Noise and vibration (during road testing)

We perform noise and vibration measurements during road testing, making use of multichannel DAQ devices by firms such as: Brüel&Kjaer, OROS and DEWESOFT.
 

Analyses 

  • Frequency (FFT, CPB, FRF and others)
  • Time Domain
  • Order
  • Torsional vibration measurements
  • Operational Deflection Shapes (ODS)
  • Overall
  • Plots as a function of time, rotational speed, frequency, order, etc.
 

Transducers

  • Single- and three-axis vibration sensors (ICP, charge)
  • Non-contact displacement sensors (CAPACITEC)
  • laser for measurement of torsional vibrations (Bruel&Kjaer)
  • force transducers (PCB), modal hammer (Bruel&Kjaer)
  • polarised (200V) class 1 microphone (Bruel&Kjaer and G.R.A.S.)
  • sound intensity meter (G.R.A.S.)
 

Norms

  • UNECE Regulation No. 59
  • UNECE Regulation No. 51
  • UNECE Regulation No. 28
  • PN-ISO 362:2003
  • PN-ISO 7188:2003
  • Fiat 7.R3000, 7.R2100*
*Customer to provide norms for testing
Document No. Title/Description
Regulamin nr 59 EKG ONZ/ Regulation No 59 UN/ECE / Regelung Nr. 59 UN/ECE Regulation No 59 of the Economic Commission for Europe of the United Nations (UN/ECE) — Uniform provisions concerning the approval of replacement silencing systems
Regulamin nr 51 EKG ONZ / Regulation No 51 UNECE / Regelung Nr. 51 UNECE Regulation No 51 of the Economic Commission for Europe of the United Nations (UN/ECE) — Uniform provisions concerning the approval of motor vehicles having at least four wheels with regard to their noise emissions
Regulamin nr 28 EKG ONZ/ Regulation No 28 UN/ECE / Regelung Nr. 28 UN/ECE Regulation No 28 of the Economic Commission for Europe of the United Nations (UN/ECE) — Uniform provisions concerning the approval of audible warning devices and of motor vehicles with regard to their audible signals
PN-ISO 362:2003 Acoustics - Measurement of noise emitted by accelerating road vehicles - Engineering method
PN-ISO 7188:2003 Acoustics - Measurement of noise emitted by passenger cars under conditions representative of urban driving
Fiat 7.R3000 Fiat 7.R3000
Fiat 7.R2100 Fiat 7.R2100