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  1. No Access

    Chapter and Conference Paper

    State-Space Modeling of Nonlinear Electrostatic Transducers and Experimental Characterization Using LDV

    Electrostatic speakers and ultrasound transmitters, including capacitive micromachined ultrasound transducers (CMUTs), may be thought of as systems with applied voltage as the input variable and diaphragm disp...

    Yuqi Meng, **aoyu Niu, Randall P. Williams… in Nonlinear Structures & Systems, Volume 1 (2024)

  2. No Access

    Chapter and Conference Paper

    Measurement of Airborne Ultrasound Using Laser Doppler Vibrometry

    The speed of light in air is dependent on the air’s instantaneous density. Since air density is modulated by sound, sound in the air can be observed and measured using optical methods. One such optical method ...

    Zihuan Liu, **aoyu Niu, Yuqi Meng… in Computer Vision & Laser Vibrometry, Volume… (2024)

  3. No Access

    Chapter and Conference Paper

    Magnetoelastic Vibration Sensors

    In this work, we explore the application of magnetoelasticity towards the realization of vibration transducers. Such sensors have unique and complementary properties when compared against more conventional tra...

    Ehsan Vatankhah, Connor Hodges, **aoyu Niu… in Sensors & Instrumentation and Aircraft/Aer… (2024)