Howling suppression apparatus, microphone device, amplifier equipment, loudspeaker systems and howling suppression method

摘要

The present invention together with the occurrence of howling can be sufficiently suppressed, and to provide a howling suppression device which can suppress the speech head breakage phenomenon occurs. An amplitude measuring device 6 for measuring the amplitude of the audio signal input from the microphone 2, an amplitude attenuation section 9 for attenuating the amplitude of the audio signal to be output to the speaker 5 A1 A howling suppression apparatus 3, a microphone 2 and a howling determination unit determining howling 7 whether there is generated based on the audio signal input from. When it is determined that howling has occurred, and also performs noise reduction control mute level up to attenuate the amplitude of the audio signal to be output to the speaker 5, noise reduction control unit 11 of the apparatus 3, the apparatus while the mute control is performed, unmute 12 of 3, when it is determined that howling does not occur and larger than the threshold a predetermined amplitude is the amplitude of the input audio signal from the microphone 2, I want to cancel the muting control. [Selection Figure] Figure 1