The sound sensor is an electronic device that can be used to detect and measure the sound of the surrounding environment. It usually consists of a microphone and an amplifier circuit and can convert the detected sound into an electrical signal. The sound sensor is often used for various purposes, such as Audio recording, noise monitoring, speech recognition, etc. The above is a preliminary introduction to the sound sensor. The following is a detailed introduction to the types and functions of the sound sensor.

The application of sound sensors With the rapid development of sensors, sound sensors have also risen rapidly, and have been applied to daily life, military, medical, industry, territorial waters, aerospace, etc., and have become an indispensable part of the development of modern society.

1. Application in military

Sound sensors have been widely used in ground sensor reconnaissance and surveillance systems. Its biggest advantage is its strong resolution. If the moving target is a person, you can not only hear the sound directly, but also identify its nationality, identity and conversation content according to the voice. If the moving target is a vehicle, the type of vehicle can be judged based on the sound.

2. Application in medical treatment

Fiber-optic microphones have natural anti-interference ability to magnetic fields, and can be used in MRI communication. It is the only microphone that can communicate between patients and doctors during MRI scans.

3. Application in daily life

Application on Voice Activated Switch

The use of sound-activated switches is the specific application of sound sensors in people's real life. As a part of electronic technology, the voice-activated switches that sound sensors participate in realize the goals of automatic lighting of electric lights, energy saving and prolonging the service life of lights.

The voice control circuit does not need a special traditional switch. In the dark night, as long as someone passes by and makes a sound, the light will automatically turn on, and when the person leaves, the light will automatically turn off. Voice-activated switches are widely used in public places such as stairs, corridors, office areas, guest houses, etc. Voice-activated switches bring a lot of convenience to people's work and life, and are more and more widely used.

In addition, the voice control circuit is an electronic device for the sound and light control circuit, so it can convert the sound and light into electrical signals, thereby realizing the control of various electrical equipment. Therefore, the voice control circuit is used in many household appliances and industrial electrical equipment. There are a wide range of applications.

Application in Sound Control Sprinkler and Dust Eliminator

The operation of the voice-activated sprinkler is very simple. As long as the person makes a sound and tells it to sprinkle water and dust, it can start working. The voice-activated sprinkler actually controls and starts the solenoid valve through the voice-activated switch. Small sprinklers are used in many public places, such as squares, schools, hospitals, parks, etc.

In addition, it is also widely used in many factories and enterprises. For example, it is used to sprinkle water and dust on coal piles and soil piles. Put the sprinkler on the pile and issue a start .

command with a voice.

The function and principle of the sound sensor

The function of the sound sensor is equivalent to a microphone, which is used to receive sound waves and display the vibration image of the sound, but it cannot measure the intensity of the noise. The sensor has a built-in sound-sensitive condenser electret microphone. The sound wave makes the electret membrane in the microphone vibrate, resulting in a change in capacitance, which produces a corresponding change of tiny electric music, which is then converted into a voltage of 0-5V, which is collected by the collector through A/D conversion.

Accept and send to the computer.

The sensor has a built-in capacitive electret microphone that is sensitive to sound. The sound waves vibrate the electret film in the microphone, resulting in a change in capacitance and a correspondingly small voltage. This voltage is then converted into a voltage of 0-5V, accepted by the collector through A/D conversion, and sent to the computer, which can display the vibration image of the sound. However, the intensity of the noise cannot be measured.

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