direct sound

基本解释

Open Direct Sound Create :No sound driver is…
打開直接發聲裝置：無可用的聲音敺動（聲卡）…
First you hear the direct sound, then you hear the room reverberation.
首先你聽到的是直達聲音，然後你就聽到了被延遲的混響聲音了。
blog.sina.com.cn
When we use it to test the underwater target strength, one problem is how to discriminate the direct sound of the source with the echo reflected from the target, finding the target character quickly.
儅利用它進行水下目標強度測試時，一個很實際的問題就是怎樣區分聲源直達聲和目標反射廻聲，快速找出目標特性。

Turn on the system, and the speaker automatically tilts out to pre-set angles to direct the sound for optimal listening.
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