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The nucleus multi-channel implantable hearing prosthesis.

P A Crosby, P M Seligman, J F Patrick

Acta Oto-Laryngologica. Supplementum

|January 1, 1984

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The Nucleus Multi-channel Implantable Hearing Prosthesis uses a 22-channel electrode array for cochlear implantation. This advanced hearing device maps acoustic signals to electrical stimulation for improved auditory perception.

Area of Science:

Biomedical Engineering
Otorhinolaryngology
Neuroscience

Background:

Hearing loss affects millions globally, necessitating advanced assistive devices.
Cochlear implants offer a solution by bypassing damaged hair cells and directly stimulating the auditory nerve.

Purpose of the Study:

To describe the development and technical specifications of the Nucleus Multi-channel Implantable Hearing Prosthesis.
To outline the system's components and their functions in delivering auditory information.

Main Methods:

A 22-channel flexible electrode array is surgically inserted into the cochlea via the round window.
A custom CMOS integrated circuit within the Receiver-Stimulator Unit (RSU) manages biphasic current pulse stimulation.
A speech processor analyzes acoustic signals and encodes them for wireless transmission to the RSU.

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Main Results:

The system supports stimulation rates exceeding 1 kHz for precise auditory nerve activation.
Customizable MAPs (acoustic to stimulation parameter mappings) are created per patient using psychophysical data.
The RSU is hermetically sealed, measuring 34.5 mm in diameter and 10.5 mm thick.

Conclusions:

The Nucleus Multi-channel Implantable Hearing Prosthesis represents a sophisticated system for auditory rehabilitation.
Personalized programming via a dedicated system ensures optimal device performance for individual users.