英文里常见的喇叭背后叫rear wall
我找了几篇文章，喇叭后墙都是front wall；不过是不是常用说法不得而知了。
https://www.gearslutz.com/board/studio-building-acoustics/931828-how-optimize-your-speaker-placement-amp-avoid-common-mistakes.html
https://www.acousticfields.com/front-wall-fanaticism/
http://realtraps.com/art_front-wall.htm
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