Acoustic fields interacting witha rectilinear droplet stream flame can increase mixing between fuel and oxidizer. Fora droplet stream burning in roomtemperature air, sufficiently high acoustic intensity levels can cause local flame extinction. The sound pressure levels required to extinguish the flame increase with increasing sound frequency, The key parameter associated withflame quench is the gas displacement produced by the sound field. Quenching occurs when the acoustic displacement distance is approximately the radius of the droplets fueling the droplet stream flame.