Hearing test
Interpret 9-band (125–8000 Hz) pure-tone thresholds: compute left and right PTA (mean of 500/1000/2000/4000 Hz), grade with the WHO scale, and run high-frequency loss and inter-aural asymmetry checks.
Runs in your browserEvery computation happens in your browser — your data never leaves this device.
Interpretation
PTA, grade, high-frequency check and inter-aural difference.
Enter the thresholds to interpret
Bands: 0 · Left PTA: 0 · Right PTA: 0 · Max asymmetry: 0
What this tool does
- Read an audiogram quickly: type in the thresholds and get the PTA and WHO grade automatically.
- High-frequency self-check: if you wear headphones for hours, see whether 4000–8000 Hz is more than 15 dB above your speech frequencies.
- Inter-aural comparison: a 10 dB or greater difference at any frequency is flagged as asymmetric, prompting a specialist visit.
- Follow-up records: repeat the measurement over time and compare the results side by side for a downward trend.
Example
Input
L 500 10 L 1000 10 L 2000 15 L 4000 20 R 500 15 R 1000 15 R 2000 20 R 4000 25
Output
纯音听阈判读（9 频段） 左耳：已测 4 个频点，PTA（500/1000/2000/4000 Hz 平均）13.8 dB，分级 正常（<20 dB） 右耳：已测 4 个频点，PTA（500/1000/2000/4000 Hz 平均）18.8 dB，分级 正常（<20 dB） 逐频点对比（左 / 右，dB HL）： 125 Hz：— / — 250 Hz：— / — 500 Hz：10 / 15 1000 Hz：10 / 15 2000 Hz：15 / 20 3000 Hz：— / — 4000 Hz：20 / 25 6000 Hz：— / — 8000 Hz：— / — 左耳高频自检：高频均值 20 dB − 言语均值 13.8 dB = 6.3 dB（高频与言语频率基本一致） 右耳高频自检：高频均值 25 dB − 言语均值 18.8 dB = 6.3 dB（高频与言语频率基本一致） 双耳最大差值：5 dB（对称） 分级依据：WHO 听力损失分级（正常 <20、轻度 20–34、中度 35–49、中重度 50–64、重度 65–79、极重度 80–94、完全 ≥95 dB），PTA 取 500/1000/2000/4000 Hz 四点平均。 说明：纯音测听必须在隔声室由专业人员完成，本工具只做判读计算，不能作为诊断依据。
PTA averages 500/1000/2000/4000 Hz; WHO grading is normal below 20 dB and mild at 20–34 dB.
Frequently asked questions
How is PTA computed?
PTA (pure-tone average) is the arithmetic mean of the thresholds at 500, 1000, 2000 and 4000 Hz, the convention used by WHO grading and domestic hearing assessment. Left ear 10/10/15/20 dB averages to 55 ÷ 4 = 13.75 ≈ 13.8 dB.
What are the grading bands?
WHO: normal below 20 dB, mild 20–34, moderate 35–49, moderately severe 50–64, severe 65–79, profound 80–94 and complete hearing loss at 95 dB or above. The grade uses that ear's PTA; clinically the better ear is used for disability assessment.
How is the high-frequency check judged?
The mean of 4000/6000/8000 Hz minus the speech-frequency mean (the four PTA points). A gap of 15 dB or more suggests marked high-frequency loss, the most common early sign of noise-induced damage (often a V-shaped notch at 4000 Hz). The result prints the difference directly.
What if I only measured some frequencies?
That is fine. Missing points are skipped by default and both averages use only the measured points, with the ear's measured count shown. Turn off 'allow missing frequencies' to require all nine and get an error instead.
What is the input format?
One point per line as 'ear frequency threshold', separated by spaces or commas. The ear can be 左/右, L/R or left/right; the frequency must be one of 125, 250, 500, 1000, 2000, 3000, 4000, 6000, 8000; thresholds range from −10 to 120 dB HL.
Can it play pure tones in the browser?
This module only interprets thresholds and does not play audio. Pure-tone audiometry must be done in a soundproof booth with a calibrated audiometer by a professional; browser audio and consumer headphones are neither level-calibrated nor frequency-flat, so results cannot be used for diagnosis.
Keywords：听力测试纯音测听PTA听力分级高频损失hearing testaudiogram