Online Processing
Acoustic Camera
Acoustical
industrial cameras consist of - an array of microphones
- a measurement amplifier
- a measurement computing device
- an analysis program
- a digital (optical) camera Noise is acquisited with microphones and presented as a colo-red topological diagram after a special type of analysis was per-
formed. The type of colored topological diagram is well known
in other areas like noise intensity measurement, order analysis,
and so on. Seeing with ears means to make visible what could be heard. Acoustic cameras allow to make noise visible. Therefore noisesources and generated frequencies can be recognized. Theorem
of acoustical camera: Objectives Narrowing down noise sourcesDetermine contained frequencies
Comparison of parts before/after making changes No. of Microphones 16 up to 64 Size of Array 100cm up to 5m Shape of Array Square, rectangle, star-shaped, available with three (3) to five (5) arms Frequency Range of the Analysis Depending on the size of the array starting from 40Hz up to 10kHz Distance to Object Near range 1m to 2m, total structure up to 50m Picture of Object Digital picture recorded over the distance between array and object Project Management Starting new projects and loading existing ones Setup Measurement Card Channel Setting, trigger and measurement conditions Sensor Data Base Input of sensor characteristics, channel association
Data acquisition Single, averaged and time recording measurement
Start up time recording with RPM measurement
Calibration module, RMS or peak setting Presentation Topographic level diagram as overlay for a picture of the structure
Total, third octave, order and narrow band level
WAV files allow hearing synthetic time responses
AVI files accompanied with sound allow reproducing the results of the analysis Computation Synthetic time responses and the associated spectral analysis
Filtering measured and synthetic time responses