查询词典 loudspeaker

After take analyzed deeply for the opened magnet circuit with FEMM (Finite Element Method Magnetics) we find out the field distributing that is separated into three sections . One is the main area what we called as positive field section. Beside the main field there are tow areas that are called the inverted field sections. Loudspeaker arise a very serious distortion when the voice coil moving into inverted field areas. The direction of induced current in the coil part of entered inverted field area is same with the current driving into loudspeaker so that total currents increas largely and heat increase rapidly. With more coils moving into inverted area the voice coil will take on negative inductance properties. It is the main reason that voice coil is burned by heating with increasing current due to arise negative inductance. So opened magnetic circuit is not suitable for the woofers in which the voice coil have wider displacement range. When using this kind magnetic circuit design, the voice coil moving range should be less than the range of positive field to avoid loudspeaker arise serious distortion and heating. Even though voice coil moving range is in the positive area, loudspeaker will still arise more distortion because the field distribution is very cliffy at tow sides of the positive area and full range of magnetic field distribution is not parallel that will arise distortion. Base on above reasons, opened magnetic circuit is not an ideal magnetic circuit for low-frequency loudspeakers. But it can be used in mid-range or high-frequency productions.

开式磁路是由2片钕铁硼磁铁和主导磁板和导磁垫片组成，我们在实践过程中发现这种磁路结构不适合于低频扬声器的使用，我们通过使用FEMM（Finite Element Method Magnetics）软件包对该磁路进行了分析，该磁路的磁场范围被分成3个区域，其中在主导磁板附近形成一个正向磁场，在正向磁场的两边存在反向的磁场，音圈在工作时有很大一部分进入了反向磁场中，在反向磁场内线圈的感应电流方向与驱动电流方向相同，使得音圈呈现出负感抗特性，由于音圈的负感抗特性引起电流的增加导致音圈发热甚至烧毁，因此在扬声器中使用开式磁路时，音圈的运动范围应控制在正向磁场范围之内，否则音圈运动到反向磁场区域时将会产生很大的失真和发热，即使在设计时已经将音圈的运动范围控制在正向磁场范围之内，由于正向磁场的2个边缘磁场强度衰减太快，同时开式磁路中磁场的分布不是平行的，而是自由发散的分布，这样肯定会导致扬声器的非线性失真，因此我们得到的结论是：开式磁路并不是一个理想的磁路，它不适合于低频扬声器的使用，但它还可以应用于中高频扬声器。

The opened magnetic circuit is composed as tow NdFeB permanent magnets and a top plate without U-yoke. After take analyzed deeply for the opened magnet circuit with FEMM (Finite Element Method Magnetics) we find out the field distributing that is separated into three sections . One is the main area what we called as positive field section. Beside the main field there are tow areas that are called the inverted field sections. Loudspeaker arise a very serious distortion when the voice coil moving into inverted field areas. The direction of induced current in the coil part of entered inverted field area is same with the current driving into loudspeaker so that total currents increas largely and heat increase rapidly. With more coils moving into inverted area the voice coil will take on negative inductance properties. It is the main reason that voice coil is burned by heating with increasing current due to arise negative inductance. So opened magnetic circuit is not suitable for the woofers in which the voice coil have wider displacement range. When using this kind magnetic circuit design, the voice coil moving range should be less than the range of positive field to avoid loudspeaker arise serious distortion and heating. Even though voice coil moving range is in the positive area, loudspeaker will still arise more distortion because the field distribution is very cliffy at tow sides of the positive area and full range of magnetic field distribution is not parallel that will arise distortion. Base on above reasons, opened magnetic circuit is not an ideal magnetic circuit for low-frequency loudspeakers. But it can be used in mid-range or high-frequency productions.

开式磁路是由2片钕铁硼磁铁和主导磁板和导磁垫片组成，我们在实践过程中发现这种磁路结构不适合于低频扬声器的使用，我们通过使用FEMM（Finite Element Method Magnetics）软件包对该磁路进行了分析，该磁路的磁场范围被分成3个区域，其中在主导磁板附近形成一个正向磁场，在正向磁场的两边存在反向的磁场，音圈在工作时有很大一部分进入了反向磁场中，在反向磁场内线圈的感应电流方向与驱动电流方向相同，使得音圈呈现出负感抗特性，由于音圈的负感抗特性引起电流的增加导致音圈发热甚至烧毁，因此在扬声器中使用开式磁路时，音圈的运动范围应控制在正向磁场范围之内，否则音圈运动到反向磁场区域时将会产生很大的失真和发热，即使在设计时已经将音圈的运动范围控制在正向磁场范围之内，由于正向磁场的2个边缘磁场强度衰减太快，同时开式磁路中磁场的分布不是平行的，而是自由发散的分布，这样肯定会导致扬声器的非线性失真，因此我们得到的结论是：开式磁路并不是一个理想的磁路，它不适合于低频扬声器的使用，但它还可以应用于中高频扬声器。

The Mimir loudspeaker is based on a standard 14 litre vented cabinet that is available assembled and finsihed at some DIY loudspeaker shops.

