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- The real decibel attenuation of the hearing protector in the workplace is lower than the value measured in the laboratory, because the measuring conditions in the laboratory are more strict. 研究表明：护耳器现场使用实际声衰减值低于实验室值，其原因是护耳器的实验室测量条件较为严格。
- Hearing protectors - Testing - Part 2: acoustic test methods. 听力保护器。试验。第2部分:声学试验方法。
- Hearing protectors which connect wirelessly to mobile phones etc. 听觉保护套把无线电和移动电话等等连结起来。
- Hearing protectors - Safety requirements and testing - Part 5: active noise reduction ear-muffs. 听力保护器。安全要求和检验。第5部分:有源降噪耳机护套。
- All shooters should wear protective shooting glasses and some form of hearing protectors while shooting. 所有射手都应该佩戴射击专用的防护眼镜和某种形式的听力保护装置。
- Objective To observe the sound attenuation effect of several kinds of hearing protectors (earplugs and earmuffs) in an infrasound generator sound field. 目的观察几种护耳器(耳塞、耳罩)对次声发生器次声场的隔声效果。
- Keywords infrasound;hearing protector;earplug;earmuff;sound attenuation value; 次声;护耳器;耳塞;耳罩;声衰减值;
- He stood aghast on hearing the news. 他听到这消息吓呆了。
- One that serves as a guardian or protector. 守护人的，保护者作为守护人或保护者的人
- Where noise levels are high and the operators are wearing hearing protectors without radio communication, a system of visual communication must be provided to convey any site emergency alarms. 当噪音高，操作人员佩戴上听力保护用品而没有对讲机进行通讯时，则必须提供可视通讯系统以转达现场报警。
- Hearing those old songs takes me back a bit. 我听到那些旧歌曲就有些怀旧。
- He ran back the tape after hearing it. 他听完录音后把磁带倒回去。
- The bandits, hearing steps, took to flight. 匪徒听到脚步声就逃跑了。
- They were very grateful to their kind protector. 他们十分感激好心的保护者。
- After hearing the good news, Charles walked on air. 听到这个好消息，查尔斯喜气洋洋。
- Hearing this news, his happy to go mad. 听到这个消息，他高兴得发狂。
- She is enthral by the story she hear. 她被她听到的故事迷住了。
- A protector or champion of the people. 民权保护者人民的保护者或斗士
- We used to hear the train whistle at night. 过去我们常会在晚上听到火车的汽笛声。
- You don't have to yell; I can hear you. 你用不著喊，我听得见。
- 今日热词
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- 深远海浮式风电平台 - deep-sea floating wind power platform
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- 京雄高速公路 - Beijing-Xiongan expressway
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- 农业及相关产业增加值 - the added value of agriculture and related industries
