Contrôle de l'efficacité du filtre Breveté Ai

Test-Report No.: 2561702-1 Date: 20-09-2017 ImpulsePeak Insertion loss (IPIL) (Partial test) Page4of 6 _______________________________________________________________________________________ Results: ImpulsePeak InsertionLoss IPIL X Measurement condition: Number of samples tested: 2 Sampling rate: 100 kHz Build inAnti-Aliasing filter (AAF): bypass Digitized signals are filtered in softwarewith a 20 kHz 6 th order Bessel filter. Themeasurementswere conducted in our hemi-anechoic room. Remark: Shock tube conditions Nominal range Polyester foil Pressureof shock tube Distance toHorn 133dB 7µm 0.2bar 4.1meter 150dB 19µm 0.6bar 2.0meter 166dB 75µm 2.6bar 1.2meter Nominal impulsepeak level A-duration (ms) 130dB 0,78–1,06 150dB 0,73–1,00 166dB 0,82–0,84 55 60 65 70 75 80 85 90 95 100 105 Sound pressure level (dB) 31.5 40 50 63 80 100 125 160 200 250 315 400 500 630 800 1 1.25 1.6 2 2.5 3.15 4 5 6.3 8 10 12.5 31.5 63 125 250 500 1 2 4 8 Hz kHz Frequency (Hz) 166dB 158dB 150dB 130dB Figure 1: Typical Spectrum (third octave analysis) of the impulse peak level range