Acoustics for Images

The beamforming technique is an “acoustics for images” technique that allows an acoustic map to be obtained in real time that is superimposed on the photographic image of the source under investigation. This makes the acoustic characteristic of the latter visible by generating an image that, in frequency, allows delineation of the source and sound pressure level.

HOW THE ACOUSTIC FOR IMAGES SYSTEM WORKS

Thanks to a powerful microphone array, the change in acoustic pressure detected by the sensors is converted into a set of pixels returned to video. The result is a series of images or high-definition video capable of precisely identifying, in terms of both frequency and level, the points in which the acoustic emission is more problematic. This innovative system makes it possible to optimise the design of machines, equipment, and components. It also provides a remedy, during works, to problems related to sound emission.

LOCALISATION OF HIGH DEFINITION ACOUSTIC SOURCES

The acoustic source localisation system with sound intensity measurement makes it possible to create high-definition acoustic maps or films with a high visual impact that can be easily interpreted.

THE MICROPHONE ARRAY

Spacing, dimensions of the array and amount of microphones determine the dynamic range and resolution of the instrument. With 120 microphones (underlying array) it is possible to conduct surveys starting at 40 Hz.

There are many applications used with the instrumentation for these surveys. One can investigate the criticalities of the structures, seeing where there are acoustic bridges. This makes it possible to identify where impulsive noises come from, like large machinery. Ultrasound video cameras can be used to detect gas and liquid leaks. These are all cases where the sound level meter cannot provide us with a solution.

Ideal for all those acoustic auditing and diagnostic services where it is important to identify the source of the disturbance, ECO Certificazioni carries out diagnostic activities using high-definition image acoustic video cameras.