In allusion to the electrical echo problem in the communication system,introduces the design and implementation of 4*32 channel 64ms universal echo cancelation module based on MT9300,the module can be expanded for more channels through simple copying,now it was succeedly used in the BSC of the CDMA system,and effectively improve the quality of voice call.
针对通信系统中的电学回声问题,介绍了一款以MT9300芯片为基础的4*32通道的64m s通用回声抵消模块的设计和实现,该模块可根据实际需求经过简单的复制进行扩展以支持更多的通道,目前在CD-MA系统中的BSC中已经成功应用,有效地提升了语音通话质量。
The science that deals with the interaction or interconversion of electric and acoustic phenomena.
电声学研究电现象和声现象互相作用或转换的科学
Both the architectural acoustics and electroacoustics are used in the language articulation design.
游泳馆的语言清晰度设计是建筑声学和电声学的综合设计。
Physics studies mechanics, heat, light, sound and electricity.
物理学研究力学、热学、光学、声学和电学。
Study on the Dynamic Characteristics of Piezoelectric Vibrator of Ultrasonic Motor;
超声电机压电振子的动力学特性研究
Theory and Technology of Electrochemical Noise of the Marine Electrode
海洋电极电化学噪声原理及工艺探讨
(electronics) designating sound transmission from two sources through two channels.
（电子学）从两个声源通过两个通道传送声音。
Overall electro-acoustic frequency response for repro duction of 35mm optical sound track-Reproduction characteristics
GB/T13157-199135mm影片光学声迹的还音电声频率响应特性
The Long-Wavelength Acoustic Phonon-Electron Scattering in Single-Walled Carbon Nanotubes
单层碳纳米管中的长波声学声子对电子的散射
Interior noise evaluation and noise source identification of a fuel cell vehicle based on psychoacoustic parameters
基于心理声学参数的燃料电池轿车车内噪声评价及噪声源识别
The Influence of the Form Factor on Longitudinal Piezoelectric Acoustic Phonon Decoherence of a Double Quantum Dot Charge Qubit
形式因子对双量子点电荷量子比特压电纵声学声子退相干的影响
ultralow noise microwave cryoelectronic system
超低噪声微波低温电子学系统
Groung State of A One-Dimensional Electron Phonon System in Strong-Coupling
一维强耦合电子-光学声子系统的基态
Electrochemical Noise of Localized Corrosion of N80 Steel;
N80钢局部腐蚀的电化学噪声研究
Sonochemical Synthesis of Nanostructured Bi_2Te_3 Based Thermoelectric Compounds;
超声化学法合成纳米Bi_2Te_3基热电化合物
A Study on Artistic Expressive Force and Aesthetic Features of Film Voice;
电影人声的艺术表现力与美学特征论
Probe into Educational Electroacoustic System Experiment Teaching Innovation;
“教育电声系统”实验教学改革探索
On Introduction to English Movie in Listening Class;
谈高年级听力教学中原声电影的引入
Pitting Behavior Investigation of 304 Stainless Steel in 6%FeCl_3 Solution by Electrochemical Noise
304不锈钢点蚀行为的电化学噪声研究