RAGONETTI, PETER T.,MADRAMOTOO, RON ANDRE,ACETI, JOHN G.,STAAB, WAYNE J.
申请号：
CA3000672
公开号：
CA3000672A1
申请日:
2016.09.30
申请国别(地区):
CA
年份:
2017
代理人:
摘要：
The present disclosure describes a cost-effective earplug device that delivers minimally distorted sound, offers sound protection, can fit most users, and can protect human hearing from dangerously-high acoustic levels without the cost or inconvenience of a custom earplug.
