DS/EN ISO 15186-3:2010 声学 使用声强测量建筑物和建筑构件的隔音 第3部分：低频实验室测量
Acoustics - Measurement of sound insulation in buildings and of building elements using sound intensity - Part 3: Laboratory measurements at low frequencies
This part of ISO 15186 specifies a sound intensity method to determine the sound reduction index and the elementnormalized level difference of building elements at low frequencies. This method has significantly better reproducibility in a typical test facility than those of ISO 140-3, ISO 140-10 and ISO 15186-1. The results are more independent of the room dimensions of the laboratory and closer to values that would be measured between rooms of volume greater than . This part of ISO 15186 is applicable in the frequency range to but is mainly intended for the frequency range to .NOTE For elements faced with thick, porous absorbers, the recommended frequency