access icon free Output pressure enhancement of CMUTs by using multiple Helmholtz resonance apertures

Multiple Helmholtz resonance apertures are proposed to enhance the output pressure of air-coupled capacitive micromachined ultrasonic transducers (CMUTs) for non-contact ultrasound imaging applications. The methodologies of defining the design parameters of CMUTs and the resonant apertures on the membrane of CMUTs are discussed. In comparing certain configurations of resonant apertures with conventional CMUTs, simulation results show that a prospective improvement of output pressure (up to 32.1%) can be achieved.

Inspec keywords: ultrasonic transducers; acoustic resonance; ultrasonic imaging

Other keywords: air-coupled capacitive micromachined ultrasonic transducers; CMUT; noncontact ultrasound imaging; multiple Helmholtz resonance apertures

Subjects: Nonlinear acoustics and macrosonics; Transduction; devices for the generation and reproduction of sound; Measurement by acoustic techniques; Ultrasonics, quantum acoustics, and physical effects of sound; Sonic and ultrasonic transducers and sensors

References

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      • 4. Cao, X.W., Jin, B., Yu, Y.Y., et al: ‘Initial design of the capacitive micromachined ultrasonic transducers (cmut) with Helmholtz resonance aperture’. 1st Global Conf. on Biomedical Engineering and 9th Asian-Pacific Conf. on Medical and Biological Engineering, Tainan, Taiwan, October 2014, Vol. 47, pp. 192195.
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      • 9. Apte, N., Park, K.K., Khuri-Yakub, B.T.: ‘Finite element analysis of CMUTs with pressurized cavities’. 2012 IEEE Int. Ultrasonics Symp. (IUS), Dresden, Germany, October 2012, pp. 979982.
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      • 3. Mills, D.M., Smith, L.S.: ‘Real-time in-vivo imaging with capacitive micromachined ultrasound transducer (cMUT) linear arrays’. Proc. of 2003 IEEE Ultrasonics Symp., Honolulu, HI, USA, October 2003, Vols 1 and 2, pp. 568571.
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Errata
An Erratum has been published for this content:
Erratum: ‘Output pressure enhancement of CMUTs by using multiple Helmholtz resonance apertures’