Sound calibrator with protection function

The utility model relates to the technical field of sound calibrators. The utility model discloses a sound calibrator with a protection function. Acoustic calibrator comprising an acoustic calibratorbody, a rectangular concave hole I is formed in each of the upper surface and the lower surface of the sound calibrator body; a rectangular concave hole I is formed in each of the left and right surfaces of the inner wall of each of the four rectangular concave holes I; the side surface of the sound calibrator body is sleeved with a cylinder. A circular concave hole I is formed in the front surface of the cylinder; the utility model discloses a sound calibrator with a protection function. The upper surface and the lower surface of a sound calibrator body are respectively provided with a firstrectangular concave hole; a rectangular concave hole I is formed in each of the left and right surfaces of the inner wall of each of the four rectangular concave holes I; the side surface of the soundcalibrator body is sleeved