device for the transfer of sound in river or kanalsohlen

摘要

The clay outlet cross-section of an opening (10) has a non-rectangular shape such that the smaller side boundaries (11,12), coupling the horizontal boundary edges (13,14) are partly horizontal or slightly inclined, but mutually complementary. The small outlet boundaries of the outlet cross-section are first aligned vertically, then almost horizontally, and finally again vertically, when viewed from top. All transitions of the outlet cross-section may be rounded.