A resonator-integrated duct includes: a duct portion through which intake air flows, and a resonator chamber integrally formed with the duct portion and in contact with the duct portion so that an outer wall of the duct portion serves as a partition wall. ...

A resonator chamber (23) communicates with a main flow cross-section (14). The separating plane (31) between the top and side walls of a resonator chamber lie outside the wall (15) forming the main flow cross-section.

A method for production of a semiconductor package which enables uniform conduction processing for all through holes covered by the conduction processing without being limited to any specific structure, is free from surface relief shapes and internal voids...

The noise attenuator consists of a number of annular chambers (6) positioned one after another round a section (5) of the intake pipe (3) and connected to it through apertures (7) to establish a link in the air flow between the pipe and the chambers. The c...