Implementation of implantable microphone in the middle ear cavity and telemetry module

Author(s):  
S. H. Arman Woo ◽  
Hui-Sup Cho ◽  
Il Hyung Luke Park ◽  
Byung Seop Song

2013 ◽  
Vol 49 (13) ◽  
pp. 784-786 ◽  
Author(s):  
S.H.A. Woo ◽  
J.W. Lee ◽  
I‐Y. Park ◽  
B.S. Song


2021 ◽  
Vol 29 ◽  
pp. 399-413
Author(s):  
Jyung Hyun Lee ◽  
Dong Wook Kim ◽  
Ki Woong Seong ◽  
Myoung Nam Kim ◽  
Jin-Ho Cho

BACKGROUND AND OBJECTIVE: Recently, with the increase in the population of hearing impaired people, various types of hearing aids have been rapidly developed. In particular, a fully implantable middle ear hearing device (F-IMEHD) is developed for people with sensorineural hearing loss. The F-IMEHD system comprises an implantable microphone, a transducer, and a signal processor. The signal processor should have a small size and consume less power for implantation in a human body. METHODS: In this study, we designed and fabricated a signal-processing chip using the modified FFT algorithm. This algorithm was developed focusing on eliminating time delay and system complexity in the transform process. The designed signal-processing chip comprises a 4-channel WDRC, a fitting memory, a communication 1control part, and a pulse density modulator. Each channel is separated using a 64-point fast Fourier transform (FFT) method and the gain value is matched using the fitting table in the fitting memory. RESULTS AND CONCLUSION: The chip was designed by Verilog-HDL and the designed HDL codes were verified by Modelsim-PE 10.3 (Mentor graphics, USA). The chip was fabricated using a 0.18 μm CMOS process (SMIC, China). Experiments were performed on a cadaver to verify the performance of the fabricated chip.



Author(s):  
KARL-BERND HÜTTENBRINK ◽  
THOMAS ZAHNERT ◽  
MATTHIAS BLAU ◽  
GERT HOFMANN


Sensors ◽  
2019 ◽  
Vol 19 (5) ◽  
pp. 1117
Author(s):  
Ki Seong ◽  
Ha Mun ◽  
Dong Shin ◽  
Jong Kim ◽  
Hideko Nakajima ◽  
...  

To develop totally implantable middle ear and cochlear implants, a miniature microphone that is surgically easy to implant and has a high sensitivity in a sufficient range of audio frequencies is needed. Of the various implantable acoustic sensors under development, only micro electro-mechanical system-type acoustic sensors, which attach to the umbo of the tympanic membrane, meet these requirements. We describe a new vibro-acoustic hybrid implantable microphone (VAHIM) that combines acceleration and sound pressure sensors. Each sensor can collect the vibration of the umbo and sound pressure of the middle ear cavity. The fabricated sensor was implanted into a human temporal bone and the noise level and sensitivity were measured. From the experimental results, it is shown that the proposed method is able to provide a wider-frequency band than conventional implantable acoustic sensors.



2013 ◽  
Vol 15 (5) ◽  
pp. 867-877 ◽  
Author(s):  
S. H. Arman Woo ◽  
Seong Tak Woo ◽  
Byung Seop Song ◽  
Jin-Ho Cho


2010 ◽  
Vol 19 (5) ◽  
pp. 361-368 ◽  
Author(s):  
Eui-Sung Jung ◽  
Ki-Woong Seong ◽  
Hyung-Gyu Lim ◽  
Jang-Woo Lee ◽  
Dong-Wook Kim ◽  
...  


2016 ◽  
Vol 21 (5) ◽  
pp. 333-345 ◽  
Author(s):  
Philippe P. Lefebvre ◽  
Javier Gisbert ◽  
Domenico Cuda ◽  
Stéphane Tringali ◽  
Arnaud Deveze

Objective: To summarise treatment outcomes compared to surgical and patient variables for a multicentre recipient cohort using a fully implantable active middle ear implant for hearing impairment. To describe the authors' preferred surgical technique to determine microphone placement. Study Design: Multicentre retrospective, observational survey. Setting: Five tertiary referral centres. Patients: Carina recipients (66 ears, 62 subjects) using the current Cochlear® Carina® System or the legacy device, the Otologics® Fully Implantable Middle Ear, with a T2 transducer. Methods: Patient file review and routine clinical review. Patient outcomes assessed were satisfaction, daily use and feedback reports at the first fitting and ≥12 months after implantation. Descriptive and statistical analysis of correlations of variables and their influence on outcomes was performed. Independently reported preferred methods for microphone placement are collectively summarised. Results: The average implant experience was 3.5 years. Satisfaction increased significantly over time (p < 0.05). No correlation with covariates examined was observed. Feedback significantly decreased over time, showing a significant correlation with microphone location, primary motivation, gender, age at implantation, and contralateral hearing aid use (p < 0.05). Patient satisfaction was inversely correlated with reports of system feedback (p < 0.05). The implantable microphone was most commonly on the posterior inferior mastoid line, in 42/66 (65%) cases, correlating with less likelihood for feedback and consistent with author surgical preference. Conclusion: Carina recipients in this study present as satisfied consistent daily users with very few reports of persistent feedback. As microphone location is an influencing factor, a careful surgical consideration of microphone placement is required. The authors prefer a posterior inferior mastoid line position whenever possible.



1965 ◽  
Vol 8 (3) ◽  
pp. 223-234 ◽  
Author(s):  
William Melnick

Five subjects with normal middle ear mechanisms, and otosclerotic patients, before and after stapedectomy, matched the loudness of their voices to the loudness of a 125-cps-sawtooth noise. The results showed loudness matching functions with gradual slopes, less than 1.00, for the normal subjects and the patients prior to stapedectomy. Post-surgically, the loudness function for the patients increased in steepness to considerably more than 1.00. These results are explained, most logically, in terms of increased sensitivity of the altered middle ear to sound energy generated by the listener’s own voice.





1998 ◽  
Vol 23 (3) ◽  
pp. 265-265 ◽  
Author(s):  
Hutton ◽  
Birchall ◽  
French ◽  
Kubba ◽  
Severn ◽  
...  


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