声压法和声强法测量建筑构件空气声隔声的比较

声强技术不仅可应用在声源声功率测量和噪声源识别,还可用于建筑和建筑构件隔声测量。首先介绍了测量空气声隔声量的声强法,然后结合我国绿色建筑标准中的声环境评价,指出建筑及建筑构件隔声的声强法测量技术在绿色建筑评价中的应用前景，并讨论了测量方法的精密度估计。本文着重介绍在实验室内分别应用声压法和声强法对四组构件的空气声隔声量的测量工作。实验结果显示,声强法与声压法测得的隔声量在整个测量频率范围内基本一致,但在低频段个别频率上存在一定偏差，对实验结果进行了精密度估计和偏差原因分析。

Measurement of Airborne Sound Insulation: Comparison of Sound Pressure method with Sound Intensity Method

The sound intensity not only can be applied to the measurement of sound power and of noise source identification but sound insulation in buildings and of building elements. The progress of measurement of sound insulation using sound intensity in buildings and of building elements is introduced, and then the prospect of the sound intensity method is pointed out combination with the national standard for evaluating green building，and the estimated precision has been discussed. The Airborne sound insulations of four specimens are measured using both methods in the laboratory. The experiments show that the two methods have the same result in the whole frequency range basically, but deviation in the specific low frequency band. The estimated precision and the cause of the deviation are analyzed.