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:
Sep. 01, 2026
Filed:
Jun. 13, 2024
Aac Microtech (Changzhou) Co., Ltd., Changzhou, CN;
Zhongyang Wang, Changzhou, CN;
Jie Zhang, Changzhou, CN;
Hezhi Wang, Changzhou, CN;
Chao Wang, Changzhou, CN;
AAC Microtech (Changzhou) Co., Ltd., Changzhou, CN;
Abstract
Disclosed is a sound-absorbing material, a method, and a speaker, a sound-absorbing slurry is frozen by using a freezing conveyor belt, and the sound-absorbing slurry is then molded by a mold or coated onto a film. During pre-cooling of the sound-absorbing slurry in a first freezing zone of the conveyor belt, temperatures of the mold and a carrier film are reduced, followed by rapid freezing in a second freezing zone. Pre-cooling the mold in advance ensures uniform freezing of the sound-absorbing slurry. The freezing time of the material may be controlled by adjusting the speed of the conveyor belt. A temperature gradient is formed between the freezing conveyor belt and hot air thereabove. This enhances the top-bottom permeability of the sound-absorbing material, and thus improves the performance of the sound-absorbing material. The preparation efficiency of sound-absorbing material is increased, thereby facilitating scalable mass production is facilitated.