Noise Camera

Features:

The Noise Camera Analysis System is a completely new design, engineered from scratch. The system utilises cutting edge technology in order to bring video and audio analysis to a new level of real-world application. Through the use of two modern embedded computer systems housed in waterproof enclosures, the Noise Camera system is capable of ontinually recording road traffic noise and processing the noise signal for comparison against operator selectable trigger criteria whilst simultaneously collecting relevant video footage of the scene when a trigger occurs.

The system utilises three subsystems which communicate with each other using wireless Ethernet technology, the Video Processing subsystem (which provides a “scene” view across up to six lanes of traffic, and a “zoom” view of a single lane, with sufficient resolution to read a number plate), the Noise Processing subsystem (which continuously records and analyses the ambient noise in accordance with AS-1259.1 - 1990 Type 1 specifications) and the System controller, which provides the system operator with a user friendly interface to configure and monitor the system in real-time.
The system operator may simultaneously view live video streaming from the “scene” and “zoom” cameras, real-time SPL data (A, C and Linear weighted) and 1/3 octave data which is represented graphically.

The system uses a removable hard drive which is sufficient to store more than 10,000 triggered events (24 hours of data if the trigger is continuously asserted), each containing 5-10s of high resolution video from two cameras, along with the digital recording of the noise. The hard disk can then be removed from the system and installed into a desktop PC and the data analysed at high speed using the analysis software.