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מכשיר הגנת שמיעה עם קרן אקוסטית מפותלת
专利权人:
3M INNOVATIVE PROPERTIES COMPANY
发明人:
申请号:
IL25351317
公开号:
IL253513A
申请日:
2017.07.16
申请国别(地区):
IL
年份:
2019
代理人:
摘要:
An earpiece body with a convoluted acoustic horn and a hearing protection device that includes the earpiece body. The convoluted acoustic horn that is configured to receive airborne sound waves through a first, sound-receiving opening and to emit airborne sound waves through a second, sound-emitting opening, wherein the first, sound-receiving opening is larger in cross-sectional area than the second, sound-emitting opening.
来源网站:
中国工程科技知识中心
来源网址:
http://www.ckcest.cn/home/

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