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Abstract:A microphone for fully implantable hearing device was generally implanted under the skin of the temporal bone. So, the implanted microphone's characteristics can be affected by the accompanying noise due to masticatory movement. In this paper, the implantable microphone with 2-channels structure was designed for reduction of the generated noise signal by masticatory movement. And an experimental model for generation of the noise by masticatory movement was developed with considering the characteristics of huma… Show more
“…This configuration has also been mentioned in some patents [ 59 , 60 ]. A possible arrangement of two ECMs into a single unit, presented in a subsequent study [ 61 ], is shown in Fig. 4 .…”
Section: Description Of Implantable Sensorsmentioning
confidence: 99%
“…3 Carina parts of TIHA Carina (Adapted from [ 48 ], available from PubMed Central) Fig. 4 Subcutaneous microphones scheme of combined subcutaneous microphones (Adapted from [ 61 ], available from Korea Institute of Science and Technology Information) …”
Section: Description Of Implantable Sensorsmentioning
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.
“…This configuration has also been mentioned in some patents [ 59 , 60 ]. A possible arrangement of two ECMs into a single unit, presented in a subsequent study [ 61 ], is shown in Fig. 4 .…”
Section: Description Of Implantable Sensorsmentioning
confidence: 99%
“…3 Carina parts of TIHA Carina (Adapted from [ 48 ], available from PubMed Central) Fig. 4 Subcutaneous microphones scheme of combined subcutaneous microphones (Adapted from [ 61 ], available from Korea Institute of Science and Technology Information) …”
Section: Description Of Implantable Sensorsmentioning
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.
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