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US 12,725,597 B2Granted
Sound absorbing device for moving body
AssigneeHonda Motor Co., Ltd.
InventorsShunji Suzuki, Hayato Kojima, Yuma Tsuboi
Life of this patent
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Abstract
A sound absorbing device for a moving body includes a resonance tube, a variable elastic membrane, and an adjustment part. The resonance tube has a pipeline, one end portion of which is disposed to face an indoor space. The variable elastic membrane has one surface disposed so as to face an indoor space and the other surface disposed so as to face an internal space of other end portion of the resonance tube. The adjustment part adjusts an elastic modulus of the variable elastic membrane.
Claims8
A sound absorbing device for a moving body comprising:
- a resonance tube having a pipeline, in which one end portion of the pipeline is disposed to face an indoor space;
- a variable elastic membrane in which one surface is disposed so as to face the indoor space and in which another surface is disposed so as to face an internal space of another end portion of the resonance tube;
- and
- an adjustment part configured to adjust an elastic modulus of the variable elastic membrane,
- the pipeline comprises a tapered portion in which an opening area of an inside of the other end portion of the resonance tube is gradually increased toward the variable elastic membrane.
2 more elements
Dependencies are inferred from the claim text.