Apparatus and method for an active and programmable acoustic metamaterial
US-9525944-B2 · Dec 20, 2016 · US
Noise reduction device
US9020159B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-9020159-B2 |
| Application number | US-64173209-A |
| Country | US |
| Kind code | B2 |
| Filing date | Dec 18, 2009 |
| Priority date | Dec 26, 2008 |
| Publication date | Apr 28, 2015 |
| Grant date | Apr 28, 2015 |
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Abstract
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A noise control device includes the following structural elements. A signal memory records both of a noise signal supplied from a noise microphone and an error signal supplied from an error microphone. A filter coefficient calculator calculates a fixed filter coefficient of a control filter by using data recorded in the signal memory. A filter coefficient renewing section renews, at a given timing, a filter coefficient set at a fixed filter in a control filter to a filter coefficient read out from the filter coefficient calculator.
First claim
Opening claim text (preview).
What is claimed is: 1. A noise control device for reducing a given noise arriving at a control point by radiating a control sound toward the control point, the noise control device comprising: a controlling noise detector for detecting the given noise and outputting a controlling noise signal; a control filter for processing the controlling noise signal supplied from the controlling noise detector by using a fixed filter coefficient set in advance, and thereby outputting a contr…
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Physics · mapped topic
Physics · mapped topic
Physics · mapped topic
Physics · mapped topic
- G10K11/1786Primary
Physics · mapped topic
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- What does patent US9020159B2 cover?
- A noise control device includes the following structural elements. A signal memory records both of a noise signal supplied from a noise microphone and an error signal supplied from an error microphone. A filter coefficient calculator calculates a fixed filter coefficient of a control filter by using data recorded in the signal memory. A filter coefficient renewing section renews, at a given tim…
- Who is the assignee on this patent?
- Mori Keiji, Kano Hiroyuki, Maeda Tsuyoshi, and 2 more
- What technology area does this patent fall under?
- Primary CPC classification G10K11/1786. Mapped technology areas include Physics.
- When was this patent published?
- Publication date Tue Apr 28 2015 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 8 related publications on this page (citations in our corpus or others sharing the same primary CPC).