Thermo-acoustic behavior of a swirl stabilized diffusion flame with heterogeneous sensors

► Heterogeneous sensors used to examine the thermo-acoustic behavior of flames. ► Examined the interdependence of high temperatures on acoustic source localization. ► Acoustic sources do not occur in the regions of high temperature fluctuation. ► Fluctuating temperatures occur in regions of high temperature gradients. ► Noise generation regions in high temperature regions of a flame identified.