@article{0294d2a1c34f4cba8f51c8ec50403af9,
title = "Experimental study of an implantable fiber-optic microphone on human cadavers",
abstract = "In this paper, we present the results of an experimental study about a novel fiber optical vibrometer, aimed to be used as a totally implantable fiber-optic microphone for hearing aids. The sensor head, implanted inside the human cadaver middle ear, detects the amplitude of the incus vibrations, which are produced by an external acoustical source. The probe beam of coherent vertical cavity surface emitting laser (VCSEL) radiation is directed to the incus and the phase-modulated reflected beam is captured and demodulated. The problem of interferometric fading was solved using two quasi-quadrature signals, passively produced by the 3 × 3 single-mode fiber-optic coupler, processed by a special embedded algorithm. The implanted optoelectronic module works with very low-power consumption, performs real-time signal processing and outputs an analogue signal proportional to the incus vibration. The amplitude of the incus vibrations at different sound pressure levels (SPL) from 40 to 90 dB and at frequencies from 100 Hz to 10 kHz were measured by the implanted system. The system was evaluated on five cadaver skulls. The measured amplitudes were in the range of 1 pm to 5 nm, depending on the subjected skull and the applied sound pressure.",
keywords = "Cadaver, Cochlear Implants, Ear, Middle, Humans, Prosthesis Design, Transducers, Vibration",
author = "Zoran Djinovi{\'c} and Robert Pavelka and Milo{\v s} Tomi{\'c} and Georg Sprinzl and M{\"u}ller, {Julia Gertrud} and Hannes Traxler",
note = "Funding Information: The authors thank the Nieder{\"o}sterreichische Forschungs- & Bildungsgesellschaft (NFB) for sponsoring this work by Life Science grant: LS14-026 and ACMIT Gmbh for the support of the project. M. T. thanks to Ministry of Education, Science and Technological Development of Serbia to support him in this investigation, in the frame of the agreement 451-03-68/2020-14/200175 with ITS-SASA. We further thank Julia Dworan and the deceased Istvan Paraszti for their help in preparing the cadaver heads and material in the Center of Anatomy. Finally, we thank Nina Tomic for preparing the figures. Funding Information: The authors thank the Nieder{\"o}sterreichische Forschungs- & Bildungsgesellschaft (NFB) for sponsoring this work by Life Science grant: LS14-026 and ACMIT Gmbh for the support of the project. M. T. thanks to Ministry of Education, Science and Technological Development of Serbia to support him in this investigation, in the frame of the agreement 451-03-68/2020-14/200175 with ITS-SASA. We further thank Julia Dworan and the deceased Istvan Paraszti for their help in preparing the cadaver heads and material in the Center of Anatomy. Finally, we thank Nina Tomic for preparing the figures. Publisher Copyright: {\textcopyright} 2021",
year = "2021",
month = oct,
doi = "10.1016/j.heares.2021.108351",
language = "English",
volume = "410",
pages = "108351",
journal = "Hearing Research",
issn = "0378-5955",
publisher = "Elsevier",
}