The principle of sound sensor

The principle of sound sensor

How Sound Sensors Work

The sound sensor incorporates a sound-sensitive capacitive electret microphone. Acoustic waves oscillate the electret film in the microphone, causing a change in capacitance and producing a tiny voltage that changes accordingly. This voltage is then converted to a voltage of 0-5V, accepted by the data collector after A/D conversion, and transmitted to the computer.

The sound sensor acts like a microphone. It is used to receive sound waves and show vibrational images of the sound. However, the intensity of noise cannot be measured.

HX-SLM3 sound sensor

HX-SLM3 sound sensor is an industrial standard output (4 ~ 20mA) integrated noise monitor/acoustic sensor independently developed and produced by Chengdu Kingsley Automation Technology Co., Ltd. The HX-SLM3 sound sensor is designed for noise testing needs and supports onsite The noise decibel value is displayed in real time and is compatible with the user's monitoring system. The noise can be monitored in fixed days. The alarm limit can be set to exceed the ambient noise alarm. The monitor's high precision, versatility, and high performance-to-price ratio are its distinguishing features. It is applied to the noise monitoring of traffic trunk roads, the noise detection at the boundary of industrial enterprises, the detection of noise in the construction site, the detection of environmental noise in urban areas, and the monitoring and assessment of environmental noise in social life.

HX-SLM3 Sound Sensor Performance Index

Measuring range: 30 to 130dB (A)

Frequency range: 20Hz～12kHz

Frequency weighting: A (weighting)

Time weighting: F (fast)

Output interface: 4-20mA / RS485 (optional)

Maximum error: 0.5dB;

Power supply: 24V DC

Size: 200mm*147mm*41mm

Working temperature: -20°C～70°C

Relative humidity: 25% to 90%

Air pressure: 65KPa ~ 108KPa