By Joseph R. Abdel Nour, audiologist and student of the Master in Clinical Audiology and Hearing Therapy

Abstract

Hearing aids allow speech understanding in calm atmospheres, but they won’t offer
significant understandability in noise. A Major complaint of hearing impaired people is poor speech understanding when noise is displayed in its different aspects. In the mid of the nineties, the introduction of digital signal processing (DSP) into hearing aids allowed advanced signal processing algorithms to be executed. After nearly a decade a major share of the hearing aids became equipped with DSP technology. Giving great progress to speech understanding in noise, more than half of those hearing aids included directional capabilities with the implementation of directional microphones. The expansion of open canals has spread vastly since feedback cancellation allowed for the diminution of occlusion issues.

So, the question that comes to the surface, what changed to become successful these days?

Technology advanced sufficiently to enable their application in a usable design; multiband compression may possibly be implemented in a small frame and with low noise. Directional microphones vastly progressed, and they were planned to allow exchange between omnidirectional and directional modes to diminish noise issues; feedback cancellation allowed more noticeable gain in open canal hearing aids, and the acoustics were progressing to expand the usable capacity and still resides a huge opportunity for digital technology to supply enhancement.

Keywords:

hearing aid, hearing instrument, hearing aid amplification, child and hearing aid, frequency compression, digital noise processing DNP, digital signal processing DSP, binaural communication, hearing aid development, directionality,

Download the full Research Work: Joseph R. Abdel Nour (2022). Effect of Hearing Aid Evolution on Hearing Impaired perceptibility. SAERA