This paper describes sonic communication using an electrostatic driver. It can send and receive audible and inaudible sounds. This device is intended to communicate between humans and robots, or between robots, using sound waves. To verify this device, we transmitted and received sound waves using two identical devices. The frequencies are 1kHz and 25kHz. as a result of this experiment, it was confirmed that sound wave communication in the audible range and non-audible range was possible between devices.