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.

蚊子被装在一个十加仑的鱼缸，并被放在屋子的另一边，每次一束激光杀死了一个蚊子，计算机就会发出枪声提示一次命中。

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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.

提出了一种利用空气中超声波非线性传播效应制作的、可产生高指向性可听声的新型声束扬声器。

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This first wireless telephone transmitted sound on a beam of light instead of electrical wires.

这是第一支无线电话，透过光波传递声音，而不再使用电缆。

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California-based HPV Technologies recently demonstrated a "magnetic acoustic device" or MAD that can broadcast a targeted beam of sound for a more than mile.

NPR: Focused Sound 'Laser' for Crowd Control

It invented a sophisticated device that emits sound waves in a lethally focused beam of energy but never proved that ultrasound provides long-term relief or is more effective than existing procedures.

FORBES: Not Hot Enough

All businesses could benefit from this level of laser beam focus to write their own success story HB Surround Sound will be crushing the soundtrack.

FORBES: Band Blows-Up With Business Approach