Adjustable Hearing Aid with Frequency Compression for Clear Speech Perception

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Researchers at Purdue University have developed an algorithm that establishes parameters for audio signals in hearing aids based on a patient's severity of hearing loss. The ability to distinguish between high and low frequencies allows for faster user response, easing every day conversations as well as patient lifestyles. Hearing aids have been adapted to lower frequency through Hybrid Expansive Frequency Compression (hEFC) methods; however, hEFC technology often confuses between high and low frequencies. In addition, hEFC based systems cannot filter background noise and rarely recognize soft sounds like frication. Often, individuals with high frequency hearing loss will start to rely on memory of sounds, which leads to misidentification of phonemes. Purdue University has integrated new technology into hearing aids that keeps different sounds separate and enhances fricatives, affricates, and stop constant barriers.

-Faster signal time
-Eliminates need for frequency remapping
-Identifies spectral prominence of sound

Potential Applications:
-Hearing aids
-Assistive biotechnology

Technology Validation:
The new device uses a spectral balance between bandwidth filtered energy of input sound between 2500-4500 Hz and a high-bandpass filter with energy above 4500 Hz such that very high or low sound frequencies can be remapped and corrected before they are delivered.
Jun 1, 2020
United States

Jun 17, 2019
United States
Purdue Office of Technology Commercialization
The Convergence Center
101 Foundry Drive, Suite 2500
West Lafayette, IN 47906

Phone: (765) 588-3475
Fax: (765) 463-3486