direct sound

基本解释

Open Direct Sound Create :No sound driver is…
打开直接发声装置：无可用的声音驱动（声卡）…
First you hear the direct sound, then you hear the room reverberation.
首先你听到的是直达声音，然后你就听到了被延迟的混响声音了。
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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.
当利用它进行水下目标强度测试时，一个很实际的问题就是怎样区分声源直达声和目标反射回声，快速找出目标特性。

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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