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decibels

这款特殊的“口红”关键时刻能救命!

When you take off the cap, it will immediately send out an alarm of 90 decibels (dB) and also send a message to the police.

坐飞机的危害

Sounds can often range between 95 and 105 decibels, rising to 115 during take-off – which can potentially lead to hearing loss, especially if you fly a lot.

我国首列坐卧转换动车组正式下线

Sound proofing and vibration damping can reduce noise inside the carriages to 65 decibels when the trains run at maximum speed, a noise level suitable for conversation, the manager said.

美国法院查证海军所用声呐残害动物

According to experts, the sonar systems used by the navy generate sound waves that can reach 235 decibels - a loud rock band reaches around 130.

常戴耳机易失聪

Tests show that a passing-by subway train can produce a noise of 100 decibels.


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