Ultra-Low-Power Radio Microphone for Cochlear Implant Application

Vaiarello, Y.; Tatinian, William; Leduc, Yves; Veau, Nicolas; Jacquemod, G.

doi:10.1109/jetcas.2011.2177930

Cited by 9 publications

(3 citation statements)

References 13 publications

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“…The advantage of APT over many other approaches is the use of ultrasonic waves at lower frequencies, which allows for smaller receiver and transmitter sizes, lower amplitude, higher penetration range, no electromagnetic delay, strong directionality, and biological protection [39,40]. Many researchers have investigated the use of APT to provide low electrical power to biomedical implants to remove battery replacement problems and minimize the risk for devices in unreachable areas [14,15,41]. An ultrasonically powered implantable micro-oxygen generator (IMOG) capable of in situ tumor oxygenation via water electrolysis, an ultra-low-power 2.45-GHz complementary metaloxide-semiconductor (CMOS) transmitter for cochlear implants and a wireless programmable electronic framework for implantable chronic monitoring of fluorescent-based autonomous biosensors are presented in the mentioned works [14,15,41].…”

Section: Apt Technology and Ipt Technologymentioning

confidence: 99%

A Comparative Review on Acoustic and Inductive Power Transfer

Muhammad Izzul Syafiq Faiz,

Md Rabiul Awal,

Md Rubel Basar

et al. 2024

ARASET

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Wireless Power Transmission (WPT) has emerged as a prominent player in numerous industries recently. It is already established in wireless charging for electric cars and electronic gadgets. However, it has promising applications in medical implants and imaging as well. Among several proposals, Inductive Power Transfer (IPT) and Acoustic Power Transfer (APT) have shown a major impact on this area of interest. This paper presents a comparison between IPT and APT for wireless power transmission (WPT). Most recent proposals are reported, and several key parameters are considered to evaluate the proposals. That includes operating frequencies, separations gaps, powers and power transmission efficiencies and experimental validity. It is found from the review that; a maximum 818 kW of power is transmitted using IPT for electric vehicles. However, APT can transmit 1.068 kW and 5.4 W through wall and in-body medium (implants). Over 90% efficiencies are found for both APT and IPT. In fact, power transfer with 95.66% efficiency over a 6 cm distance of 23.4 W is achieved for APT and 95.6% with 20 cm separation gaps is achieved for IPT for 20 kW power. A wide range of frequencies are applied for both APT and IPT. However, lower frequencies are mostly suitable for high power, more specifically less than MHz ranges. Naturally, lower frequencies are preferable for low power high efficiencies.

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Section: Apt Technology and Ipt Technologymentioning

confidence: 99%

A Comparative Review on Acoustic and Inductive Power Transfer

Muhammad Izzul Syafiq Faiz,

Md Rabiul Awal,

Md Rubel Basar

et al. 2024

ARASET

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show abstract

“…Recent studies have explored the use of UPT to supply low electrical power (e.g. 1 μ W – 10 mW ; Maleki et al, 2011; Vaiarello et al, 2011; Valdastri et al, 2011) to biomedical implants to eliminate battery replacement issues and reduce the risks/maintenance costs for devices in inaccessible areas. For example, Cochran et al (1988) excited piezoelectric elements embedded in a fixation plate to provide current to electrodes placed at fracture sites to promote bone healing.…”

Section: Introductionmentioning

confidence: 99%

Acoustic-electroelastic modeling of piezoelectric disks in high-intensity focused ultrasound power transfer systems

Bhargava

Shahab

2020

Journal of Intelligent Material Systems and Structures

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Contactless ultrasound power transfer (UPT) has emerged as one of the promising techniques for wireless power transfer. Physical processes supporting UPT include the vibrations at a transmitting/acoustic source element, acoustic wave propagation, piezoelectric transduction of elastic vibrations at a receiving element, and acoustic-structure interactions at the surfaces of the transmitting and receiving elements. A novel mechanism using a high-intensity focused ultrasound (HIFU) transmitter is proposed for enhanced power transfer in UPT systems. The HIFU source is used for actuating a finite-size piezoelectric disk receiver. The underlying physics of the proposed system includes the coupling of the nonlinear acoustic field with structural responses of the receiver, which leads to spatial resonances and the appearance of higher harmonics during wave propagation in a medium. Acoustic nonlinearity due to wave kinematics in the HIFU-UPT system is modeled by taking into account the effects of diffraction, absorption, and nonlinearity in the medium. Experimentally-validated acoustic-structure interaction formulation is employed in a finite element based multiphysics model. The results show that the HIFU high-level excitation can cause disproportionately large responses in the piezoelectric receiver if the frequency components in the nonlinear acoustic field coincide with the resonant frequencies of the receiver.

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“…AET systems have been shown to outperform conventional electromagnetic CET technologies [1][2][3][4][5][6] in critical applications [7,8]. In particular, AET has been proposed to recharge and communicate with low-power (e.g., 1µW-10mW) implanted medical devices [9][10][11], which eliminates the need for surgery to replace batteries [11][12][13][14][15][16][17]; to develop battery-free underwater sensing networks to observe ocean conditions, track migration and habitats of marine animals, and monitor oil spills [8,[18][19][20][21][22]. These applications present the need to developing mathematical and numerical models capable of assessing the efficiency of AET systems [23][24][25][26][27][28][29][30][31][32][33][34][35][36][37].…”

Section: Introductionmentioning

confidence: 99%

Analysis and prediction of shock formation in acoustic energy transfer systems

Meesala,

Hajj,

Shahab

2020

Preprint

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Losses associated with nonlinear wave propagation and exhibited by acoustic wave distortion and shock formation compromise the efficiency of contactless acoustic energy transfer systems. As such, predicting the shock formation distance and its dependence on the amplitude of the excitation is essential for their efficiency, design and operation. We present an analytical approach capable of predicting the shock formation distance of acoustic waves generated by a baffled disk with arbitrary deformation in a weakly viscous fluid medium. The loss-less Westervelt equation, used to model the nonlinear wave propagation, is asymptotically expanded based on the amplitude of the excitation. Because the solutions of the first-and second-order equations decay at different rates, we implement the method of renormalization and introduce a coordinate transformation to identify and eliminate the secular terms. The approach yields two partial differential equations that can be solved to predict the formation distance either analytically or numerically much faster than time-domain numerical simulations. The analysis and results are validated with solutions obtained from a nonlinear finite element simulation and previous experimental measurements.

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Ultra-Low-Power Radio Microphone for Cochlear Implant Application

Cited by 9 publications

References 13 publications

A Comparative Review on Acoustic and Inductive Power Transfer

A Comparative Review on Acoustic and Inductive Power Transfer

Acoustic-electroelastic modeling of piezoelectric disks in high-intensity focused ultrasound power transfer systems

Analysis and prediction of shock formation in acoustic energy transfer systems

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