a normal speaking voice even in quiet, and significant trouble in noisy environments.
- Moderately severe (50 to 64 dB): You need loud speech to hear in quiet and have great difficulty in noise.
- Severe (65 to 79 dB): In quiet, you can hear loud speech only directly in your ear. Noise makes communication extremely difficult.
- Profound (80 to 94 dB): Unable to hear or understand even a shouted voice in any environment.
These categories help clinicians recommend the right level of intervention and give you a concrete sense of where your hearing stands.
Programming Hearing Aids
Your audiogram is essentially the blueprint for your hearing aid. Hearing aids aren’t one-size-fits-all devices. They need to amplify specific frequencies by specific amounts based on where your hearing drops off. The fitting software used by manufacturers takes your threshold data at eight standard test frequencies (250 through 6,000 Hz) and uses it to calculate how much amplification you need at each pitch.
Someone with mild high-frequency loss, for instance, needs a very different amplification profile than someone with moderate loss across all frequencies. The audiogram data determines whether you need a modest open-fit device or a more powerful hearing aid, and it shapes exactly how that device processes sound. Without an accurate, up-to-date audiogram, a hearing aid is essentially guessing at what your ears need.
Determining Candidacy for Cochlear Implants
For people whose hearing loss is too severe for hearing aids to help, audiogram results are one of the key factors in deciding whether a cochlear implant is appropriate. The evaluation goes beyond the basic audiogram to include speech recognition testing, often conducted in background noise. Scores on these tests, measured at specific signal-to-noise ratios, help determine eligibility. If speech understanding falls below 50% under standardized conditions, the person is generally considered a candidate. If scores are above 60%, they typically are not.
This threshold-based approach means the audiogram and related testing serve as a gatekeeper for one of the most significant interventions in hearing healthcare.
Workplace Noise Monitoring
Audiograms play a major role in occupational health. Federal regulations require employers to provide audiometric testing for any employee exposed to noise levels at or above an 8-hour average of 85 decibels. That threshold covers a wide range of industries, from manufacturing and construction to music venues and airports.
The process starts with a baseline audiogram, which must be completed within six months of an employee’s first exposure at or above 85 dB (or within one year if a mobile testing van is used). Before that baseline test, the employee needs at least 14 hours away from workplace noise so the results reflect true hearing ability rather than temporary shifts from recent exposure. After the baseline is established, annual audiograms are required for every exposed worker. Each year’s results are compared against the baseline to detect any shifts that could signal early noise-induced hearing damage, allowing employers to step in with better hearing protection or reduced exposure before the loss becomes significant.
Screening and Monitoring Children
Audiograms and hearing screenings are critical in pediatric care because undetected hearing loss can delay speech, language, and cognitive development. The recommended benchmarks are aggressive by design: screen for hearing loss before 1 month of age, complete a full diagnostic evaluation before 3 months, and enroll in early intervention services before 6 months. This is known as the 1-3-6 framework.
If a baby doesn’t pass an initial screening, a full audiometric evaluation should happen as soon as possible and no later than 3 months. Children who are at higher risk for hearing loss that develops later or worsens over time should have at least one hearing test by age 2 to 2½. Beyond those early milestones, audiograms continue to be useful throughout childhood whenever a parent, teacher, or doctor suspects a child isn’t hearing well. The earlier a problem is caught, the more effective the intervention.
Tracking Changes Over Time
A single audiogram captures a snapshot, but a series of audiograms over months or years reveals trends. This is valuable in several scenarios: monitoring whether age-related hearing loss is progressing, checking whether a medical treatment for an ear condition is working, evaluating recovery after ear surgery, or watching for hearing damage from certain medications known to affect the inner ear. The comparison between a current audiogram and earlier ones can show whether hearing is stable, declining, or improving, and how quickly those changes are happening. That information often drives decisions about whether to adjust treatment, start using hearing aids, or pursue further testing.