Freehand control device comprising: an identifying unit (11) for identifying a microphone of a plurality of microphones (5A-5C) through which a speaker inputs speech utterances; a noise characteristic adjusting unit (12) for adjusting characteristics of noise each contained in an input signal from one of the plurality of microphones to be equal at each frequency; and a switching unit (13) for switching an input signal of the microphone identified by the identifying unit among the input signals of the plurality of microphones whose noise characteristics are adjusted by the noise adjusting unit to a signal sent to a person at another end of a microphone Call to be transferred, where the noise characteristic adjusting unit sets the characteristics of the noises included in the input signals at each preset frequency width (RB) in a frequency band (BW) to be set, the frequency width is changeable, and the noise characteristic adjusting unit reduces the frequency width in a frequency band in which an amount of change in the noise floor is greater than a predetermined threshold within the frequency band to be set.
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