回声

What may affect the accuracy of sounding with echo sounder?

答案：D什么会影响回声探测仪的精度？水的温度和密度

What may affect the accuracy of sounding with echo sounder?

Key：D 什么会影响回声探测仪的精度？水的温度和密度

It will introduce the theory, current status and hardware of echo depth sounder and GPS. Also introduce the control flow of system, how to control the system errors, program rules of software, design of monitoring interface and the application in actual measuring process and advantage.

本文详细介绍了回声测深仪和GPS的工作原理、发展现状以及本系统采用的硬件类型；还介绍了整个系统的控制流程、系统误差的控制、软件开发工具Delphi的编程规则、监控界面的设计；最后还详细介绍了系统在实际测量过程中的应用以及其优越性。

Use echo sounder frequently when passing shallow water.

通过浅水域时，要常用回声仪测深。

On her computer screen, Robyn Matteson, Mate's graduate student, monitored the echo sounder and the concentrations of krill it detected at the dome.

马特带的研究生罗宾·马特森在她的电脑屏幕上监控着回声探测器，以及在圆突区探测到的磷虾群。

Multibeam echo sounder, Sound ray tracing, GPS kinematic surveying technology, Sonar image, Data combination

多波束回声测深系统，声线跟踪， GPS 动态测量技术，声纳图像，数据融合

Based on single beam echo sounder, the MES was developed in the seventies of the twentieth century. Using the equipment, in the profile formed by samples within a ping, about more than one hundred depth datum and more than one thousand backscatter samples are observed.

20世纪70年代出现的多波束测深系统，是在单波束回声测深系统的基础上发展起来的，它能够在测量断面内，一次给出几十个甚至上百个深度点，几百个甚至上千个声强采样数据，对测量区域实施全覆盖式测量。

As an important part of a successful Acoustic Echo Cancellation, several Double-Talk detection methods are alsostudied and analyzed, including the Geigel algorithm.

最近，根据过滤器的频率作用，提出的一种方法，设置一个消除回声的重要部件。

In this dissertation, we have discussed and compared these algorithms in the environment of quickly changed echo path, time-varying noise, and double-talk We also have used actual voice data to simulate these states, and have simulated these algorithms in such states.

文中逐个比较了几种常见算法，对它们在时变回声信道、时变噪声和双讲这些声场状态变化下的性能进行分析比较，用实际语音数据模拟出类似声场状态的变化，并进行仿真。

The shape of the land - its mountains, rocks, riverbeds, and waterholes - and its unseen vibrations echo the events that brought that place into creation.

土地的形状-山川、岩石、河床、水洞以及创造事物时所产生的那种的震动的回声。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。