Patent ID: 7487857

Claim:
Apparatus for sonic coupling between an intake tract or engine compartment and a vehicle interior of a motor vehicle, having a housing into which sound enters from said intake tract or engine compartment via a first line and out of which sound exits into said vehicle interior via a second line, said apparatus further having a transmission body for sound that is arranged in said housing such that the sound enters or impinges said transmission body via said first line, a gas-tight separating wall between a sound inlet into said housing and a sound outlet out of said housing, the position of said separating wall being held constant by a positioning apparatus, and a transmission wall between said separating wall and said housing, via which an acoustic transfer function of said transmission body for sonic coupling is adjustable, wherein said transmission wall is joined to or is integral with said separating wall, and wherein said separating wall, at least in one area, runs generally perpendicular to the longitudinal axis of sound propagation at at least one of said inlet or outlet of said housing, and said transmission wall, at least in one area, runs at an angle α to the longitudinal axis of the sound propagation at at least one of said inlet or outlet of said housing.