Loudness discomfort
estimator

Method notes

What a clinical LDL means

A loudness discomfort level, often shortened to LDL, is a measurement made during a controlled audiology procedure. A clinician presents sounds through a calibrated transducer and asks the listener to identify the level at which the sound becomes uncomfortably loud. The procedure may use pure tones, speech, different frequencies, different step sizes, and a defined instruction. The result is expressed in a clinical unit such as dB HL under the conditions of that test.

This page cannot reproduce those conditions. A browser does not know the output sensitivity of your headphones, the fit of an earbud, the volume setting of the operating system, the output path, or the acoustic level at the eardrum. It cannot turn a JavaScript gain value into dB HL. For that reason, the tool uses nominal sequence labels only and repeats the warning before playback and on the result screen.

How the relative sequence is built

The sequence has ten labels: 50, 55, 60, 65, 70, 75, 80, 85, 90, and 95 dB HL. The label for step n is calculated as 50 + 5 × (n - 1). This mirrors the five dB rising presentation used in a published normal-hearing LDL study, which began at 50 dB and continued in five dB steps until the listener reported initial discomfort. The matching of labels is transparent, but the browser output is not calibrated.

The tone itself is a 1 kHz sine wave. Each preview is scheduled for 2 seconds, matching the short presentation length used in one published LDL method. The listener can replay a step, continue to the next step, report discomfort, or stop. The page records only the chosen step in the current tab and does not create a medical record.

How the software cap works

The software master gain is capped at 0.030 relative amplitude. Step 1 begins at 0.003, and each later step adds 0.003 until step 10 reaches the cap. In simplified form, the gain is min(0.030, 0.003 + 0.003 × (step - 1)). These values are browser amplitude values, not sound pressure levels. The cap limits the gain created by this page but cannot control the volume set by your computer, phone, operating system, headphones, amplifier, or speaker.

A cap is not calibration. It is a software boundary that reduces the chance of an abrupt high gain inside the page. Keep the device output low before starting and do not change the device volume to chase a particular nominal label. If the tone is too quiet to hear, stop and use a calibrated assessment instead of raising the output until discomfort appears.

What published LDL ranges show

Reports in people without sound tolerance problems

A 2005 study of 59 adults with normal hearing and without sound tolerance problems reported LDL estimates on the order of 100 dB HL and described substantial variation between listeners. A 2006 study of 64 normal-hearing participants reported median values from 86 to 98 dB HL across the tested stimuli. These figures are useful context for the literature, but they are not one universal normal range and they do not convert the browser result into dB HL.

Reports in hyperacusis research

Research involving people with hyperacusis has reported lower average LDL values than a normal-hearing reference group in some samples. One study reported average values around 85 dB HL across the tested frequencies. Other papers point out that LDL methods vary and that LDL alone is not sensitive or specific enough to serve as a single classification test. The important lesson is not a cutoff. It is that sound tolerance assessment needs a history, defined clinical method, and professional interpretation.

Why the browser caveat changes the interpretation

If two people select step 7, the result does not mean they heard the same acoustic level. Their headphones may have different output, their device volume controls may differ, and their ear canal fit may change the level. Even one person can obtain a different step after changing headphones, browser, room, or device. Repeating the page can show whether your response is consistent with the same setup, but consistency would still be relative.

The nominal label can help you describe the procedure to an audiologist: “I reported discomfort at the seventh relative step in a browser sequence using my usual headphones.” It should not be described as “my LDL is 80 dB HL.” That statement would turn a sequence label into a clinical measurement that the page did not make.

How to use the result

If you report discomfort at an early step, stop the session and write down the setup, including headphones, device, volume setting, frequency, and whether the sound was uncomfortable or painful. If you continue through all ten steps, record that no discomfort step was selected. Neither result confirms or rules out a sound-tolerance condition. The result is a prompt for a better question, not an answer on its own.

An audiologist can measure hearing thresholds and loudness discomfort using calibrated equipment. The clinician can also ask whether the issue is physical discomfort, pain, annoyance, fear, sound-specific aversion, or a change in tinnitus. Those experiences are not interchangeable, and a single tone step cannot separate them. An otolaryngologist may be relevant when there is an ear symptom, sudden hearing change, severe dizziness, or another concern that needs medical review.

Safety, privacy, and stop rules

Use the stop control at any time. Stop immediately for pain, sharpness, dizziness, nausea, a sudden increase in tinnitus, or a feeling that the sound is unsafe. The page stops the oscillator with a short fade and shows a result screen without requiring you to continue. Do not use the tool in a loud room, while driving, or when you need to hear alarms or other safety signals.

The page does not record microphone input, does not upload the tone response, and does not save a clinical profile. The current step exists in the open page only. Closing the tab removes the session state. The site may record generic page use through its existing site analytics, but it does not need the selected step to run the tone.

Why a step is not a cutoff

A cutoff would imply that one number separates people with and without a sound-tolerance condition. The literature does not support that use for this page. LDL results depend on frequency, presentation time, step size, instructions, transducer, hearing threshold, attention, and the listener's description of discomfort. A person may respond differently to a pure tone, speech, music, a sudden sound, or a sound that has a personal meaning.

The browser sequence also has a built-in order effect. Every session begins at the lowest nominal label and rises. A listener may become more alert to the tone as the steps continue, or may stop because the tone is tiring rather than physically uncomfortable. A second session can therefore differ even before any change in hearing. Write down the reason for stopping if you repeat the page.

What to tell an audiologist

Bring the relative step, but also bring the conditions. Note the device, headphones, operating-system volume, browser, room, and whether the left or right ear felt different. Describe the sensation in plain words: pressure, sharpness, pain, annoyance, fear, strain, or a change in tinnitus. Say whether the response happened immediately or only after several repetitions. These details are more useful than turning the nominal label into a dB HL claim.

An audiologist can decide whether a calibrated LDL procedure is appropriate and can pair it with pure-tone thresholds, speech measures, tympanometry, or another part of a hearing assessment. The clinician can also discuss whether the concern is hyperacusis, misophonia, phonophobia, tinnitus-related distress, an ear symptom, or another sound experience. These terms describe different questions, and the browser page cannot choose among them.

Why the sources do not create one normal number

The cited studies use different participants and procedures. One normal-hearing study reported values from 86 to 98 dB HL, while another described estimates on the order of 100 dB HL. A hyperacusis study reported lower average LDL values in its sample, but another paper notes that LDL and related measures have variable methods and lack a single agreed cutoff. A source-backed range is therefore a frame for a conversation, not a target that a listener must reach.

The page uses the sources to explain the difference between a clinical measurement and a relative browser response. It does not import a published threshold into the JavaScript and call it a diagnosis. The only recorded value is the step the listener selects, and the nominal label is shown beside it so the arithmetic remains visible.

Questions about the estimator

Sources