| Abstract: | The acoustic-energy loss was measured when the sound wave propagated through a layer of water fog. By the application of the sound attenuation theory in granular media and by means of the acoustic inverse (optimization) method, the size-distribution of the drops and the moisture content in the water fog were measured. It is demonstrated that the sizes of the water drops obey the normal distribution approximately. Comparison of the size-distribution results between data obtained by the inverse measurements and those obtained by the optic-microscopic-size methods shows good agreement with each other. The results of the moisture content and the thickness of the fog layers obtained by this method are also consistent with the results measured by other methods (for example, the water-content weight and the direct measurement of layer's thickness by a scale, etc.) reasonably. |
