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This paper is to present a systematic study on many critical factors, such as angle of the testing panel, total scanning time of the intensity probe, source room noise level, number of microphones used in the source room, sample size, distance of the microphone in the source room, intensity probe spacer size, measurement time, and receiver room size. Additionally, three noise factors; background noise level, operator and measurement distance were also included. It were discovered that test panel angles and sample sizes were the two most dominant factors. All of above are relevant to experimental SEA or SEA validation process. The complete test results and the experience gained are presented in the paper.