Interference shielding device for acoustical sensor self-noise measurement

The present invention describes an interference shielding device for acoustic sensor self-noise measurement and belongs to the sensor measurement field. The interference shielding device is used for the self-noise measurement of an acoustic sensor. The shielding device of the invention is used for isolating and shielding a plurality of kinds of interference in an environment; and the shielding device includes a basal body platform, a metal box body, a vacuum cylinder and a vacuum-pumping system; the metal box body is arranged on the basal body platform; the vacuum cylinder is arranged inside the metal box body; a measured acoustic sensor is arranged inside the vacuum cylinder and is suspended at the lower end of the upper cover of the vacuum cylinder; the measured acoustic sensor is connected with a noise acquisition system through an electrical connector and a cable; the vacuum-pumping system is located outside the metal box body; the vacuum-pumping system is connected with the vacuum cylinder through a flex