Acoustic absorber for fan noise reduction

Number of patents in Portfolio can not be more than 2000

United States of America Patent

PATENT NO 11459921
APP PUB NO 20200284174A1
SERIAL NO

16296403

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Abstract

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A sound suppression assembly is provided for absorbing acoustic energy from an air circulation device. The assembly includes an air circulation device, such as an axial fan, and a plurality of sparsely-arranged two-sided Helmholtz unit cells disposed in a periodic array. Each unit cell includes a lossy resonator and a lossless resonator. The lossy resonator includes a first chamber portion bounded by at least one first boundary wall defining a first chamber volume, and a first neck forming an opening in the first chamber portion. The lossless resonator includes a second chamber portion bounded by at least one second boundary wall defining a second chamber volume, and a second neck forming an opening in the second chamber portion. The unit cells can be positioned in a circular pattern with the first neck of the lossy resonators directed to a source of acoustic energy from the air circulation device.

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Patent Owner(s)

Patent OwnerAddress
TOYOTA JIDOSHA KABUSHIKI KAISHA1 TOYOTA-CHO TOYOTA-SHI AICHI-KEN 471-8571

International Classification(s)

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Dede, Ercan Mehmet Ann Arbor, US 176 1306
Iizuka, Hideo Ann Arbor, US 71 396
Lee, Taehwa Ann Arbor, US 72 90

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