Novel camera visualises sound

An acoustic camera makes noise phenomena visible, enabling specific acoustic sources to be located in complex structures and their frequency content analysed.

Caesar DataSystems now offers an acoustic camera as an auxiliary module for its Micro-Remus NVH analysis software.

The acoustic source detection of large machines was usually made by hand with level measuring instruments or a sound intensity probe.

This manual scanning can now be replaced by a stationary, organised, multiple array of microphones.

As a function of the size of the microphone array (up to 5m square) and of the object distance (up to 50m) complete structures, for example the tractor unit of a truck, can be examined.

The measurements from the array and the subsequent evaluation are automated to a large extent.

The result is a noise map, which is overlaid on a digital image of the machine.

The analysis can be predefined to provide maps of sound intensity, harmonics or be systematically searched for individual spurious frequencies.

The software runs on all current Windows platforms.

Further, by agreed co-operation with B+S Multidata, the Integra data acquisition system can now offer programmable signal conditioning, data recording, online visualisation and analysis in one rugged mobile package.

The modular Integra enables microphone, strain gauge, ICP, LVDT and thermocouple data to be simultaneously acquired with a maximum aggregate scanning rate of 1.4Msample/s and digitised with 16bit resolution.

Digital and pulse inputs, as well as a CANbus interface are also available.

The integrated PC has its own keyboard and bright TFT display with all standard interfaces (serial, parallel, USB, PCMCIA, LAN).

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