本文基于运动车辆产生的声频信号来进行车型识别的研究。
Based on the acoustic signal generated by moving vehicles, this article spread a research on vehicle recognition.
本文通过视频信号与声频信号实验分析了燃气射流火焰的声发射特征。
Through the experimental analysis on the synchronous signal of audio and video of the premixed gas jet flame, the characteristic of the flame is studied.
声频定向扬声器是利用参量阵原理，产生高指向性声频信号的新一代扬声器。
Audio directional loudspeaker is a novel loudspeaker which can generate an audio signal with high directivity by utilizing the parametric array principle.
AUX与声频信号(T ')一起传送，前者不能与后者分离，且在后者重现期间该AUX是不可听见的，声音重现质量不会恶化。
Along with an audio signal (t), AUX is intended to be transmitted which cannot be separated from the audio signal, is inaudible on reproduction and does not impair sound reproduction quality.
一声频定向换能器，以定向发射超声波给接听者，其中该超声频段部分经空气自解调而还原为原音频信号。
Because the ultrasonic wave has the directivity, the audible audio frequency demodulated from the interior of the ultrasonic wave also has the directivity and forms a directional audible sound.
一声频定向换能器，以定向发射超声波给接听者，其中该超声频段部分经空气自解调而还原为原音频信号。
Because the ultrasonic wave has the directivity, the audible audio frequency demodulated from the interior of the ultrasonic wave also has the directivity and forms a directional audible sound.
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