为什么我们有两只耳朵?

我们的两只耳朵就像是收X讯站,将接受到的声音讯息传送至大脑,左耳传至左脑,右耳传至右脑。
当耳朵接收到声音后,大脑可计算出角度,得知声音是从哪裡传过来的。大脑可分辨出邻近声源的耳朵比对侧耳朵几微秒接收到的时间差异。当只有一只耳朵聆听时,声源的分辨就无法达成。更重要的是,两耳同时聆听声音的音质会较佳,只透过单耳接收语音时,声音听起来会比较平坦以及缺乏丰富的声音内容。大多数来说,两耳都有听力损失时,好同时配戴两只助听器。

美国听力学会建议:

双耳佩戴助听器;众所周知,音乐和言语的立体声效果更佳。双耳听力受损的话,双耳佩戴助听器会       产生立体声的效果。如果您的双耳听力受损,建议双耳选配助听器。相比单耳佩戴,双耳佩戴有以下好 处;

对声音准确定位

单耳佩戴者听到背后汽车的声音,确不能判断汽车是从哪一侧开过来,这是件危险的事情;而双耳佩         戴就不会出现这样的情况。

保护剩余听力

仅仅单耳机佩戴,会过度依赖佩戴助听器的一侧耳;对侧耳长期得不到锻炼,残余听力会逐步丧失,        这就是医学中的“听觉剥削”现象。

更容易听清言语的内容

双耳佩戴可以消除“头影效应”,减少头部对高频声音的阻碍,更容易听清和粪便言语的内容。

聆听过程更轻松不费力

单耳佩戴者听小的声音比较费力,耳双耳累加则可以提高声音的总体响度,听小声也不费力。

在噪音环境里更容易听清

双耳聆听会产生立体声效果,您听到的言语声更自然,音乐声更美妙。

 

 

1,399人评论了“双耳聆听的优势”

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