Sound damping device for gas-guiding pipe, particularly for exhaust pipe of exhaust gas system of motor vehicle, has vibratory membrane, which stays in acoustic connection with gas-guiding pipe at coupling-out point

摘要

The sound damping device (13) has a vibratory membrane (17), which stays in acoustic connection with the gas-guiding pipe at a coupling-out point (40). Another vibratory membrane (19) stays in acoustic connection with a pressure compensation pipe at an excitation point (41). The acoustic distance between the coupling-out point and the coupling point (42) is equal to the acoustic distance between the excitation point and the coupling point.