{"id":161774,"date":"2026-07-22T14:30:22","date_gmt":"2026-07-22T14:30:22","guid":{"rendered":"https:\/\/pabau.com\/?p=161774"},"modified":"2026-08-12T13:57:33","modified_gmt":"2026-08-12T13:57:33","slug":"hearing-test-frequency","status":"publish","type":"post","link":"https:\/\/pabau.com\/fr\/blog\/hearing-test-frequency\/","title":{"rendered":"Hearing test frequency: What Hz ranges mean in audiometry"},"content":{"rendered":"
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Key Takeaways<\/h3>\n <\/div>\n
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Hearing test frequency refers to the Hz ranges used in audiometry – standard clinical tests cover 250 Hz to 8,000 Hz across eight octave points<\/p>\n <\/div>\n

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Normal adult hearing spans 20 Hz to 20,000 Hz, but sensitivity narrows with age – adults over 65 typically lose clear access above 8,000 Hz<\/p>\n <\/div>\n

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Reading an audiogram means understanding two axes: frequency (Hz) on the horizontal and hearing threshold (dB HL) on the vertical, with normal hearing defined as under 20 dB HL by the WHO<\/p>\n <\/div>\n

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Pabau’s digital forms and automated recall workflows help audiology and ENT practices manage hearing assessments, documentation, and follow-up appointments in one place<\/p>\n <\/div>\n <\/div>\n <\/div>\n \n\n\n

One in eight Americans over age 12 has hearing loss in both ears, according to the National Institute on Deafness and Other Communication Disorders, or NIDCD<\/a>. Yet most people cannot explain what their audiogram results mean.<\/p>\n\n\n\n

Understanding hearing test frequency<\/strong> is the first step toward interpreting those results accurately, whether you are a patient reviewing your own chart or a clinician communicating findings to a patient.<\/p>\n\n\n\n

This guide covers the standard frequency ranges used in audiometry, how audiograms display threshold data, how normal ranges shift with age, and what the high-frequency zone tells clinicians about early hearing damage. It also looks at complementary tests that sit beyond the standard pure tone protocol.<\/p>\n\n\n\n

Hearing test frequency explained: what Hz means in audiometry<\/h2>\n\n\n\n

Frequency, measured in hertz (Hz), describes how many sound wave cycles occur per second. High Hz values correspond to high-pitched sounds; low Hz values correspond to low-pitched sounds. During a hearing test, frequency determines which pitch<\/em> is being assessed at any given moment.<\/p>\n\n\n\n

Decibels (dB) measure loudness. In audiometry, the specific unit is dB HL (hearing level), calibrated to the average threshold of a young, healthy adult. A threshold of 0 dB HL does not mean silence; it means the softest sound detectable by a person with normal hearing at that frequency.<\/p>\n\n\n\n

Together, these two axes form the audiogram, which is the standard output of a speech therapy practice management<\/a> workflow and any audiology assessment. Every point plotted on that chart represents the softest sound heard at a specific frequency. Audiology practices often track these thresholds over time using measurements tracking over time<\/a>, which makes subtle progressive changes visible across appointments.<\/p>\n\n\n\n

What frequencies are tested in a standard hearing test?<\/h2>\n\n\n\n

Standard pure tone audiometry tests eight frequencies, all within the 250 Hz to 8,000 Hz range. This window covers almost all of spoken language. Each frequency maps to a distinct real-world sound category.<\/p>\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n
Frequency<\/th>\nPitch category<\/th>\nReal-world sound example<\/th>\nClinical importance<\/th>\n<\/tr>\n<\/thead>\n
250 Hz<\/td>\nVery low<\/td>\nRumble of a large engine<\/td>\nBaseline low-frequency anchor<\/td>\n<\/tr>\n
500 Hz<\/td>\nLow<\/td>\nMale vowels, bass guitar<\/td>\nVowel perception in speech<\/td>\n<\/tr>\n
1,000 Hz<\/td>\nMid<\/td>\nDial tone, typical speaking voice<\/td>\nCore speech intelligibility zone<\/td>\n<\/tr>\n
2,000 Hz<\/td>\nMid-high<\/td>\nConsonants like \u00ab\u00a0s\u00a0\u00bb, \u00ab\u00a0sh\u00a0\u00bb, \u00ab\u00a0f\u00a0\u00bb<\/td>\nConsonant clarity, word distinction<\/td>\n<\/tr>\n
3,000 Hz<\/td>\nMid-high<\/td>\nFemale speech, children’s voices<\/td>\nUsed in pure tone average calculation<\/td>\n<\/tr>\n
4,000 Hz<\/td>\nHigh<\/td>\nHigh-pitched telephone ring<\/td>\nFirst zone affected by noise damage<\/td>\n<\/tr>\n
6,000 Hz<\/td>\nHigh<\/td>\nBird calls, sibilant consonants<\/td>\nEarly noise and age-related loss marker<\/td>\n<\/tr>\n
8,000 Hz<\/td>\nVery high<\/td>\nCymbal shimmer, high whistle<\/td>\nUpper limit of standard protocol<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n\n\n\n

