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• W2964868922 abstract "Isolators, devices with unidirectional wave transmission, are integral components in computing networks, enabling a one-way division of a large system into independent subunits. Isolators are created by breaking the inversion symmetry between a source and a receiver, known as reciprocity. In acoustics, a steady flow of the background medium in which sound travels can break reciprocity, but significant isolation is typically achieved only for large, often impractical speeds. This article proposes acoustic isolator designs enabled by duct flow that do not require large flow velocities. A basic isolator design is simulated based on the acoustic analogue of a Mach-Zehnder interferometer, with monomodal entry and exit ports. The simulated device footprint is then reduced by using bimodal ports. Further, a nonuniform velocity profile combined with a grating to induce phononic transitions is considered, which, combined with filters, can provide significant isolation. By coupling a waveguide with flow to free space through an array of small apertures, largely nonreciprocal leaky-wave radiation is demonstrated, breaking the symmetry between reception and transmission patterns of an acoustic linear aperture array. These investigations open interesting pathways towards efficient acoustic isolation, which may be translated into integrated acoustic and surface acoustic waves, as well as phononic technology." @default.
• W2964868922 created "2019-08-13" @default.
• W2964868922 creator A5005375790 @default.
• W2964868922 creator A5006383148 @default.
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• W2964868922 date "2019-07-01" @default.
• W2964868922 modified "2023-10-13" @default.
• W2964868922 title "Nonreciprocal acoustic propagation and leaky-wave radiation in a waveguide with flow" @default.
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• W2964868922 doi "https://doi.org/10.1121/1.5115018" @default.
• W2964868922 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/31370591" @default.
• W2964868922 hasPublicationYear "2019" @default.
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