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1 acoustic barrier
nACOUST barrera acústica f, pantalla acústica f -
2 acoustic
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NuvoSonic — It has swimmer detection, underwater hailing by voice, and non lethal deterrent. It uses a sonar system called Parametric Port Security Sonar System (P2S3), which uses a narrow beam sound technology called Parametric Array Sonic Echo Ranging… … Wikipedia
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Mobile phone radiation and health — A man speaking on a mobile telephone The effect of mobile phone radiation on human health is the subject of recent interest and study, as a result of the enormous increase in mobile phone usage throughout the world (as of June 2009 … Wikipedia