A kind of method, a recording studio for being used to form the sound library for constructing remote voice identification in the home network is arranged to be fixed for a speech recognition database of a displacement sound between a microphone and a loudspeaker, by DSP (digital signal processor) record module being mounted on wall and ceiling, the performance serial communication with a PC includes serial port. Multiple DSP record modules and record device are mounted on the ceiling of wall and recording studio. DSP record modules replace a sound card or CTI (computer-telephony integration) plate to be used as an ADC (digital-analog convertor) in PC. The reflection characteristics in different spaces are modeled in the considerations of DSP record modules are ceiling mounted in the predetermined space of a studio environment, and a wall mount record type module is installed in a position of a home device. The position of microphone (61-68) passes through the position for considering that a variable talking position of loudspeaker is changed loudspeaker from loudspeaker without change. PC is stored in by serial port from a voice signal output of multiple DSP record modules.
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