Audio directional loudspeaker is a novel loudspeaker which can generate an audio signal with high directivity by utilizing the parametric array principle.
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。
A real time measuring device for ultrasonic electric signals is developed in this paper, it can measure the ultrasonic electric signals with high voltage, high frequency and non sine wave, the measurement results can be saved and analyzed in real time.
针对功率超声电信号高频高压且带有波形畸变的特点，本文研制了一种超声频电信号检测系统，可以对超声过程中功率、电压电流有效值、相位差及频率信号进行快速准确的实时检测，而且可以对测量结果进行实时记录、分析处理。
Study on the detection of noise frequency modulation signal based on spectrum estimation;
基于谱估计的噪声调频信号检测方法研究
Broadband noise frequency modulation signal with high precision is commonly used in modern electronic interference system.
宽带高精度的噪声调频信号在现代电子干扰系统中应用广泛。
High frequency noise in output pulse of Q-switched laser;
文中采用泰克高速采样示波器 TDS5000B和1 ns 响应时间的硅光电二极管对调 QDPL 的激光脉冲信号中出现的高频噪声信号进行了研究,表明其时域上的表现形式是高频毛刺信号,频域上则主要表现为1～2 GHz的噪声信号。
sound IF amplifier tube
声频信号中频放大器
HF transistorized signal generator
晶体管高频信号发声器
FM stereo signal generator
调频立体声信号产生器
A continuous signal, or sound, of one particular frequency.
一种具有特定频率的连续信号或声音。
Performance analysis of echo synchronous signal in audio watermarking
音频水印中回声同步信号的性能分析
Feature extraction of ultrasonic echo signals(RF);
超声回波射频(RF)信号的特征值提取
Medium and low frequency underwater acoustic signals detecting with laser interferometry
中低频水下声信号的激光干涉法探测
Time-Frequency Distribution of Acoustic and Vibration Signals Based on Harmonic Wavelet Transformation
噪声和振动信号的谐波小波时频表示
The video signal is directed to the CRT through a sound trap which eliminates the sound-carrier frequency.
视频信号通过声音陷波电路，消除声音载波频率，直达CRT。
Time-Frequency Analysis of Engine Vibration and Noise Signals and Research on the Blind Separation Technology for Source Signals;
内燃机振声信号时频特性分析及源信号盲分离技术研究
The Research of Array Acoustic Logging Signal Process Based on the Time-Frequency Signal Analysis
基于时频信号分析的阵列声波测井信号处理研究
A depth signal detection method based on single-frequency double-pulse underwater acoustic tracking signal system
一种同频双脉冲水声跟踪信号体制下深度信号检测方法
ratio of carrier-to-interfering signal
载频信号对干扰信号比
Spectrum Feature of Step Signal with White Noise and Method of Noise Reducing
含白噪声阶跃信号的频谱特性及去噪分析
Research of the Low-frequency Signal Detection in Passive Sonar System;
被动声纳系统中低频信号的检测技术研究
The Research on Ultrasonic Signal Processing Method Based on Time-Frequency Analysis;
基于时频分析的超声信号处理方法的研究
The Research of Beamforming Technique in Low Radiated Noise Submarine Measurement;
波束形成技术在声频弱信号测量系统中研究
Feature Extraction of Underwater Acoustic Signals Based on the Cross-components of Time-Frequency Distribution;
基于时频分布交叉项的水声信号特征提取