Mimir音箱箱体的设计等效容积为14公升，它可在一些音箱DIY专门店自行组装完成。

We are committed to the exterior design and development of domestic electrical appliances, digital products, communication products, consumer electronics, audio-visual products and products of other fields. Our products are: TV, LCD TV, cell phone, PHS, video phone, computer case, USB Flash Disk, DVD player, MP3, MP4, PMP, MP3 hard disk, mouse, keyboard, mobile hard disk, PC camera, lamp, household intelligence terminal, loudspeaker, PROTABLE BOOMBOX, weight electronic, infrared thermometer, smoke, gas alarm, Finger-electronic Lock Series, safe, hotel card lock, crock pot, pizza furnace, hardwareand home appliances, car DVD, PDA, GPS, Bluetooth headset, BULETEETH, electric drier, MP3 loudspeaker, attendance system, door lock, STB, and digital camera, etc Moreover, we have a long-term cooperation with professional mould factories model companies, hardware mould factories and printing factories.

我们致力于家电产品，数码产品，通讯产品，消费电子产品，视听产品等领域的外观设计开发工作，涉及的产品有：数码摄像头，TV，液晶电视，手机，小灵通，可视电话，电脑机箱，U盘，DVD播放机，MP3，MP4，PMP，硬盘MP3，鼠标，键盘，移动硬盘，台灯，家庭智能终端，音箱，PORTABLE BOOMBOX，电子体重称，红外线体温计，烟雾、煤气报警器，指纹锁系列，保险柜，酒店锁，慢炖锅，披萨炉，五金家电等，车载DVD，PDA，GPS，蓝牙耳机BULETEETH，电吹风， MP3音箱，考勤机，门禁，机顶盒，数码相机等。

Crossover network divide frequencies out to each specific loudspeaker component,proper phasing and precision frequency rolloff allow each loudspeaker to perform at it best.

独特的聚炳烯低音盆配抗紫外线丁基橡胶复合折环，提供持久稳定的弹性刚力，保证各种恶劣环境下音盆稳定的线性位移，赋予音盆极为优异的频率响应。

The company's new Cinema Experience line of products, featuring the Acheron loudspeaker, have been installed in the Bay Area's Skywalker Sound, ImageMovers Digital, and American Zoetrope, as well as USC School of Cinematic Arts and the Digital Cinema Auditorium at University of California, San Diego.

Meyer Sound公司的影院体验系列产品，以Acheron为特色的扬声器，已经应用到港湾区的Skywalker Sound天行者音效公司，ImageMovers Digital罗勃辛密克斯制片公司和American Zoetrope美国西洋镜电影公司，以及加利福尼亚大学圣地亚哥分校的电影艺术学院和数字化影剧院。

It makes one think of the story about the airline pilot who told his passengers over the loudspeaker,I've some good news and some bad news.

这使人想起了一个飞行员的故事，他通过喇叭告知乘客：我有一个好消息和一个坏消息。

The measuring microphone shall be placed 5cm from the loudspeaker in an anechoic chamber, on axis.

测量麦克风应该在消声室里离喇叭5迷离的地方放置着，在基准线位置。

For a start, governments could begin by loudspeaker banning all cigarette and tobacco advertising and should then conduct antismoking advertising campaigns of their own.

作为禁烟的第一步，政府首先应该禁止一切香烟及烟草广告，然后发起反对吸烟的宣传活动。

In this, and in the several other views, the line array loudspeaker may radiate over the full audible frequency range, or may radiate over a limited frequency range, typically the high audible frequencies.

在该视图和另外几个视图中，线性阵列扬声器可以辐射整个可听频率范围或可以辐射有限频率范围，通常为可听高频。

According to our present broadcasting situation,the thesis proposes using new technology to update and reform the present HFC. It also suggests broadcasting using self-advantage and arranging EPON in order to win the supermarket.

论文从我国广电的现状出发，结合实际，积极倡导采用新技术更新、改造我国现有的HFC网络；倡导广电现阶段利用自身优势，部署EPON网络来赢取市场。

A new general kinetic equation was derived in which the effect of the removal of condensation water was taken into account completely, and was applied to the polyesterification kinetic study of AA/HPHP and AA/NPG. It was found that the reaction order of self-catalyzed polyesterification was not constant. For these polyesterifications, the reaction order was 2.5 at a low temperature, while 3.0 at a high temperature.

考虑缩合水的排除对反应体系的影响，用体积浓度单位推导出一个新的聚酯反应总包动力学方程，并应用到AA/HPHP和AA/NPG两个聚酯化反应的动力学研究中，研究发现，自催化聚酯反应的反应级数并不是固定值，对于AA/HPHP和AA/NPG两个聚酯化反应而言，低温时反应级数为2.5，高温时反应级数为3.0。