The effects of the double - glazing gap to sound transmission loss , including the quality of the gas in the gap and the distance of the gap , etc . are discussed 重点讨论了双层窗中间间隙对传声损失的影响，包括其中气体性质、夹层宽度等因素。
Acoustics - measurement of sound insulation in buildings and of building elements - part 1 : requirements for laboratory test facilities with suppressed flanking transmission 声学建筑和建筑构件隔声测量第1部分：侧向传声受抑制的实验室测试设施要求
Acoustics - measurement of sound insulation in buildings and of building elements - requirements for laboratory test facilities with suppressed flanking transmission 声学.建筑物和建筑构件的隔声测量.第1部分:能抑制侧向传声的实验室试验装置的要求
This production is clearly the culmination of the visionary directors work , which used the theme of trying to defeat the gun years before once upon a time in china 男主角傅声出道后，拜洪门传人刘家良为师，苦学武艺，本片即为传声真功夫演出之一。
Points out the key issues in noise control including the arrangement of sound absorber . noise transmission from machine room and duct and noise superposition 摘要指出了全空气空调系统噪声控制应注意的几个问题，如消声器设置、空调机房及风管传声、噪声叠加等。
The sound transmission loss versus the frequency is calculated by using the professional fem software ansys and the vibration - acoustics software sysnoise 同时，在专门的有限元分析软件ansys和专业的声学分析软件sysnoise上利用该模型求解了传声损失与频率的响应关系。
The simulation method is proved to be correct and calculation of acoustic performance of muffler by ansys fe analysis software is also proved to be practical and expedient 本文的研究内容，概括了消声器理论、有限元理论与计算、 ansys软件应用、双传声随机激励技术等。
Acoustics - laboratory measurement of the flanking transmission of airborne and impact sound between adjoining rooms - application to light elements when the junction has a small influence 声学.邻接房间之间空气和碰撞噪音侧向传声的实验室测量.当连接有小影响时轻元素的应用
Acoustics - laboratory measurement of the flanking transmission of airborne and impact sound between adjoining rooms - application to light elements when the junction has a substantial influence 声学.邻接房间之间空气和碰撞噪音侧向传声的实验室测量.当连接有实质性影响时轻元素的应用
Scheme ii . a scheme based on acoustic system recongniton and adaptive filter . compared with the traditional adaptive feedback suppressor , this system has been added a new component , the residual echo suppressor component 与传统的自适应的方法比较,增加了系统识别和驻波抑制的相关模块,一定程度的提高了传声增益。
