Metamaterial sound absorbing structures for unwanted wave phenomenon reduction inside the loudspeaker enclosure designed with the optimization and deep neural networks methods
Project financed by The National Center for Research and Development, agreement no. LIDER/11/0065/L-12/20/NCBR/2021 signed 09.12.2021r,
Loudspeaker enclosures are the essential electroacoustic topic present in the scientific reports since 1971, when N. Thiele published his research on electrodynamic loudspeakers in the closed enclosure. Many modern and more advanced papers were published describing the acoustic field inside the loudspeaker enclosure, but the unwanted acoustic wave phenomenons remain unsolved. The new technology development in structural acoustic metamaterials allowed us to research the application of those modern sound-absorbing structures in electroacoustics. In contrast, the recent research presented by KEF Industries confirmed its applicability.
The presented project is aimed to design optimized metamaterial structures to solve the critical problems in loudspeaker enclosure, such as driver back radiation, standing waves, and resonances occurrence inside the enclosure or resonant noise of the air close din the bass-reflex port. Using modern design methods, such as neural networks and genetic algorithm optimization, we planne design and prototyping metamaterial structures with 3D printing techniques. In cooperation with speakers’ head manufacturers in Poland, Pylon Audio, and NAW Speakers, we planned testing and development of proposed structures.
The project’s effect would be a vast extension of the knowledge in designing and applying for metamaterial structures in the place of traditional, fiber, or porous absorbers inside the loudspeaker enclosures. Proposed technologies and products present great potential in commercialization and including new design trends in electroacoustic design.
Project value: 1 497 437.50 PLN
Project crew: dr inż. Bartłomiej Chojnacki, mgr inż. Aleksandra Chojak, mgr inż. Julia Idczak, mgr inż. Jan Pawlik, mgr inż. Wojciech Binek
Project Manager: dr inż. Bartłomiej Chojnacki
Contact: bchojnacki@agh.edu.pl
