Sound is a physical phenomenon where the tremors of the air are perceived by stimulating the human auditory organs. Sound is a wave motion, and the direction of tremor is the same as the direction of wave motion. These sounds are invisible to our eyes, but air molecules transmit and propagate and have kinetic energy due to the vibrations of air molecules. In general, fire evolving methods use a method to remove one or more of the three elements of temperature, oxygen, and burning material. For example, inert gas, gas, or a large amount of water is used to block oxygen or lower the temperature. However, there is a big disadvantage to this method: the things or devices around the fire are destroyed by fire suppression equipment and materials. That is, furniture, electronic products, clothes, etc., which are not directly exposed to fire, is damaged. Particularly in the case of electric fire, the surrounding electronic products are particularly susceptible to damage. In a study by the US Department of Defense in 2012, we found that the fire was turned off between speakers making a loudness of 140 dB, and we conducted a study to suppress oil fires using sound through previous research. Furthermore, in previous studies, we have developed a sound wind fire extinguisher. In this paper, we introduce a method to improve the efficiency of sound extinguisher through waveform analysis and waveform enhancement. In the proposed method, the waveform generated by the sound extinguisher is generated and amplified to a pure sine wave, minimizing the energy loss of the sound wave. And this method not only improves the efficiency of the sound fire extinguisher, but also minimizes the influence of noise, which is one of the disadvantages of the sound fire extinguisher.