
Road Traffic Noise Reducing Devices - Test Method For Determining The Acoustic Performance - Part 5: Intrinsic Characteristics - In Situ Values Of Sound Reflection Under Direct Sound Field Conditions
出版:Nederlands Normalisatie Instituut

专家解读视频
Road Traffic Noise Reducing Devices - Test Method For Determining The Acoustic Performance - Part 5: Intrinsic Characteristics - In Situ Values Of Sound Reflection Under Direct Sound Field Conditions
出版:Nederlands Normalisatie Instituut
专家解读视频