Acoustic Imaging FAQs

Instead of a lens, an acoustic imager uses an array of microphones—often 100 or more—to capture sound. Each microphone’s signal is processed to determine the sound’s origin, volume, and frequency composition, creating the acoustic image. Notably, these sounds are usually ultrasonic, beyond the range of human hearing. Additionally, the large microphone array, its arrangement, and advanced processing allow the system to focus like a lens, enabling precise localisation of sound sources.

At the moment, the two main reasons for acoustic imaging to be deployed is for detecting Partial Discharge (PD) in medium and high voltage electrical systems, and for detecting gas leaks.

However, the technology is still new, and innovative ideas are certainly going to be found. Any industry that works with pressurised gases could benefit from detecting leakages - be that natural gas, diving equipment, compressed air tools or any number of applications. See our list of industries that could need acoustic imaging here.

Often, the environments that acoustic imaging is being used for can be hazardous. Inspections require gaining close access to plant and machinary as well as additional health & safety requirements (often climbing ladders or gaining access to small spaces). Acoustic image surveys can be done from a distance. They are also considerably quicker and more accurate in their detection. Overall, an acoustic imaging survey can very often be undertaken much quicker and with less risk.