sound power level

Since 2004, some basic data have been gained from the systematically measurement of a number of important national instrument' sound power level in reverberation room of South China University of Technology.

华南理工大学自2004年开始在混响室内对若干重要的民族乐器的声功率级进行了系统的测试，得到了民族乐器的部分基础声学数据。

The sound power level of oil pan was estimated by the method of vibration velocity.

通过振动速度法，估算了油底壳辐射的声功率级。

the sound power level calculation of similar fans

相似风机声功率级的估算

the progress in the measurement of sound power level of noise source

噪声源声功率级测量的进展

Measuring And analysing for the sound power level of Roving Frame

粗纱机噪声声功率级的测定与分析

Sound Power Level Measurement of Ruan, a Chinese Traditional Plucked Stringed Instrument;

阮是一种具有两千多年历史的中国弹拨类乐器，起源于秦汉。

sound power level measurement for pipa-one of chinese traditional instruments

中国传统民族乐器琵琶的声功率测试

the relationship between sound power level and sound pressure level radiated by the fan in a suck pipe

吸气管道中风机辐射的声功率级与声压级的关系

Study on Vibration Measurement Method of Sound Power Level Emitted by Large and Medium Electric Machines

大中型电机声功率的振动测量法研究

Experimental Analysis of Ultrasonic Testing for Level of Material in Tubular Ball Mill of Fossil-fuel Power Plant; Research of Ball Mill ′ s Material Level Measurement System on Sound-electronic Measurement

火电厂钢球磨煤机料位超声检测的实验研究基于球磨机电声功率谱料位检测系统的研究

a study on the scanning path error for determing sound power level using sound intensity scanning

基于扫描声强法的声功率测量扫描路径误差研究

Survey and Determination of Acoustic Power Level of Railway Regular Sound Source

铁路常见固定性声源声功率级的测定

experimental research on the accuracy of sound power level radiated from a tool machine using sound field indicators

利用声场指数确定机床辐射声功率级测量精度的实验研究

determination of sound power level for noise emitted by displacement compressors& engineering method

GB/T4980-1985容积式压缩机噪声声功率级的测定&工程法

method for semi-anechoic room used for measurement of sound power level of reference sound sources

标准声源声功率级的半消声室检测法

measurement and calculation of sound pressure level and sound power level.

声压级及声功率级的测量和计算。

PC power has reached a level close to that needed for procession television and sound data streams in real time, multimedia was born.

电脑的能力达到实时处理电视和声音数据流的水平，这时多媒体就诞生了。

measurement on the sound power level for mechanical noise

机器噪声声功率级的简测方法的研究

determination of sound power level for noise emitted by woodworking machinery

GB/T3770-1983木工机床噪声声功率级的测定