The paper studies the effect of acoustic emission (AE) during combustion of Ni and Al powder mixtures as well as Ni and Al twisted wires. The acoustic measurements show that AE occurs at the moment of ignition of the samples and moderates after the combustion is completed. The features of AE signals are low-ordered discrete pulses with duration of (0.5÷4.5) ms and regular vibrations with a frequency of (860÷900) kHz. The possible mechanisms of generation of acoustic vibrations in propagating combustion waves are analyzed.