Electromechanical sound production device e.g. electromechanical fanfare, for producing sound in motor vehicle, has membrane vibrated for producing tones of different frequencies, where frequencies are resonant frequencies of device

摘要

The device (1) has a membrane (2) asymmetrically provided with a suspension (9), where the suspension produces asymmetrical vibration modes in center and/or at an edge (8) of the membrane. The membrane is vibrated for producing tones of different frequencies, where the frequencies are resonant frequencies of the device. A pressure chamber (4) is assigned to the membrane, where the chamber includes sound direction guidance elements. An acoustic horn (5) is assigned to a housing (3) that partly surrounds the membrane, where the horn has folding and/or jump discontinuity.