1.College of Electrical and Information Engineering, Hunan University, Changsha, Hunan 410082, China
2.College of Engineering and Design, Hunan Normal University, Changsha, Hunan 410081, China
3. Hunan Shengyi Measurement and Control Technology Co., Ltd, Hengyang, Hunan 421000, China
Abstract：The inverse square law for calculating the sound pressure level was proposed in JJF 1147-2006 “Calibration Specification for Acoustic Performance of Anechoic Rooms and Hemi-anechoic Rooms”, causing a large deviation of sound pressure level near the sound source. For this problem, a new method of adding the air absorption attenuation factor and selecting the actual sound pressure level at the measurement position of 1 m to calculate the sound pressure level of the anechoic chamber is proposed. Through comparative experiments, the above situation can be well improved and the calibration accuracy can get increased.
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2020, Vol. 41 
