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Acoustic Camera announced
Source: | Author:TECLAB | Published time: 2015-08-12 | 3029 Views | Share:
Acoustic Source Localization and Analysis

TECLAB developed an advanced Acoustic camera system with Chinese Academy of Sciences for Acoustic Source Localization and Analysis. Acoustic camera is an imaging device used to locate sound sources and to characterize them.

Advanced Acoustic camera system consists 36-128 microphones,and this  microphones array can be set to spiral,double- spiral, spherical or other shape according to the testing requirements.



advanced Acoustic camera  64 spiral system technical specification:
Product Model：AACS-64spiral;
Aperture  (Duty Ratio)：2m（6%）; Number of models switching: 2;
Number of Microphones (specification)：64（1/2 inch measurement level）;
Sources’ Separation Lower Frequency Limit：200Hz/400Hz;
No Virtual Image Upper Frequency Limit：3000Hz/12kHz;
Measurement Frequency Range：：2Hz-18kHz;
Positioning Accuracy (1kHz &1m)：1°、1cm;
Spatial  Resolution (1kHz &1m)：2°、2cm;
Sound to Light Offset(1kHz)：0.3°;
Sound Imaging Pixels: 418k;
Frame Rate: 4-25 fps;
Dynamic Range of Microphone: 120/140dB,160/180dB;
Dynamic Rang of Array：10~140dB,50~160dB;
Gain of Array (SNR addition):22dB(±35°);
Signal  Enhancement：36dB;
Viewing Angle(FOV)：±28º~±35 º﹠±27º;
Operating Temperature, Allowed Humidity：-40℃～+65℃：<99%;
Electromagnetic Compatibility (EMC)：10-10MHz, 200v, Military Level;
Detection Range：0.5m～200m;
Normal Operating Voltage/Total Current：±5v/(+260mA,-150mA);
Total Power Consumption (Allowed Voltage)：4w（2.5V～6V）;
Time of a ±6v Battery Continuous supplying：≥10 hours;
Weight & Size of Array Body, Before and After Packaging：35kg & 109cm×109cm×27cm;
Size of Array Body Packing Box：15kg，102cm×102cm×24cm.

There are many applications of the acoustic camera, with most focusing on noise reduction. The camera is frequently applied to improve the noise emission of vehicles (such as cars, airplanes]) and trains, structures — such as wind turbines.

Acoustic cameras are not only used to measure the exterior emission of products but also to improve the comfort inside cabins of cars,train or airplanes. Spherical acoustic camera are preferred in this type of application because the three-dimensional placement of the microphone allow to localize sound sources in every directions.

Troubleshooting of faults that occur in machines and mechanical parts can be accomplished with an acoustic camera. To find where the problem lies, the sound mapping of a properly functional machine can be compared to one of a dysfunctional machine.

A similar setup of the acoustic camera can be used to study the noise inside passenger carts during train operation. Alternatively, the camera can be set up outside, in an area near the train tracks, to observe the train as it goes by. This can give another perspective of the noise that might be heard inside the train. Additionally, an outside setup can be used to examine the squealing of train wheels caused by a curve in the tracks.
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