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.

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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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

Just press and hold a button on the remote control and the My Beam function will instantly "beam" the sound in your direction -- useful for the hard-of-hearing or late-night movie fests while the rest of the household slumbers.

ENGADGET: Yamaha's YSP-900 Digital Sound Projector: a 5.1 sound bouncer that works

My Beam mode focuses the sound at a specific listening position, so the listener can hear all program audio clearly, including dialog, without disturbing others in the room.

ENGADGET: Yamaha intros YSP-3050 Digital Sound Projector