| 摘要 |
A sound masking method for preventing tapping of the conversation and an apparatus for the same are provided to perform the masking and recording of one's own voice by the transformation multiple mixing noise. A microphone(110) converts the voice of a user inputted to a separate device into an analog audio signal. An ADC(Analog to Digital Converter)(120) performs the sampling of the analog audio signal and converts the analog audio signal into the PCM(Pulse Code Modulation) data as a digital audio signal. A CPU(130) takes the PCM data and performs the calculation for storing and processing the PCM data. A RAM(Random Access Memory)(140) offers the working space for calculating the PCM data by the CPU. A flash memory(150) is connected with the CPU and stores the PCM data before the transformation work and the masking noise signal and the like after the transformation work. A DAC(Digital to Analog Converter)(160) converts the digital audio signal into the analog audio signal in the multiple mixing masking noise offered by the CPU. |
