The error brought up by the sensitivity difference of sensors was analyzed in the transfer function measurement using two-sensor method in acoustic tube. Based on the transfer function found from the known reflectance of known interface the ration of sensors sensitivities could be measured, a new method for sensors sensitivity calibration in acoustic tube was brought forward. An experimental validation of the known transfer function was carried out in air-filled tube with rigid terminator by exchanging the microphones in the acoustic tube. In water-filled tube with air terminator the experimental validations of the new method were carried out in the condition with environment pressure and higher pressure, it illustrates the validity of the new method, which overcomes the difficulty of exchanging hydrophone in water tube.
Chung Y D,Blase A.Transfer function method of measuring in-duct acoustic propertiesI.Theory [J]..J Acoust Soc Am.1980,68(3):907-913
Chung Y D,Blase A.Transfer function method of measuring in-duct acoustic propertiesII.Experiment [J]..J Acous Soc Am.1980,68(3):914-921
Corbett S S.A two-hydrophone technique for measuring the complex reflectivity of material in water-filled tubes .AD,A138613,1983
�����.ˮ�����ܲ��������о� .����:�������պ����ѧ��Դ�붯������ѧԺ,2007 Xu Baikun.Research on measurement method in water-filled tube .Beijing: School of Jet Propulsion,Beijing University of Aeronautics and Astronautics,2007(in Chinese)
�Ź���,������,�����.��ѧ����[M].�Ͼ�:�Ͼ���ѧ������,2001:201-203 Du Gonghuan,Zhu Zhemin,Gong Xiufen.Foundation of acoustics [M].Nanjing: Nanjing University Press,2001:201-203(in Chinese)
����.ˮ�����ϵ���ѧ���Լ���ѧ�����о� .����:�������պ����ѧ��Դ�붯������ѧԺ,2006 Yan Lei.Research on acoustic measurement and acoustic property of underwater anechoic material .Beijing: School of Jet Propulsion,Beijing University of Aeronautics and Astronautics,2006(in Chinese)