FLETCHER, DOUGLAS D.,HEMBERG, OSCAR M.,HEMBERG, ERIC O.
申请号：
CA2975708
公开号：
CA2975708A1
申请日:
2016.01.27
申请国别(地区):
CA
年份:
2016
代理人:
摘要：
A hearing protection device is provided. The hearing protection device can include a speaker to relay sounds, such as conversations, to the user of the hearing protection. The hearing protection device can be powered by a rechargeable battery pack or separately by standard batteries.
