Singapore Technologies Engineering has been granted a patent for an innovative acoustic liner design. The liner includes a face sheet, back sheet, and core layer with resonant cells for sound absorption. Each cell wall has a unique surface extension for improved performance. GlobalData’s report on Singapore Technologies Engineering gives a 360-degree view of the company including its patenting strategy. Buy the report here.

According to GlobalData’s company profile on Singapore Technologies Engineering, was a key innovation area identified from patents. Singapore Technologies Engineering's grant share as of February 2024 was 46%. Grant share is based on the ratio of number of grants to total number of patents.

Acoustic liner with cellular structure for noise reduction

Source: United States Patent and Trademark Office (USPTO). Credit: Singapore Technologies Engineering Ltd

A recently granted patent (Publication Number: US11915679B2) discloses an innovative acoustic liner designed for turbofan engines. The acoustic liner comprises a face sheet, a back sheet, and a core layer with a cellular structure placed between them. This core layer consists of first resonant cells, each featuring a unique design with a surface extension that extends from the cell wall towards the face sheet, creating a cavity within the structure. The length of these surface extensions is emphasized, being greater than two times the thickness of the cell wall, contributing to the liner's acoustic properties.

Furthermore, the patent details the application of this acoustic liner in a turbofan engine, specifically along the duct inner wall of the fan duct. The positioning of the liner, whether upstream, downstream, or radially outboard of the fan blades, is highlighted. The design of the first resonant cells, with arcuate extensions and varying lengths of the cell wall base and top edges, is crucial for optimizing the liner's performance in reducing noise levels within the engine. Additionally, the core layer includes second resonant cells, further enhancing the acoustic properties of the liner. Overall, this patented technology offers a novel solution for noise reduction in turbofan engines, potentially improving the overall efficiency and performance of such systems.

To know more about GlobalData’s detailed insights on Singapore Technologies Engineering, buy the report here.

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GlobalData, the leading provider of industry intelligence, provided the underlying data, research, and analysis used to produce this article.

GlobalData Patent Analytics tracks bibliographic data, legal events data, point in time patent ownerships, and backward and forward citations from global patenting offices. Textual analysis and official patent classifications are used to group patents into key thematic areas and link them to specific companies across the world’s largest industries.