Patent ID: 11910154
Assignee: INFINEON TECHNOLOGIES AG
Field: Audio-visual technology (Electrical engineering)
Classification: CPC H  B | IPC B  H

Claim 0:
1. A MEMS device comprising:
a package having an inner volume;
a MEMS microphone located in the inner volume;
a sound port through the package to the inner volume; and
a passive acoustic attenuation filter acoustically coupled to the sound port,
wherein the passive acoustic attenuation filter comprises a tube element branching off from the sound port,
wherein the sound port and the tube structure are integrated into a substrate portion of the MEMS device,
wherein the tube element has a tube inlet acoustically coupled to the sound port, the tube inlet corresponding to a cross-sectional area of the tube having a width, and wherein the width is substantially smaller than a length of the tube element.