A brain-controlled system may help listeners with hearing loss cut through the noise
NPR • • health
Key Points:
- Researchers have developed a "brain-controlled hearing aid" that decodes a person's brain waves to identify and amplify the voice they want to hear in noisy environments, addressing the cocktail party problem.
- The system was tested on four individuals with typical hearing who had electrodes implanted for epilepsy treatment; it successfully detected the target conversation up to 90% of the time and improved comprehension while reducing listening effort.
- The technology leverages a neural signature in the auditory cortex that tracks the sound a listener focuses on, allowing the device to adjust volumes accordingly in real time.
- Experts caution that the approach's effectiveness for people with hearing loss remains uncertain due to potentially weaker brain signals, but it represents a promising advancement beyond current hearing aids that cannot selectively amplify specific voices.
- With hearing loss affecting more than half of people aged 75 and older, such innovations could significantly improve assistive listening devices and cochlear implants, addressing a critical and growing need.