At the International Workshop on New Approaches for Multidimensional Signal Processing 2020 on 9-10th of July we will be presenting a new approach for detection of fires based on Deep Neural Networks (DNN) and their extinguishing using an acoustic fire extinguisher. Finding fires on video stream is based on low-cost hardware platform containing Movidius stick for hardware acceleration of the DNN used for fire detection. For this purpose, the fire extinguisher uses a sinusoidal acoustic wave modulated by a triangular waveform. The special design of the extinguisher guarantees that the sound pressure level will be sufficient for successful extinguishing of the fire in distance up to 130 cm.