The technology works by focusing sound into a narrow beam, just like light.
这项技术的原理是将声音压缩成类似于光的窄束。
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The glass box of mosquitoes across the room is an old 10-gallon fish tank. Each time a beam strikes a bug, the computer makes a gunshot sound to signal a direct hit.
A novel audio beam loudspeaker which based on nonlinear propagation effects of ultrasonic in the air to generate audible sound with high directivity is presented.