| 1. | Sound system equipment - headphones and earphones associated with portable audio equipment - maximum sound pressure level measurement methodology and limit considerations - general method for " one package equipment
音响系统设备.与便携声学设备相连的耳机和头戴送受话器.最大声压水平测量方法学和限制.成套设备通用方法 |
| 2. | Sound system equipment - headphones and earphones associated with portable audio equipment - maximum sound pressure level measurement methodology and limit considerations - part 1 : general method for " one package equipment "
音响系统设备.与便携式音响设备相关的耳机和头戴式耳机.最大声压级测量方法和限制考虑.第1部分: "单一包装设备"的一般方法 |
| 3. | Sound system equipment - headphones and earphones associated with portable audio equipment - maximum sound pressure level measurement methodology and limit considerations - matching of sets with headphones if either or both are offered separately
音响系统设备.与便携音频设备相应的耳机和头戴式耳机.最大声压级测量方法和限值考虑.单独提供或同时提供时头戴式耳机设置的匹配 |
| 4. | In a quasi - static heating and cooling process , the resonant conditions , levitation force and threshold pressures pm ( the minimum entrapping pressure ) and pm ( the maximum pressure to keep the integration of a liquid drop ) are changed significantly
在准静态加热和冷却过程中，谐振条件、悬浮力以及声压闲值p 。 (最小俘获声压)和pm (保持液滴不雾化的最大声压)随温度变化发生很大的变化。 |
| 5. | Sound system equipment : headphones and earphones associated with portable audio equipment - maximum sound pressure level measurement methodology and limit considerations - part 2 : matching of sets with headphones if either or both are offered separately
音响系统设备:便携式音频设备用头戴式受话器和耳机.最大声压级测量方法和限值考虑.第2部分:单独使用一个或同时使用两个时头戴式受话器设置的匹配 |
| 6. | In this paper the train running noise level has been predicted with the theory of point sound source . the sound exposure level of a train set pass , equivalent continuous sound level and maximum sound level of a train set pass has been taken as estimate values , and some kinds of affixation attenuation on the course of noise propagation is considered , then the corresponding visual software has been developed . these make it convenient and precise to predict the noise level
本文从点声源的理论出发，对列车运行噪声进行预测计算，采用一列车通过时的单发暴露声级、时间特性的最大声压级和一定时间内的等效声级等作为噪声评价量，并考虑了噪声传播过程中的各种附加衰减，编制了相应的可视化软件，使噪声预测计算方便、准确。 |
