- Patent Title: Composite article for mitigating noise, vibration, and harshness
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Application No.: US16124926Application Date: 2018-09-07
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Publication No.: US11120783B2Publication Date: 2021-09-14
- Inventor: Seongchan Pack , Su Jung Han , Martin S. Kramer
- Applicant: GM Global Technology Operations LLC
- Applicant Address: US MI Detroit
- Assignee: GM Global Technology Operations LLC
- Current Assignee: GM Global Technology Operations LLC
- Current Assignee Address: US MI Detroit
- Agency: Quinn IP Law
- Main IPC: G10K11/168
- IPC: G10K11/168 ; B32B5/02 ; B32B15/14 ; B32B3/30 ; B32B3/12

Abstract:
A composite article configured for mitigating noise, vibration, and harshness includes a substrate having a first stiffness. The composite article includes a structural film formed from a composition and disposed on the substrate in a pattern that is arranged to dampen a sound wave having a first frequency and a first amplitude and propagatable in a first direction to a second frequency that is less than the first frequency and a second amplitude that is less than the first amplitude. The composite article includes a coating layer disposed on the pattern and configured to dampen the sound wave in the first direction and in a second direction that is perpendicular to the first direction. The composite article has a second stiffness that is greater than the first stiffness. A method of forming the composite article is also described.
Public/Granted literature
- US20200082803A1 COMPOSITE ARTICLE FOR MITIGATING NOISE, VIBRATION, AND HARSHNESS Public/Granted day:2020-03-12
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