Trial Production of new type rain gauge by using the correlation between raindrop and rain sound

Abstract

We produced a new type rain gauge for trial, which can measure the rainfall intensity with fine time resolution by analysing the sound of rainfall emitted from a tinplate can. Digital high pass filter was designed and inserted into the data processing in order to eliminate the noise. Experimental visualization of rain drop was carried out indoors and outdoors to relate the volume of rain drop to the intensity of rain sound. The time series of rainfall intensity agreed very well with data of normal raingauge with a water collector.