A technical review and evaluation of implantable sensors for hearing devices
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Authors
Calero, D.
Paul, S.
Gesing, A.
Alves, F.
Cordioli, J.A.
Subjects
Cochlear implant
Hearing aids
Implantable transducers
Subcutaneous microphone
Piezoelectric sensor
Accelerometer
MEMS sensor
Hearing aids
Implantable transducers
Subcutaneous microphone
Piezoelectric sensor
Accelerometer
MEMS sensor
Advisors
Date of Issue
2018-02
Date
2018-02
Publisher
BioMed
Language
Abstract
Most commercially available cochlear implants and hearing aids use microphones as sensors for capturing the external sound field. These microphones are in general located in an external element, which is also responsible for processing the sound signal. However, the presence of the external element is the cause of several problems such as discomfort, impossibility of being used during physical activities and sleeping, and social stigma. These limitations have driven studies with the goal of developing totally implantable hearing devices, and the design of an implantable sensor has been one of the main challenges to be overcome. Different designs of implantable sensors can be found in the literature and in some commercial implantable hearing aids, including different transduction mechanisms (capacitive, piezoelectric, electromagnetic, etc), configurations microphones, accelerometers, force sensor, etc) and locations (subcutaneous or middle ear). In this work, a detailed technical review of such designs is presented and a general classification is proposed. The technical characteristics of each sensors are presented and discussed in view of the main requirements for an implantable sensor for hearing devices, including sensitivity, internal noise, frequency bandwidth and energy consumption. The feasibility of implantation of each sensor is also evaluated and compared.
Type
Article
Description
The article of record as published may be found at https://doi.org/10.1186/s12938-018-0454-z
Series/Report No
Department
Organization
Identifiers
NPS Report Number
Sponsors
FINEP
CAPES
CAPES
Funder
Format
26 p.
Citation
Calero, Diego, et al. "A technical review and evaluation of implantable sensors for hearing devices." Biomedical engineering online 17.1 (2018): 23.
Distribution Statement
Rights
This publication is a work of the U.S. Government as defined in Title 17, United States Code, Section 101. Copyright protection is not available for this work in the United States.