FIELD: physics.
SUBSTANCE: hollow rectangular depressions are formed on the contact boundary in a medium with higher acoustic resistance, where total relative area β and depth l of said depressions are set based on given relationships.
EFFECT: high degree of acoustic matching of media for one direction of propagation of sound through a media contact boundary and high degree of acoustic mismatch of media for the opposite direction of propagation of sound.
2 cl, 1 dwg
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