Experimental Study on the Airborne Noise of Rain. (1st March 2023)

• Record Type: Journal Article
• Authors: Li, Zekun; Liu, Hengqi
• Is Part Of: Journal of physics. Volume 2458(2023)
• Publication Date: 2023-03-01
• Subjects: Physics -- Congresses; 530.5
• DOI: 10.1088/1742-6596/2458/1/012014
• Languages: English
• ISSNs: 1742-6588

Abstract

Abstract: Rainfall noise is investigated experimentally in this paper. The modern high-speed camera and microphone are employed to study both drop dynamics and sound signals. Sound signals produced by single-drop impacts on deep pools, thin liquid films, steel plates, and sandy surfaces were analyzed through a combination of videos and audio. Classical Fourier transforms are performed for converting the original signal to a power spectrum. Results show that in the deep-water cases, the noise is proved to be the entrapment of a tiny breathing bubble that sheds from the dimple. The dominant frequencies of droplets impacting water film, rigid walls, and sandy surfaces are much compared with deep pool cases.