A new rapid assessment method can estimate how people perceive loudness in just five minutes, paving the way for more precisely tailored hearing device settings that match individual listening preferences.

One of the persistent challenges in hearing aid fitting is the subjective nature of how people experience sound. What sounds pleasant to one person may be uncomfortably loud to another. Audiologists have long relied on standardized loudness assessment procedures, but these tests can be time-consuming and demanding for older adults already dealing with hearing challenges.

A new study published in Ear and Hearing demonstrates that a fast, adaptive procedure can deliver reliable loudness measurements in a fraction of the time it traditionally takes, opening up possibilities for more personalized device programming in the clinic and potentially in home settings.

Background: Why the Researchers Looked at This

Hearing aids work best when they match the wearer's individual loudness preferences. Every person's ears respond to sound differently, and loudness perception varies with age, hearing history, and other factors. Traditionally, audiologists map loudness by having patients rate pure tones at different volumes across multiple frequencies. This "categorical loudness scaling" is accurate but can require 300 or more trials spread over an hour.

For older adults, who may experience fatigue, concentration lapses, or frustration during prolonged testing, a faster method could improve both accuracy and comfort. A faster procedure also opens doors to remote hearing aid fitting and self-fitting platforms, where speed and ease are essential.

How the Study Was Done

The researchers developed and tested a new rapid procedure called quick-Categorical Loudness Scaling (qCLS). Using Bayesian adaptive logic, the procedure learns from each patient response and selects the next test stimulus intelligently, converging on the person's loudness profile much faster than conventional methods.

In the first experiment, 41 older adults (average age mid-60s) completed the qCLS procedure twice in the same session to assess test-retest reliability. They heard pure tones at frequencies from 250 Hz to 8 kHz and rated how loud each was using an 11-point scale. Each session took approximately five minutes and required only 100 stimulus trials.

In the second experiment, 10 adults compared the qCLS results with the traditional Adaptive Categorical Loudness Scaling (ACALOS) method. The qCLS took 100 trials; ACALOS took 300 trials. Agreement between the two methods was measured to validate the accuracy of the faster approach.

What the Researchers Found

The qCLS procedure proved highly reliable. When the same participants were tested twice on the same day, the average difference between test and retest measurements was just 6.3 dB across all frequencies and loudness levels. This level of consistency is considered satisfactory for clinical applications.

When compared to the traditional ACALOS procedure, the qCLS estimates agreed very closely, with an average difference of only 5.1 dB. This finding suggests that the faster method captures loudness growth just as accurately as the slower, more exhaustive standard approach. In other words, the Bayesian adaptive algorithm effectively eliminates redundant testing while maintaining precision.

Critically, the procedure completed in about five minutes. This dramatic time reduction means older adults can complete loudness profiling without fatigue, and the assessment can be deployed in a wider range of settings, from clinic to home to direct-to-consumer hearing aid platforms.

What It Means for People with Hearing Loss

Rapid loudness profiling directly improves the hearing aid fitting experience. When a device can be tuned to match a person's exact loudness preferences at multiple frequencies, the wearer is more satisfied with their device and more likely to wear it consistently. Dissatisfaction with loudness settings remains a leading reason people stop wearing their hearing aids or seek adjustments.

For older adults who may have mobility issues or cognitive concerns, a five-minute assessment is far less burdensome than hour-long fittings. For those who prefer self-guided fitting, faster loudness assessment makes it feasible to calibrate devices at home before or without a clinic visit.

Why Fast, Accurate Loudness Profiling Powers Better Hearing Solutions

The study's demonstration that loudness profiling can be completed reliably in five minutes directly enables the kind of customized signal processing that modern hearing devices promise. Over-the-counter hearing aids and advanced self-fitting platforms depend on fast, accurate measurement of individual hearing profiles. Panda Quantum, for example, includes a clinically tuned 10-minute online hearing test and digital noise reduction that can be tailored to the wearer's loudness preferences. With rapid loudness profiling available, self-fitting platforms can now offer not just basic frequency response but true personalization of dynamic range compression and loudness mapping.

This rapid assessment also opens the door to iterative, user-driven fitting. Rather than one clinic session, users can assess loudness multiple times, adjusting their device settings based on real-world experience in different environments. This flexibility is particularly valuable for OTC and direct-to-consumer devices where ongoing clinic support may not be available.

Limitations of This Research

The study tested the procedure primarily in controlled laboratory settings with older adults who had varying degrees of hearing loss. The generalizability to younger adults or to people with severe or profound hearing loss is unclear. Additionally, the study assessed loudness profiling in quiet, acoustically controlled environments, not in the diverse acoustic scenarios people encounter in daily life.

The procedure also assumes that users can reliably rate loudness on an 11-point scale. People with cognitive decline or language barriers might find this challenging, limiting the applicability of the method for some populations.

Where This Leaves Us

Fast, reliable loudness profiling removes a significant barrier to personalized hearing device fitting. As over-the-counter and self-fitting hearing aids expand, tools like the qCLS procedure make it practical to deliver the kind of customization that was once the exclusive domain of clinic-based, professional fitting. For older adults seeking comfortable, personalized hearing solutions without lengthy clinical appointments, this rapid assessment opens new possibilities.

Shen Y, Petersen EA, Neely ST. Rapid Profiling of Loudness Among Older Adults. Ear and Hearing, January 27, 2026. Retrieved from PubMed. DOI: 10.1097/AUD.0000000000001766