Acoustic panel

Abstract

This invention relates to a sound-absorbing sheet, which consists of a plurality of sound-absorbing chambers formed by a partition structure inside the sound-absorbing disc body. The side plates of the sound-absorbing disc body have sound-absorbing holes at positions corresponding to these chambers. Each chamber contains a sound-absorbing structure, which forms a sequentially connected entrance channel, a first resonant cavity, an extension channel, and a second resonant cavity. The entrance channel connects to the sound-absorbing holes. The sound-absorbing sheet, through the partition structure and the sound-absorbing structures, forms a series of spatial structures within the sound-absorbing disc body, enabling it to achieve excellent sound absorption. Furthermore, the overall structure of the sound-absorbing sheet is simplified, effectively improving manufacturing convenience and reducing manufacturing costs. It also significantly reduces the overall thickness of the sound-absorbing sheet, broadening its applicability.

Claims

1. A sound-absorbing sheet, comprising: a sound-absorbing disc body, the interior of which is divided into a plurality of sound-absorbing chambers by a compartmentalized structure, each of the sound-absorbing chambers including a connected entrance section and an extension section, and the plurality of sound-absorbing chambers being arranged in a rotationally symmetrical configuration, a plurality of sound-absorbing holes being formed on a side plate of the sound-absorbing disc body, each of the sound-absorbing holes being connected to the entrance section of the sound-absorbing chamber at a corresponding position; and a plurality of sound-absorbing structures, which are respectively disposed in each of the sound-absorbing chambers and respectively form an entrance channel, a first resonant cavity, an extension channel and a second resonant cavity in each of the sound-absorbing chambers, the entrance channel being located in the entrance section of the sound-absorbing chamber and connected to the sound-absorbing holes, the first resonant cavity being located in the entrance section and connected to the entrance channel, the extension channel being located in the extension section and connected to the first resonant cavity, and the extension channel extending away from the entrance section, and the second resonant cavity being located in the extension section and connected to the extension channel.

2. The sound-absorbing sheet as claimed in claim 1, wherein each of the sound-absorbing structures includes an inlet baffle, an inner baffle, and an outer baffle. The inlet baffle is formed within the inlet section of the sound-absorbing disc and frames the inlet channel. The first resonant cavity surrounds the inlet baffle. The inner baffle and the outer baffle are formed within the extension section of the sound-absorbing disc and respectively connect the inner and outer sides of the compartment structure. The extension channel is formed between the inner baffle and the outer baffle. The inner baffle, the outer baffle, and the compartment structure of the sound-absorbing disc enclose the second resonant cavity.

3. The sound-absorbing sheet as described in claim 2, wherein the inlet baffle includes a barrier baffle, an inner baffle and an outer baffle, the inner baffle and the outer baffle are connected to the two ends of the barrier baffle and extend toward the extension interval.

4. The sound-absorbing sheet as claimed in claim 2, wherein the inner enclosure wall includes an inner partition plate and an inner extension plate, the inner partition plate being connected to the inner perimeter of the compartment structure, and the inner extension plate extending from the inner partition plate toward the end of the extension section; the outer enclosure wall includes an outer partition plate and an outer extension plate, the outer partition plate being connected to the outer perimeter of the compartment structure, and the outer extension plate extending from the outer partition plate toward the end of the extension section.

5. The sound-absorbing sheet as claimed in claim 3, wherein the inner enclosure wall includes an inner partition plate and an inner extension plate, the inner partition plate being connected to the inner perimeter of the compartment structure, and the inner extension plate extending from the inner partition plate toward the end of the extension section; the outer enclosure wall includes an outer partition plate and an outer extension plate, the outer partition plate being connected to the outer perimeter of the compartment structure, and the outer extension plate extending from the outer partition plate toward the end of the extension section.

6. The sound-absorbing sheet as described in any one of claims 1 to 5, wherein the inlet channel and the extension channel of each of the sound-absorbing structures are curved channels.

7. The sound-absorbing sheet as described in any one of claims 1 to 5, wherein the sound-absorbing disc body includes an outer ring portion formed around the periphery of the plurality of sound-absorbing chambers, the outer ring portion forming a plurality of outer ring chambers inside the outer ring portion, and a plurality of micropores formed on one side plate of the sound-absorbing disc body, the plurality of micropores being distributed in the outer ring portion and respectively communicating with the plurality of outer ring chambers.

8. The sound-absorbing sheet as claimed in claim 6, wherein the sound-absorbing disc body includes an outer ring portion formed around the plurality of sound-absorbing chambers, the outer ring portion forming a plurality of outer ring chambers inside the outer ring portion, and a plurality of micropores formed on one side plate of the sound-absorbing disc body, the plurality of micropores being distributed in the outer ring portion and respectively communicating with the plurality of outer ring chambers.

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