The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 15, 2025
Filed:
Aug. 30, 2022
Acer Incorporated, New Taipei, TW;
Jia-Ren Chang, New Taipei, TW;
Po-Jen Tu, New Taipei, TW;
Ruey-Ching Shyu, New Taipei, TW;
Kai-Meng Tzeng, New Taipei, TW;
Feng-Ming Liu, New Taipei, TW;
ACER INCORPORATED, New Taipei, TW;
Abstract
An electronic system includes a system air outlet, a heat sink, a fan and an acoustic filter. The acoustic filter is disposed between the system air vent and the heat sink and includes a front duct, a back duct and a single expansion chamber. A sound-receiving opening of the front duct is in airtight connection with the heat sink, and the sound-emitting opening of the back duct is in airtight connection with the system air vent. The single expansion chamber is disposed between the front duct and the back duct, and is located between the sound-emitting opening of the front duct and the sound-receiving opening of the back duct. The cross-sectional area of the single expansion chamber is larger than the cross-sectional area of an air outlet of the fan for generating reflective acoustic waves having a cut-off frequency so as to cancel noise generated by the fan.