The pure tone average (PTA), commonly used to classify hearing loss severity, is typically calculated from thresholds at 500, 1,000, 2,000, and 3,000 Hz, according to ASHA’s pure tone audiometry guidelines<\/a>. Some protocols use only 500, 1,000, and 2,000 Hz, so clinicians should confirm which convention applies when reviewing a report.<\/p>\n\n\n\n

How to read an audiogram: Axes, markers, and what the results mean<\/h2>\n\n\n\n

An audiogram is a two-axis chart. Frequency runs along the horizontal axis, lowest Hz on the left (250 Hz) and highest on the right (8,000 Hz). Hearing threshold level runs vertically, with softer sounds near the top (0 dB HL) and louder sounds toward the bottom (120 dB HL).<\/p>\n\n\n\n

A point plotted high on the chart means the patient heard a very soft sound, indicating good sensitivity. A point plotted low means they needed a louder sound to perceive it.<\/p>\n\n\n\n

Clinicians use two standard markers: \u00ab\u00a0O\u00a0\u00bb for the right ear (red) and \u00ab\u00a0X\u00a0\u00bb for the left ear (blue). Each marker shows the threshold at that frequency.<\/p>\n\n\n\n

Normal patient record management<\/a> in audiology practices includes storing these baseline audiograms alongside a client information<\/a> record, then comparing results at annual reviews.<\/p>\n\n\n\n

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Comprehensive EMR & patient record management<\/em><\/figcaption><\/figure>\n\n\n\n
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The speech banana: Why the 250-8,000 Hz zone matters most<\/h3>\n\n\n\n

The \u00ab\u00a0speech banana\u00a0\u00bb is the region on an audiogram where most conversational sounds cluster, roughly 250 Hz to 8,000 Hz horizontally and 25 dB to 65 dB vertically. It gets its name from the banana-like shape this cluster creates when plotted on a standard audiogram.<\/p>\n\n\n\n

Different sounds occupy different parts of the speech banana. Low-frequency vowels (\u00ab\u00a0ah\u00a0\u00bb, \u00ab\u00a0oo\u00a0\u00bb) sit in the bottom-left. High-frequency consonants (\u00ab\u00a0s\u00a0\u00bb, \u00ab\u00a0f\u00a0\u00bb, \u00ab\u00a0th\u00a0\u00bb, \u00ab\u00a0sh\u00a0\u00bb) sit in the upper-right. A patient whose thresholds fall below the banana’s lower edge at high frequencies will struggle with consonant clarity even if they can hear that someone is speaking.<\/p>\n\n\n\n

Degrees of hearing loss by frequency and decibel level<\/h2>\n\n\n\n

The World Health Organization (WHO)<\/a> classifies hearing loss using a four-frequency pure tone average, calculated from thresholds at 500, 1,000, 2,000, and 4,000 Hz in the better-hearing ear. This grading system comes from the WHO’s 2021 World Report on Hearing and replaced the organization’s earlier severity scale. These categories apply regardless of whether the loss is sensorineural, conductive, or mixed.<\/p>\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n
Classification<\/th>\nThreshold (dB HL)<\/th>\nFunctional impact<\/th>\n<\/tr>\n<\/thead>\n
Normal<\/td>\nUnder 20 dB HL<\/td>\nFull access to conversational speech<\/td>\n<\/tr>\n
Mild<\/td>\n20-34 dB HL<\/td>\nDifficulty with soft speech, distant voices<\/td>\n<\/tr>\n
Moderate<\/td>\n35-49 dB HL<\/td>\nConversations require raised voice or repetition<\/td>\n<\/tr>\n
Moderately severe<\/td>\n50-64 dB HL<\/td>\nLoud speech difficult without amplification<\/td>\n<\/tr>\n
Severe<\/td>\n65-79 dB HL<\/td>\nCannot follow conversation without hearing aids<\/td>\n<\/tr>\n
Profound<\/td>\n80-94 dB HL<\/td>\nVery limited functional hearing without intervention<\/td>\n<\/tr>\n
Complete\/total<\/td>\n95 dB HL or greater<\/td>\nNo functional hearing without a cochlear implant or similar intervention<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n\n\n\n

These thresholds represent average loss across the tested frequencies. A patient may show normal thresholds at 250-1,000 Hz but moderate loss at 4,000-8,000 Hz. That pattern is characteristic of high-frequency hearing loss, which requires separate interpretation rather than a single PTA figure.<\/p>\n\n\n\n

Documenting these frequency-specific patterns accurately in patient intake forms<\/a> helps practitioners track progression at each return visit. Patients whose thresholds reach moderate loss or beyond are typically referred for a hearing aid evaluation<\/a> to determine appropriate amplification.<\/p>\n\n\n\n

High-frequency hearing test: What the 2,000-8,000 Hz zone reveals<\/h2>\n\n\n\n

High-frequency hearing loss, defined as elevated thresholds in the 2,000-8,000 Hz range, is the most common pattern audiologists encounter. It is typically the first zone to deteriorate because the outer hair cells in the cochlea that process high-frequency sounds are positioned at the base, where they receive the most mechanical stress.<\/p>\n\n\n\n

Three causes account for most cases:<\/p>\n\n\n\n