Publication

Micro-actuator for new implantable hearing device

Yves Perriard, Hans Bernhard
2006
Conference Papers

Abstract

A new hearing therapy called Direct Acoustical Cochlear Stimulation (DACS) was developed and validated in a first clinical trial with four patients. The key component of this therapy based on an implantable hearing device is a micro-actuator that is implanted in the mastoid right behind the external auditory canal of a patient. It generates vibrations that are directly coupled to the inner ear fluids and bypass therefore the outer and the middle ear. This allows treating severe to profound mixed hearing loss. The hermetically sealed actuator was designed to provide maximal output power by keeping the overall size small enough to be placed in the mastoid. An analytical model was used to simulate the dynamic characteristics of the actuator in order to adjust them to the transfer function of a human middle ear. The geometric parameters of the actuator were optimized using unite element modeling. © 2006 IEEE.

Official source

https://infoscience.epfl.ch/entities/publication/1eb747c2-93ea-4a21-838e-b6602c85bd6b

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Yves Perriard, Hans Bernhard
2006
Conference Papers

Abstract

Official source

https://infoscience.epfl.ch/entities/publication/1eb747c2-93ea-4a21-838e-b6602c85bd6b

About this result

Related concepts (32)

Ear

An ear is the organ that enables hearing and (in mammals) body balance using the vestibular system. In mammals the ear is usually described as having three parts: the outer ear, the middle ear and the inner ear. The outer ear consists of the pinna and the ear canal. Since the outer ear is the only visible portion of the ear in most animals, the word "ear" often refers to the external part alone. The middle ear includes the tympanic cavity and the three ossicles.

Ear canal

The ear canal (external acoustic meatus, external auditory meatus, EAM) is a pathway running from the outer ear to the middle ear. The adult human ear canal extends from the pinna to the eardrum and is about in length and in diameter. The human ear canal is divided into two parts. The elastic cartilage part forms the outer third of the canal; its anterior and lower wall are cartilaginous, whereas its superior and back wall are fibrous. The cartilage is the continuation of the cartilage framework of pinna.

Outer ear

The outer ear, external ear, or auris externa is the external part of the ear, which consists of the auricle (also pinna) and the ear canal. It gathers sound energy and focuses it on the eardrum (tympanic membrane). Auricle (anatomy) The visible part is called the auricle, also known as the pinna, especially in other animals. It is composed of a thin plate of yellow elastic cartilage, covered with integument, and connected to the surrounding parts by ligaments and muscles; and to the commencement of the ear canal by fibrous tissue.

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Micro-actuator for new implantable hearing device

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