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
