查询词典 voiceless sound

The ventilation and sound attenuation system are introduced to the standard building acoustic sound insulation lab to meet the requirement of sound power level measure of chair outlet′s airflow noise for China National Grand Theater.

为测量国家大剧院座椅下送风风口气流噪声声功率级，对已有的标准建筑隔声实验室的接收室进行改造，引入通风系统，同时进行消声处理。

And social stability depend on sound, a sound legal, with perfect sound but also law enforcement officers strictly enforce the law.

而社会稳定要靠完善、健全的法律，有了完善、健全的法律还要执法者严格执行。

The sound tracks of most films are made up of both synchronous sound and post synchronous sound.

多数电影的声带上均有同期和后期录制上去的声音。

Though bird sound can be in low hesitating of only the chatter that cultivate bump, although the frog early spring cries,the side that noisy lives me is roused, phlogistic now Xia Youjiang comes, cicada sound is met as brook sound more and more baronial, but the cadence of so much nature, the composition of so much numerous and complicated, they always are on any account, when short when long, strewn at random have send, make a beautiful and peaceful world.

虽则鸟声会在仅有的树颠啁啾低徊，虽然初春的蛙鸣聒噪过我的耳鼓，现在炎夏又将来临，蝉声会随着溪声越来越宏大，但是那么多自然的调子，那么些纷繁的乐曲，它们总是时高时低，时短时长，错落有致，构成一个美而宁的世界。

The article adopts sensor, ScienceWorkshop to measure velocity of sound with syntony stationary wave method. Not only the change of sound wave can be heard, but also the change of sound wave with computer can be demonstrated.

文章采用传感器和数据采集接口，利用计算机采集数据，配以专用DataStudio软件，用共振驻波法测量声波的波速，不仅可以听到声音强弱的变化，而且可通过计算机演示波形的变化。

Sound source signal and treatment: The key part of the system is a 12 channels attunement of the PV series .Cooperating with signal from the platform, DVD signal, the compere can give a speech through the UHF wireless microphone or microphone on the desk. And wireless microphone can be used when in the question and answer part.A sound feedback suppresser will be used in the system, so it can improve the sound emitting plus.

音源信号及处理部分；采用美国百威公司的PV系列的12通道调音台作系统心脏，配合来自讲台的电脑信号、DVD播放信号，主讲人采用UHF频段的手持式无线麦克风及台式麦克风发言，并设置手持无线麦克风作为提问使用，系统添置声反馈抑制器使传声增益得到最大的提高。

The independence of the function is discussed focusing on the connection between man and language by analyzing the important concept of Chinese classical poetics Feelings-expressed-by-sound , which shows the opening and harmonious connection between the inner formalized feelings of man and the outer formalized sound of poetry or between man and language. As the formalized emotion, the feelings of the sound formed don't depend on social emotion.

生成的独立性：诗歌语音结构的生成具有"物之自则"即和谐自组织的的特性，也即不是在外力作用下而是按自身内在构型规律成型的；从人与语言的关系来看，古人用"体""用"并通过对体用一如的强调，来揭示人的内在性情与诗之"声"的高度交融关系，正是在"情之自溢"、"触物成声"的生成过程中，诗歌才做到体用一如——诗歌语音和谐构型的独立性离不开人的内在情文构型的独立性。

The sound is different between normal duck eggshells and cracked duck eggshells when being knocked by stiffer materials; the sound of normal eggshells is very silvery and sonorous, while the sound of cracked eggshells is very toneless and tedious.

好壳蛋与损壳蛋在被其他物体碰撞时，蛋壳会发出不同的声音，好壳蛋蛋壳发出的声音清脆，而损壳蛋蛋壳发出的声音沙哑、沉闷。

The agglomerations sizes of fine particles in the fluidized bed are smaller under higher SPL. The sound waves have little effect on the agglomerations when it is under 120dB. But the agglomerations sizes will be dramatically reduced to 180μm from 720μm when the SPL is above 130dB. The umf has a minimum value at an appropriate frequency of sound and a good quality of fluidization can exist in a greater ranges of frequency of sound when the SPL is higher.

当频率高于120Hz，流化床中形成聚团尺寸随着频率的增加而增大，最小流化速度也随着频率的增加而增大，当频率低于120Hz，流化床中形成聚团尺寸随着频率的减小而增大，最小流化速度也随着频率的减小而增大；料层越高，声波的衰减越大，超细颗粒的流化效果越差，最小流化速度越大。

White noises like the sound of a vacuum cleaner or electric fan or other sound devices that mimic the sound of the ocean or rain can be helpful.

白噪声一样的声音，真空吸尘器或电风扇或其他声音设备，模仿的声音，海洋或雨，或许会有帮助。

The work of this paper is as follows: 1. Looking back the progressing history of the linear motor, introducing the features of the elevator driven by linear induction motor, radicating the topic of this paper "the digital frequency variable control of the elevator bi-side direct driven by linear induction motor". The research of this paper covers the conventional VVVF control, space vector based VVVF control, vector control and DTC.

本文主要开展了以下几个方面的工作： 1 回顾了直线电机发展历史，电机的驱动技术演变，特别是针对直线电机的驱动，简要介绍了直线感应电机驱动电梯的优点和不同结构类型，对传统的v／f控制，基于空间矢量法的v／f控制，矢量控制，和基于电压空间矢量的直接转矩控制进行了比较，确立了本课题的研究主题：直线感应电机双边直推式驱动电梯的全数字变频控制。

The article combines with the treatment of a superficial civil air defense work to introduce how the grouting method to improve the performance of the backfill soil.

文章从治理漂浮人防工事的角度提出了注浆技术在改善回填土性质方面的应用，并详细阐述了注浆技术的施工流程。