A multi-channel hearing prosthesis for profound-to-total hearing loss

Area of Science:

• Biomedical Engineering
• Neuroscience
• Audiology

Background:

• Hearing loss significantly impacts communication and quality of life.
• Existing cochlear implant technologies aim to restore auditory function.
• Advanced signal processing is crucial for effective speech perception in cochlear implant users.

Purpose of the Study:

• To develop and evaluate a novel multi-channel cochlear implant hearing prosthesis.
• To assess the speech perception capabilities of postlingually deaf patients using the new device.
• To determine the benefits of the cochlear implant in conjunction with lipreading.

Main Methods:

• Development of a 22-channel cochlear implant with a single-chip receiver-stimulator using CMOS technology.
• Implementation of a pocket-sized speech processor extracting signal amplitude, fundamental frequency, and formant frequency.
• Clinical trial involving four postlingually deaf patients with profound-total hearing loss.

Main Results:

• Patients achieved open-set speech recognition for various word lists and sentences.
• Significant improvements in speech perception were observed when using the cochlear prosthesis with lipreading.
• The device demonstrated effective processing of speech parameters like fundamental and formant frequencies.

Conclusions:

• The developed multi-channel cochlear implant is effective in restoring speech recognition in postlingually deaf individuals.
• The prosthesis offers a significant advantage when combined with lipreading, enhancing overall auditory rehabilitation.
• This technology represents a promising advancement in hearing restoration for severe hearing loss.