NOISE MEASUREMENTS IN SEMI-ANECHOIC CHAMBER
SCOPE:
Experimental assessment of noise distribution in assemblies
Noise scans using acoustic camera
Noise monitoring by various microphones
Sample operation induced noises e.g. kinematic functions noise - linear, rotational
Vibration induced noises at specific frequencies, using low-noise shaker with a semi-anechoic chamber assembly
Subjective sound assessment - noise occurrence
Objective sound assessment by microphones with quantitative data expression
Frequency analyses - octave spectrum
Samples with suspected components fixation analyses
EQUIPMENT:
Semi-anechoic chamber with internal operating dimensions of 1,8 x 1,8 x 2,0 m, equipped with 1,6kN shaker Tira TV54216
Chamber noise level: without shaker 17 dB / with shaker >35 dB (based on vibration profile)
Accelerometers (1-axis, 3-axes) B&K, Dytran, Kistler, PCB
Vibrometer Polytec OFV5000/OFV-505MR
Acoustic cameras (large and small) & CAE Software
Free-field Microphone Set G.R.A.S, type 46AE
BENEFITS:
Client´s physical presence at test execution
In-house workshop and microscope lab adjacent to the testing room
Video record and analysis of the measured phenomena
STANDARDS:
PR 311.2, PR 311.4, PR 311.5 (BMW)
Various industry and customer standards
