扬声器

Meanwhile, this paper analyzed and compared the frequency spectrum andintensity radiated of the 1/3 octave band of the tire tread patterns' noise whichwas measured from different direction in the laboratory, and find out that tirepatterns noise is similar to the sound of loudhailer and has strong directivity.

同时，本文还对在室内不同方位所测得的轮胎花纹噪声1／3倍频程的频谱图与直方图进行了分析、比较后发现轮胎花纹噪声的发声类似扬声器发声，有极强的指向性，一点测试会导致轮胎方案排队择优上的困难，为此，提出了一种全方位测定声级的方法，拟定了测试规范，实验证明行之有效。

The central issue that user of of all kinds this month multimedia buys a guideline gathers at all sorts of upgrade high qualitily set, they included fourfold fast CD driver, card of a sound reachs a loudhailer.

本月各类多媒体用户购买指南的焦点都聚集于各种高品质的升级套件，它们都包括了一台四倍速的光盘驱动器，一个声音卡及一个扬声器。

He is in the earliest ECM (halt extremely microphone of system electric capacity) the industry cuts a figure, later loudhailer of miniature of sortie mobile phone / receiver domain, the company has extremely high market to have in two domains rate.

他最早在ECM行业崭露头角，后来涉足手机微型扬声器/受话器领域，公司在两个领域都有极高的市场占有率。

On the 30th Olympic Games, loudhailer transmits sound: 100 meters of final are about to undertake the man, the first is the player Bi Yuntao that comes from China , the 2nd is to come from player Jibasai of Spain to enter than in, the 3rd is well of company of the island like the player that comes from Japan child, the 4th is the player gold gun that comes from Korea, the 5th is Japanese player GT red, the 6th is to come from the player cloth Luo Bushu of Russia to take this base, the 7th is the player that comes from Mongolia cling to work suddenly, finally is the player Ruan no use that comes from Vietnam together.

在第30届奥运会上，扬声器传来声音：男子一百米决赛即将进行，第一道是来自中国的选手毕运涛，第二道是来自西班牙的选手基巴塞进比里，第三道是来自日本的选手般岛社井子，第四道是来自韩国的选手金枪正，第五道是日本选手GT正红，第六道是来自俄罗斯的选手布罗布舒服斯基，第七道是来自蒙古的选手巴了猛干，最后一道是来自越南的选手阮无用。

And, this platform has rich function, include to slide type shows, file browser, found, duplicate, mobile, delete, time-out, forward reach backward, contain inside buy stereo loudhailer, earphone and circuit output and system of file of a FAT 16/32, in addition, it still contains to be able to charge batteries of 2400mAh lithium ion, this batteries is had inside buy charges reach metric circuit, can charge through USB interface.

而且，该平台领有丰硕性能，包括滑动式显示、文件浏览器、建立、复制、挪动、删除、暂停、向前及向后，并带有内置平面声扬声器、耳机和线路输出及一个FAT 16/32文件系统，此外，它还带有一个可充电2400mAh锂离子电池，该电池存在内置充电及计量电路，可经由过程USB接口充电。

The 5mV of the audio signal which comes from the microphone to linear amplificated by the audio signals amplifier,then mixes with music signals from other sound sources(eg:the tape 、CD) by the hybird amplifier . By the control of the digital volume controller the mixed signal ,then amplificated again by the preamplifier,when integrated power amplifier for idling time realizes the signal enlargement factor respectively is 10、100、1000 times;moreover is capable of delivering 3V of output to a 600%26Omega; load. the amplificate signal makes the loudhailer work at last.

该音频信号放大器能够将来自话筒5mV的音频信号进行线性放大，然后和来自其他音源的音乐信号通过混合放大器来混合，混合后的信号经数字音量控制器对高低频的增益进行提升与衰减，再通过前置放大器放大，当集成功率放大器为空载的时候实现信号的放大倍数分别为10、100、1000倍；另外再实现当负载为600%26Omega；的时候，输出幅度为3V，最后经扬声器发出悦耳的声音。

Musical shoe sole contains respectively printed circuit board, batteries volume adjuster and small-sized loudhailer, in shoe all around bend cant still is installing 4 key board switch, ordinal the key that steps on next shoes, can give out ""," come "," rice "," law " noise of enharmonic accord with, children puts on it, when stepping on next key board switch by dance music score, can enjoy the performance of festively singing and dancing.

音乐鞋鞋底分别装有印刷电路板、电池音量调节器与小型扬声器，在鞋子四面倾斜面还安装着四个琴键开关，依次踩下鞋的琴键，便可发出&都&、&来&、&米&、&法&等音符声响，儿童穿上它，按舞曲乐谱踩下琴键开关时，便可欣赏到载歌载舞的表演。

Each loudspeaker produces clear, natural sound for excellent intelligibility of both speech and music.

每款扬声器均可以产生清晰、自然的声音，从而实现超凡的语音和音乐清晰度。

In series/parallel mode, you can wire 4 woofers to a single amp, for example, and still maintain a compatible impedance.

在series/parallel 方式下，您能架线4 台低音扬声器对一安培，例如，和仍然维护兼容阻抗。

GTi competition speaker systems include the lowest-distortion woofers we've ever built.

协泰竞争扬声器系统包括最低的失真woofers我们有史以来建造。

Cynanchum Lingtai apricot production in the average weight 65 grams, the brightly-colored fruit, juicy rich, sweet-sour taste, sweet from the nucleolus, when the late Qing Dynasty famous Shaanxi, Gansu provinces, the Qing imperial court Tongzhi tribute for years.

灵台生产的牛心杏平均单果重65克，果实色泽鲜艳，汁多味浓，甜酸适口，离核仁甜，清末时就驰名陕、甘两省，清同治年间曾为朝廷贡品。

Chenopodium album,Solanum nigrum, and Amaranthus retroflexus were very susceptible to the herbicides. Polygonum persicaria and Abutilon theophrasti were relatively less susceptible to the herbicides, and Lycopersicon esculentum was not susceptible to it. The relationship between reduction rates of weed biomass and PPM values of weed leaves 2,4, and 6 days after treatment was established.

供试的6种杂草对该混剂的敏感性存在显著差异：红心藜Chenopodium album、龙葵Solanum nigrum和反枝苋Amaranthus retroflexus对该混剂最敏感，ED90值分别为47.65、71.67和29.17g/hm2；春蓼Polygonum persicaria和苘麻Abutilon theophrasti敏感，ED90值分别为96.91、114.20g/hm2；而番茄不敏感。