ear defenders
noun [ plural ] mainly UK uk/ˈɪə dɪˌfen.dəz/ us/ˈɪr dɪˌfen.dɚz/ (US usually ear protectors)
（免受噪声伤害的）耳朵保护罩
a pair of pieces of thick material that cover or block the ears to protect them from being damaged by loud noise
The company wanted the workforce to wear ear defenders. 公司希望员工戴上护耳罩。