PURPOSE: To obtain a wind noise suppressing circuit capable of applying proper level suppressing processing to a wind noise and attaining sound collection with always high sound quality in a sound collecting device.

CONSTITUTION: The wind noise suppressing circuit is provided with a fuzzy rule storing part 62 storing plural fuzzy control rules and a fuzzy inference processing part 61 for executing fuzzy inference. The level AH of a high frequency component and the level AL of a low frequency component are regulated as the variabls of the antecedent part of a control rule and the evaluation level W of wind noise is regulated as the variable of its consequent part. The evaluation level W determined by the processing part 61 is supplied to an attenuator 7 and attenuation processing corresponding to the level W is applied to the low frequency component outputted from a microphone.