Infrasonic sensor basics | Infrasonic sensor network working

This page describes basic function of Infrasonic sensor. It mentions working Infrasonic sensor network.

Infrasonic is the term which refers to study of sound waves which are below the frequency limit that humans can hear. It falls in the range from 0.1 Hz to about 20 Hz. There are many applications of infrasonics such as earthquake monitoring, earth exploration for petroleum and rocks, obstacle determination, nuclear explosion, possible plane explosion etc.

Infrasonic sensor network working

Infrasonic sensor network

• Underground explosions or atmospheric explosions create very low frequency waves known as Infrasound waves which are inaudible to human beings.
• Typical Infrasound network consists of stations. Each station composed of bunch of infrasonic sensors. The distance between stations is about 1-3 Km.

Infrasonic sensor elements

• When the explosion occurs, audible waves travel to the infrasonic sensors through pipes.
• The sensor is located at the center of array elements which converts infrasound waves to the electrical impulses.
• Each sensor provides data to the nearby antenna tower which transmits the sensor data to the master radio station either using radio frequency waves or using fibre optic cable.
• The data collected by master station is further prepared for transmission to the satellite.
• The satellite relays the data for further analysis to the ground station facility (such as CTBTO, Vienna, Austria ). This will provide information about which event might have occurred on the earth or ground or in the sea or in the air.


Also refer IoT compliant sensors which includes ambient light sensor, optical sensor, gesture sensor, proximity sensor, touch sensor, fingerprint sensor etc.

Refer Sensors and transducers article which covers types, basic functions and provide links to sensors and transducers. It include temperature sensor, humidity sensor, strain sensor, proximity or occupancy sensor, force or load sensor, voltage and current sensor, pressure sensor, speed sensor, resistance sensor, power sensor, level sensor, event or state sensor etc.

Sensors and Transducers Related Links

Proximity Sensor
Occupancy Sensor vs Motion Sensor
LVDT and RVDT sensor
Position, displacement and level sensor
force sensor and strain sensor
temperature sensor
pressure sensor
Humidity sensor
MEMS sensor
Touch sensor
Haptic sensor
Wireless sensor

RF and Wireless Terminologies