title: An acoustic filter based on layered structure.
abstract: Acoustic filters (AFs) are key components to control wave propagation in multi-frequency systems. We present a design which selectively achieves acoustic filtering with a stop band and passive amplification at the high- and low-frequencies, respectively. Measurement results from the prototypes closely match the design predictions. The AF suppresses the high frequency aliasing echo by 14.5 dB and amplifies the low frequency transmission by 8.0 dB, increasing an axial resolution from 416 to 86μm in imaging. The AF design approach is proved to be effective in multi-frequency systems.
authors.forename: Jianguo
authors.identifier: 0000-0002-7522-1014
authors.initials: J
authors.lastname: Ma
authors.affiliation: Department of Electrical and Computer Engineering, North Carolina State University , Raleigh, North Carolina 27695, USA.
authors.forename: Michael B
authors.initials: MB
authors.lastname: Steer
authors.affiliation: Department of Mechanical and Aerospace Engineering, North Carolina State University , Raleigh, North Carolina 27695, USA.
authors.forename: Xiaoning
authors.identifier: 0000-0003-3605-3801
authors.initials: X
authors.lastname: Jiang
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