1.
Design and Implementation of Directional Speaker Based on DSP Chip;
基于DSP的指向性声源的设计与实现
2.
directional frequency characteristic of microphone
传声器指向性频率特
3.
directional frequency response of microphone
传声器指向性频率响应
4.
The higher the acoustic frequency is, the stronger its directivity is.
而且所有声频均有指向性,声频愈高,指向性愈强。
5.
(1) "Noise emission" means emission of noise from the source to the living environment of the neighbourhood.
（一）“噪声排放”是指噪声源向周围生活环境辐射噪声。
6.
Design and sound field computation of an array with intense directivity
一种强指向性基阵的设计及声场计算
7.
Research on Directivity of Ultrasonic Emitter for Parametric Array Loudspeaker System
参量阵扬声器系统的超声发射阵指向性研究
8.
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。
9.
Research on Software of Sonar Array Direction Analysis and Distance Dynamic Forecast;
声纳指向性分析与作用距离动态预报软件
10.
Research of Sharpening Directivity of Piezoelectric Ultrasonic Transducer Array;
对于提高压电超声换能器阵指向性的研究
11.
Calculation of the acoustic field directivity pattern of flexural vibrating single stepped concentric plate
单台阶同心圆盘辐射声场的指向性计算
12.
Design of Microphone Directivity Measurement System Based on Virtual Instrument
基于虚拟仪器的传声器指向性测量系统
13.
Design of Array Model with Intense Directivity and Sound Field Simulation
一种强指向性基阵模型的设计及声场仿真
14.
Comparison Between Two Kinds of Directional Microphone With Parabolic Configurations
两种抛物面形状的指向性传声器的比较
15.
A device that produces a visible display of the mechanical properties of a sounding body, especially of musical instruments.
检弦器，验声器一种产生声源的机械性质的可见显示设备，尤指乐器
16.
Theoretical and Numerical Analysis for Acoustic Multipole Logging in Anisotropic Medium;
各向异性地层多极源声测井理论与数值研究
17.
On the basis of analysing composition and testing results of noise generated by high speed punch press, the major noise sourse and the noise characteristics are pointed out.
在对高速冲床的噪声组成及其测试结果分析的基础上，指出了主要噪声源及噪声特性。
18.
The Influence of Dimensional Parameters of Linear Phased Array Transducer on Beam Directivity
超声相控线阵探头线列参数对波束指向性的影响