Kodas esteemed products include home theatre speakers , mini home theatre hi - fi system , home theatre amplifiers , active subwoofers , pa speakers , and pa amplifiers Koda的产品种类包括家庭影院音箱系列迷你家庭影院音箱系列家庭影院功放机扩音器低音扩声器专业舞台音箱及功放机扩音器。
The proposed modification involves reducing the heights of the ventilation shaft , changing the direction of the discharge from sideways to upward , and installation of silencers for ventilation shafts n1 and s1 建议进行的改善工程，包括降低通风井的高度、把侧向的排气口改向上，以及为通风井n1及s1加装灭声器。
Abstract : in this paper , we have had finite - calculation to dynamic structure according to the muffler drawings and the relation parameters . as we have received a disc impedance muffler model set at the entrance of lga fan by using the optimum design way before the muffler is made so that we can learn preliminary dynamic behavior . it has supplied effective ways 文摘:针对由最优化设计方法获得的lga风机进口安装的圆盘式阻性消声器模型，在未对消声器实物加工之前，根据消声器的图纸及有关数据进行了有限元动力计算，从而初步了解消声器的动态特性.为设计优良的消声器提供新的有效途径
Test technique of acoustic excitation presented in this paper can discriminate if the adhesive structure is intensional enough to endure certainty draw strength , through a series of process , for example bringing draw strength to bear on adhesive structure . testing signal through microphone array , choosing signal ' s character , recognizing automatically through manual nerve network , and so on 本文介绍的粘接构件声激励检测方法，通过对粘结结构施加微力、阵列传声器检测信号、信号的特征提取、人工神经网络的分类识别等一系列过程，完成了粘接结构承受拉脱力合格与否的无损预报。
Jhs series power ampilifier is a new generation equipment of teaching power amplifier , which can restrains howl and can increase plus by 6 - 10db . the distance of picking up sound can be increased to 3 - 6 meters . if only you install three or four pcs of interface mike , the scope of picking up sound can cover with all over the platform without any equipment and you can prelect Jhs教学型数字移频扩声器是新一代教学扩声设备，它能够有效的抑制扩声啸叫，提高传声增益6 - 10db ，话筒的拾音距离提高到3 - 6米，只需在教室安装3 - 4支界面话筒，拾音范围就能覆盖整个讲台，无需携带任何设备，即可进行讲课,使演讲者彻底摆脱话筒的束缚，扩大了演讲者的活动范围
The porous diffusion type silencer is widely used to reduce the air flow noise because of its small volume and high noise attenuating ability . the out case of the silencer plays a very important role in reducing noise . the effect of the hole ' s shape , diameter and the distance between neighboring holes as well as the matchup between the case and the sound absorbing material tube are investigated experimentally . the relation between the out - flow noise and the gas velocity distribution is carefully studied for two different kinds of matchup between the case and the sound absorbing material tube . some useful results are gotten , which may be valuable to the design of the silencer 多孔扩散型消声器由于其体积小、消声性能高而广泛应用到排气噪声的降低上，其外壳对消声器的消声性能具有重要作用.本文对此类消声器外壳的孔型、孔径和孔距以及外壳同消声材料的配合方面进行了细致的实验研究，特别对外壳与消声材料的配合与其排放噪声以及外部流场之间的关系进行了探讨，得到了一些有用的结论，对消声器性能的提高具有一定指导意义。
