This paper concerns the measurement and prediction of rainfall noise with a particular focus on measurements made using method described in ISO standard. Rainfall is generated by rain impacting surface which excites producing noise. Here, several different models for force produced water droplet flat inclined are presented. These designed nominal intense heavy raindrops standard validated again...

introduction: the improvement of technology has increased noise levels in hospital wards to higher than international standard levels (35-45 db). higher noise levels than the maximum level result in patient’s instability and dissatisfaction. moreover, it will have serious negative effects on the staff’s health and the quality of their services. the purpose of this survey is to analyze the level...