Technical Report: Sound and its Sensors 2

Acoustic intensity is a method of understanding sound as "the flow of energy passing through a unit area per unit time," and its unit of measurement is W/m². Acoustic intensity microphone probes are designed to measure this flow of sound energy by incorporating multiple microphones, allowing for the capture of both sound intensity and the direction of the flow as vector quantities. Conventional microphones can measure sound pressure (unit: Pa), which represents the intensity of sound at a specific location (one point), but they cannot measure the direction of the flow.

Acoustic intensity microphones, due to the characteristics described above, are used for sound source detection and acoustic power measurement.

Please refer to the technical report, "What is a Sound Level Meter?".