A family of impedance profiles is derived that keeps sound travelling at the background speed inside mismatched acoustic lenses, reducing dispersion and reflections at mid and high frequencies.
Whewell, The Cambridge and Dublin Mathematical Journal, Vol
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Non-dispersive graded impedance acoustic lenses
A family of impedance profiles is derived that keeps sound travelling at the background speed inside mismatched acoustic lenses, reducing dispersion and reflections at mid and high frequencies.