Infinity-symbol-shaped directional verifier of microphone

The utility model relates to an infinity-symbol-shaped directional verifier of a microphone. In the utility model, two acoustic tubes form a structure having an included angle of 60 degrees. The effective distance of far ports of the two acoustic tubes is a half of the wavelength of a tested sound wave. The acoustic tubes are connected on the microphone through a microphone casing tube and a sealing gasket. A sealing ring is arranged between the microphone and the microphone casing tube. The infinity-symbol-shaped directional verifier of the microphone in the utility model solves the existing problems that a traditional microphone cannot meet the infinity-symbol-shaped direction requirement and the measuring as well as the adjusting of related parameters of a model can not be made in the prior art. In the utility model, the wave interference and superposition principle is utilized to lead an incoming sound wave from the two far ports of the acoustic tubes to a sound receiving surface of the tested microphone