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HEARING PROTECTION DEVICE WITH CONVOLUTED ACOUSTIC HORN
专利权人:
3M Innovative Properties Company
发明人:
ELY, Jacob H.
申请号:
EP16740525
公开号:
EP3248394A4
申请日:
2016.01.14
申请国别(地区):
EP
年份:
2018
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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