Sound control technology is one of the rapidly developing control methods in recent years, which has gradually replaced the traditional buttons, remote controls and other physical operation methods, becoming a more convenient and fast choice for people. The principle of sound control refers to the use of sound waves in the air propagation of physical properties, through the acquisition of sound signals, processing, identification and other processes, to achieve the interaction of sound signals and equipment control.

Sound control technology requires the acquisition of acoustic signals, and the sensors used are generally microphones, whose role is to convert the acoustic signals in the air into electrical signals for transmission and processing. The acoustic signals picked up by the microphone are amplified by an analog amplifier circuit, and the output becomes an analog electrical signal after amplification.

The analog electrical signal is converted into a digital signal for digital processing through an analog-to-digital converter. The final realization of the control behavior of sound control technology needs to go through the two links of signal processing and signal recognition.

Signal processing refers to the sub-processing of digital signals such as filtering, noise reduction, gain, etc., in order to remove noises and interferences and improve the recognition rate of signals. Signal recognition refers to the sound signal recognition algorithm to match and recognize the voice commands issued by the user with the voice recognition library recorded in advance by the device to realize the control of the device.

Sound control technology is the process of acquiring the converted electrical signals from the microphone, and then completing the control of the equipment through digital signal processing and recognition. The application of this technology can be widely used in a variety of scenarios, such as human-computer interaction, smart home, intelligent assistant, etc., and its reliability and convenience are highly respected. In the future, with the continuous upgrading of voice-activated technology, its proportion in human daily life will continue to increase.