A single critically damped acoustic stack yields a wide frequency range as an acoustic transmitter or as an acoustic transducer having particular use in well integrity determination. The multilayer structure of the screwdriver prevents the impact force from being transmitted to the user’s hand and causing discomfort, and can relieve the discomfort caused by the impact force applied to the screwdriver while reducing the impact force loss during impact operation. In this way, a node synchronizes signal transmission and signal reception. Evaluation of the moving image quality of the screen is carried out by using the normalized N BEW.