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现在人们期待着在紧急避难时(特别是在建筑内的浓烟或黑暗中),能指导人们迅速地就近找到出口或避难场所的引导装置。那么,这种新研发的方向性音响装置正是适应了这一需要。这种装置和以往的由铃声、喇叭等同时发声的警报装置不同,具有发音短、波段宽的特点。人是靠声音来把握音
It is now expected that during emergency evacuation, especially in smoke or darkness in buildings, people will be guided to quickly find guides for exit or shelter. Well, this newly developed directional audio device is adapted to this need. This device and the previous by the ringtones, speakers and other simultaneous sounding device is different, with short pronunciation, wide band characteristics. People rely on the sound to grasp the sound