The UmboMic: A PVDF Cantilever Microphone
We present the "UmboMic," a prototype piezoelectric cantilever microphone designed for future use with totally-implantable cochlear implants. The UmboMic sensor is made from polyvinylidene difluoride (PVDF) because of its low Young's modulus and biocompatibility. The sensor is designe...
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Main Authors | , , , , , , , , |
Format | Journal Article |
Language | English |
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United States
Cornell University
22.12.2023
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Abstract | We present the "UmboMic," a prototype piezoelectric cantilever microphone designed for future use with totally-implantable cochlear implants.
The UmboMic sensor is made from polyvinylidene difluoride (PVDF) because of its low Young's modulus and biocompatibility. The sensor is designed to fit in the middle ear and measure the motion of the underside of the eardrum at the umbo. To maximize its performance, we developed a low noise charge amplifier in tandem with the UmboMic sensor. This paper presents the performance of the UmboMic sensor and amplifier in fresh cadaveric human temporal bones.
When tested in human temporal bones, the UmboMic apparatus achieves an equivalent input noise of 32.3 dB SPL over the frequency range 100 Hz to 7 kHz, good linearity, and a flat frequency response to within 10 dB from about 100 Hz to 6 kHz.
These results demonstrate the feasibility of a PVDF-based microphone when paired with a low-noise amplifier. The reported UmboMic apparatus is comparable in performance to a conventional hearing aid microphone.
The proof-of-concept UmboMic apparatus is a promising step towards creating a totally-implantable cochlear implant. A completely internal system would enhance the quality of life of cochlear implant users. |
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AbstractList | Objective: We present the "UmboMic," a prototype piezoelectric cantilever
microphone designed for future use with totally-implantable cochlear implants.
Methods: The UmboMic sensor is made from polyvinylidene difluoride (PVDF)
because of its low Young's modulus and biocompatibility. The sensor is designed
to fit in the middle ear and measure the motion of the underside of the eardrum
at the umbo. To maximize its performance, we developed a low noise charge
amplifier in tandem with the UmboMic sensor. This paper presents the
performance of the UmboMic sensor and amplifier in fresh cadaveric human
temporal bones. Results: When tested in human temporal bones, the UmboMic
apparatus achieves an equivalent input noise of 32.3 dB SPL over the frequency
range 100 Hz to 7 kHz, good linearity, and a flat frequency response to within
10 dB from about 100 Hz to 6 kHz. Conclusion: These results demonstrate the
feasibility of a PVDF-based microphone when paired with a low-noise amplifier.
The reported UmboMic apparatus is comparable in performance to a conventional
hearing aid microphone. Significance: The proof-of-concept UmboMic apparatus is
a promising step towards creating a totally-implantable cochlear implant. A
completely internal system would enhance the quality of life of cochlear
implant users. We present the "UmboMic," a prototype piezoelectric cantilever microphone designed for future use with totally-implantable cochlear implants. The UmboMic sensor is made from polyvinylidene difluoride (PVDF) because of its low Young's modulus and biocompatibility. The sensor is designed to fit in the middle ear and measure the motion of the underside of the eardrum at the umbo. To maximize its performance, we developed a low noise charge amplifier in tandem with the UmboMic sensor. This paper presents the performance of the UmboMic sensor and amplifier in fresh cadaveric human temporal bones. When tested in human temporal bones, the UmboMic apparatus achieves an equivalent input noise of 32.3 dB SPL over the frequency range 100 Hz to 7 kHz, good linearity, and a flat frequency response to within 10 dB from about 100 Hz to 6 kHz. These results demonstrate the feasibility of a PVDF-based microphone when paired with a low-noise amplifier. The reported UmboMic apparatus is comparable in performance to a conventional hearing aid microphone. The proof-of-concept UmboMic apparatus is a promising step towards creating a totally-implantable cochlear implant. A completely internal system would enhance the quality of life of cochlear implant users. |
Author | McHugh, Christopher I Yeiser, Aaron J Olson, Elizabeth S Nakajima, Hideko Heidi Wawrzynek, Emma F Graf, Lukas Zhang, John Z Lang, Jeffrey H Kymissis, Ioannis |
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Snippet | We present the "UmboMic," a prototype piezoelectric cantilever microphone designed for future use with totally-implantable cochlear implants.
The UmboMic... Objective: We present the "UmboMic," a prototype piezoelectric cantilever microphone designed for future use with totally-implantable cochlear implants.... |
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Title | The UmboMic: A PVDF Cantilever Microphone |
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