Visualizing Sound with the FLIR Si124 Acoustic Imaging Camera

Believe it or not, it’s now possible to visualize sound. The FLIR Si124 industrial acoustic imaging camera produces a precise acoustic image that is transposed in real time on top of a digital camera picture. The blended visual and sound image is presented live on screen, visually displaying ultrasonic information and allowing the user to accurately pinpoint the source of the sound.


Acoustic imaging is used for two primary purposes: air leak detection, and locating discharge from high-voltage systems. Using sound imaging from 124 built-in microphones, the FLIR Si124 can help professionals identify leaks and partial discharge up to 10 times faster than with traditional methods.

Air Leak Detection

Compressed air is the single most expensive energy source across all factory types, yet up to one-third of that compressed air gets lost to leaks and inefficiencies. The human ear can sometimes hear an air leak in a quiet environment, but in a typical industrial environment it’s impossible to hear even bigger leaks due to loud background noise. Fortunately, the Si124 filters out the industrial noise, allowing professionals to “visualize” sound even in noisy environments.

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High-Voltage Discharge

In electrical systems, partial discharge can lead to equipment failures and unplanned downtime. With the Si124, professionals can safely detect problems from up to 100 meters away and analyze discharge patterns. The camera classifies three partial discharge types, including surface discharge, floating discharge, and discharge into air. Knowing the type and severity of the discharge enables the facility to schedule maintenance to minimize failures and downtime.

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The Si124 requires minimal training and can be used one-handed. Through a regular maintenance routine, acoustic imaging can help facilities save money on utility bills and the expense of installing new compressors. To learn more, please visit FLIR.com/Si124.

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