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Acoustic Holographic Reconstruction with Metamaterials

Value Proposition
To date, most acoustic holographic reconstruction techniques rely on transducer arrays with large numbers of active elements, requiring sophisticated phase shifting circuits, large power consumption and careful calibration and tuning. Therefore, passive acoustic holograms, that are similar to conventional optical holograms, can greatly simplify the system and significantly reduce the overall cost.

Technology
A new Duke invention which uses passive metamaterials as subwavelength pixels for holographic reconstruction. It requires only a single transducer, without cumbersome circuitry, thus significantly reduced system complexity and power consumption. A prototype was demonstrated around 4kHz audible frequency range. This metasurface holograms can serve as versatile platforms for various advanced acoustic wave manipulation and signal modulation, leading to new possibilities in acoustic sensing, energy deposition, medical diagnostic imaging and haptic holography.

Applications

  • Wireless ultrasound transfer, e.g. wireless power transfer
  • Ultrasonic sensors for smart vehicles
  • Medical therapeutic ultrasound applications
  • Audio speakers

Advantages

  • Compact and simple design
  • Less power consumption
  • Low cost

Duke File (IDF) Number

T-004904

Inventor(s)

  • Xie, Yangbo
  • Cummer, Steven
  • Jing, Yun
  • Shen, Chen

Patents

    • Patent Number: PCT/US2017/048419
    • Title: SYSTEMS AND METHODS FOR 2D ACOUSTIC METASURFACE FOR HOLOGRAPHIC RECONSTRUCTION
    • Country: United States of America

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College

Pratt School of Engineering

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