Vibrational strength of piezoelectric array in flexible substrates for conductive hearing aids

Enosh Lim; Antonia X. DeBastiani; Miriam Redleaf; Mohammad J. Moghimi

doi:10.1117/12.3012677

12 March 2024 Vibrational strength of piezoelectric array in flexible substrates for conductive hearing aids

Enosh Lim, Antonia X. DeBastiani, Miriam Redleaf, Mohammad J. Moghimi

Proceedings Volume 12837, Microfluidics, BioMEMS, and Medical Microsystems XXII; 1283704 (2024) https://doi.org/10.1117/12.3012677
Event: SPIE BiOS, 2024, San Francisco, California, United States

Abstract

Flexible hearing aids can benefit from piezoelectric actuators to generate vibrations on epidermis layer of skin behind the ear and noninvasively bypass conductive hearing loss. However, the major challenge is to generate a strong level of vibrations on the surface of skin that can reach cochlea with thin and low-power actuators. Lead zirconium titanate has a high piezoelectric constant and can generate vibrations with elevated levels of force and acceleration. In this paper, we assembled arrays of unimorph piezoelectric actuators composed of lead zirconium titanate to increase the vibration level and overcome damping in flexible substrate, skin, and bone. Finite element analysis was conducted to study the vibrations from a single actuator as well as an array of actuators. Also, the experimental data showed that an array of two actuators with adjusted phase increased the velocity of vibrations by 18 dB at 9 kHz compared to a single actuator on a flat aluminum foundation.

Conference Presentation

(2024) Published by SPIE. Downloading of the abstract is permitted for personal use only.

Citation Download Citation

Enosh Lim, Antonia X. DeBastiani, Miriam Redleaf, and Mohammad J. Moghimi "Vibrational strength of piezoelectric array in flexible substrates for conductive hearing aids", Proc. SPIE 12837, Microfluidics, BioMEMS, and Medical Microsystems XXII, 1283704 (12 March 2024); https://doi.org/10.1117/12.3012677

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