To remove wind noise contained in a low frequency component in an input sound.

A wind noise detector (309) detects a level L of wind noise from audio signals outputted from microphones (301 to 304). A wind noise removing unit (306) removes wind noise from the audio signals outputted from the microphones (301 to 304) in accordance with the wind noise level L. A sound field converter (307) converts the audio signals outputted from the wind noise removing unit (306) to 5.1 channel audio signals. A sound volume adjusting unit (310) adjusts a sound volume level of a low frequency channel (LF) in accordance with the wind noise level L. An automatic level controller (308) controls the levels of sound signals from the sound field converter (307) and those from the sound volume adjusting unit (310) in accordance with one of the sound signals from the sound field converter (307).

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