Multiple regression estimation method for sound of circular VAV terminal units

The sound test of variable air volume (VAV) terminal units requires a set of rigorous special devices or equipment for sound testing. However, many VAV terminal unit manufacturers have not equipped such expensive and space-occupied devices or equipment. In this paper, a method is proposed to estimate the sound data (calculation formula) of circular VAV terminal units by multiple regression analysis of the sound data of existing similar products. Using this method, it is possible to generate complete sound data (formula) of a circular VAV terminal unit, and even to correct proportionally other sound data of the corresponding VAV terminal unit by simply verifying the sound data under one condition, which can save a lot of time and money in the development process of the VAV terminal unit. At the same time, the sound data (calculation formula) obtained by multiple regression can be used as a benchmark for the sound level of the VAV terminal unit.