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Patent u feedback inhibition algorithm to eliminate automatic feedback respond u with u as many as 12 dB additional gain of acoustic environment, effectively prevent feedback u balance line or mic input, provide a phantom power supply Spot rhythm learning feedback suppressor using powerful signal processing technology and designed the algorithm to suppress acoustic feedback. It USES echo cancellation and reflection elimination algorithm to effectively filter out the annoying reflection sound in the room. By adding noise shielding noise (hear) to the output signal, or the output signal frequency changes 5 Hz, spot her feedback suppressor can detect the signal reflected in the composition, and in acoustic feedback prior to its removal, while maintaining the initial signal is in good condition. The basic function adaptive filter can be switched between "fast" mode and "accurate" mode. Fast mode is used in situations where the microphone position changes frequently, such as in a conference system with multiple microphones and switching between them. The precise mode is suitable for fixed microphone positions, for example, in a stable acoustic environment. Adaptive filter can converge at a slower speed, which can effectively inhibit more reflective components. Up to 12dB of additional benefit can be obtained before acoustic feedback occurs, depending on the acoustic environment and the selected operating mode. Belle feedback suppressor also has an automatic mixer built in for two microphone inputs. In many cases, such as in the podium, forum or conference table, two microphone can be used to better capture the movement of the speaker's voice, which often add the risk of acoustic feedback. In view of this problem, spot her feedback suppressor in the dynamic mixer will automatically reduce the weak signal input of the gain of the receiver, with increasing the input signal strong when another microphone gain. In this way, it can track moving speakers to produce optimal sound clarity. At the same time, because the total gain is constant, the maximum benefit of no acoustic feedback is maintained. Automatic mixer function works even when the feedback suppressor is disabled. Certificate with immunity recognition security in accordance with EN 60065 standard EN 55103-2 standard radiation in accordance with EN 55103-1 certification European CE standard area LBB1968 conformance statement installation/configuration / 00 number back view attachment component 1 00 LBB1968 / cav feedback suppressor