Confined Fluid Analyzed with Near-field Acoustic Detection

Electric and Near-Field Acoustic Detection, A Monograph

The articles concern my recent work on the electric sense of sharks and rays. I have greatly advanced my theory of electromagnetic orientation, its theoretical foundations, and its application to the animals. I have furthermore developed a guided-approach algorithm explaining how sharks and rays cue in on the source of an electric field. Moreover, I have discovered in the electroreceptors a nov...

Near-field acoustic streaming jet.

A numerical and experimental investigation of the acoustic streaming flow in the near field of a circular plane ultrasonic transducer in water is performed. The experimental domain is a parallelepipedic cavity delimited by absorbing walls to avoid acoustic reflection, with a top free surface. The flow velocities are measured by particle image velocimetry, leading to well-resolved velocity profi...

Near-Field Acoustic Holography: The Frame Drum

A phase-sensitive setup for near-field acoustic holography was established in order to determine the characteristic resonance modes of a vibrating membrane. The experiment was carried out using a frame drum as the vibrating system of interest. By exciting the membrane at certain fundamental frequencies and recording the complex signals from the pressure and particle velocity fields across the d...

Near field acoustic holography with particle velocity transducers

Design and fabrication of a high-Q near-field probe for subsurface crack detection

Non-destructive detection and evaluation of invisible cracks in metal structures is an important matter in several critical environments including ground transportation, air transportation and power plants. In this paper, a high-Q near-field Microwave probe is designed and fabricated using defected ground structures for surface and subsurface crack detection in metal structures. For this purpos...