可听声是指引起听觉的声波，一般简称声或声音。
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可听声声场模拟所要回答的问题是：怎样确立一个声场和怎样重建一个声场。
The problems which audible sound simulation wants to solve are how to determine a sound field and how to restructure a sound field.
换能器发出的超声信号携带输入的音频信号信息，在空气中发生非线性作用，解调为可听声。
The ultrasonic signal which is emitted from the transducer carries the input audio signal information, does the nonlinear interaction in the air and is demodulated into audible sound.
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。
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.
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