《科技爱好者周刊(第141期)》:悉尼科技大学的研究人员根据降噪耳机的原理,开发出了降噪头枕,装在椅子上,不用戴耳机,只要把头靠在上面,就会听不到噪音。这个头枕内部,装了多个扬声器,会对着乘客的耳道发出抵消噪音的声波。根据测试,可以降低噪音10分贝~20分贝。http://www.ruanyifeng.com/blog/2021/01/weekly-issue-141.html
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