Related Experiment Video
Updated: Jun 23, 2026
09:44
Neuro-rehabilitation Approach for Sudden Sensorineural Hearing Loss
Published on: January 25, 2016
Hearing aids and cochlear damage: the case against fitting the pure tone audiogram
1Department of Audiology, Massachusetts Eye and Ear Infirmary, Boston, MA, USA. cfhalpin@meei.harvard.edu
Summary
This study suggests hearing aids should provide flat, undistorted gain for cochlear disorders, prioritizing measurable word recognition over patient complaints. Accommodating the damaged cochlea is recommended over complex audiogram fitting.
Area of Science:
- Audiology
- Hearing Science
- Biomedical Engineering
Background:
- Current hearing aid technology often relies on fitting gain to audiograms.
- Improvements in hearing aid technology frequently address patient-reported complaints rather than objective performance metrics.
Purpose of the Study:
- To propose an alternative approach to hearing aid amplification.
- To challenge conventional industry practices in hearing aid fitting.
- To improve measurable word recognition performance in patients with cochlear disorders.
Main Methods:
- Analyzing the pathophysiology of cochlear disorders.
- Evaluating the efficacy of flat, undistorted gain across all frequencies.
- Comparing amplification strategies based on audiogram fitting versus flat gain.
Main Results:
- Many cases of cochlear disorders may benefit more from flat, undistorted gain.
- Current technological advancements often prioritize subjective patient satisfaction over objective performance.
- Reversing audiometric test results may be less effective than accommodating the damaged cochlea.
Conclusions:
- A paradigm shift in hearing aid amplification is proposed, focusing on accommodating cochlear damage.
- Flat, undistorted gain is suggested as a superior amplification strategy for many cochlear disorder cases.
- Future hearing aid development should prioritize measurable improvements in word recognition.
Related Concept Videos
01:13The Cochlea
The cochlea is a coiled structure in the inner ear that contains hair cells—the sensory receptors of the auditory system. Sound waves are transmitted to the cochlea by small bones attached to the eardrum called the ossicles, which vibrate the oval window that leads to the inner ear. This causes fluid in the chambers of the cochlea to move, vibrating the basilar membrane.
01:31Hearing
When we hear a sound, our nervous system is detecting sound waves—pressure waves of mechanical energy traveling through a medium. The frequency of the wave is perceived as pitch, while the amplitude is perceived as loudness.
01:21Perceiving Loudness, Pitch, and Location
The human brain perceives pitch through two primary mechanisms reflected in place theory and frequency theory. Each mechanism describes how sound waves are interpreted as specific pitches by the brain, offering insights into the intricate processes of auditory perception.
Place theory, or place coding, suggests that different pitches are heard because various sound waves activate specific locations along the cochlea's basilar membrane. The brain determines the pitch of a sound by identifying...
Place theory, or place coding, suggests that different pitches are heard because various sound waves activate specific locations along the cochlea's basilar membrane. The brain determines the pitch of a sound by identifying...