Heavy rail / Urban light rail

Rolling Stock Acoustics Testing

Eurailtest performs acoustic measurements to verify the compliance of noise level emitted by rolling stock.

Rolling stock - noise characterization

Locate, characterize and simulate the noise caused by trains as part of a type approval process.

Tests objectives :

  • Characterize noise emitted by vehicles
  • Characterize infrastructure (rail roughness and decay rate)
  • Characterize rail traffic noise
  • Investigate: Locate and characterize noise sources (power and direction) on rolling stock – whether stationary or in motion
  • Simulate passing noise, rolling noise and traffic noise

Tests facilities :

  • Acoustic antenna
  • Masts measuring up to 40m high
  • Multi-channel data acquisition device (100 channels)
  • Microphone metering system (Class 1)
  • Sound level meter (Class 1)
  • Measuring device for rail and wheel roughness
  • Sound intensity probe
  • Portable analyzer
  • Independent measuring system
  • Simulation tools: Twins, Vampass, Mithra Fer

Accreditations :

ISO/IEC 17025 awarded by COFRAC

Testing norms :

NF EN ISO 3095 – Acoustics – Measurement of noise emitted by railbound vehicles

NF S31-088 -Acoustics – Measurement of railway traffic noise for purposes of characterization

French order of 8 November 1999 – Railway infrastructure noise

French order of 19 March 2012 – Objectives, methods, safety indicators and safety and interoperability regulations applicable on the French rail network

Technical Specifications for Interoperability

Acoustic commissioning of light rail vehicles

Verify the compliance of noise levels emitted by a vehicle with the specifications and standards in force.

Tests objectives :

Measure outside and/or inside noise emitted by stationary or rail vehicles for commissioning purposes or for approval of adaptations.

Tests facilities :

  • Integrating sound level meters (SOLO type – 01dB Metravib)
  • Sound calibrators (Bruel & Kjaer)
  • Microphone conditioner (Brüel & Kjaer)
  • Multichannel conditioning (Brüel & Kjaer, Nexus type)
  • Multi-channel data acquisition device (NETDB model, 01dB-Metravib – 4 to 16 channels)
  • Software: dBTrait, dBFA

Testing norms :

NF EN ISO 3095 – Acoustics – Measurement of noise emitted by railbound vehicles

NF S31-007 – Acoustics – Measurement of noise emitted by accelerating road vehicles – Engineering method

NF S31-086 – Acoustics – Measurement of noise inside road vehicles (public transport)

NF EN ISO 3381 – Acoustics – Measurement of noise inside rail vehicles

Acoustique du matériel roulant urbain

On-board acoustics

Qualify, characterize and simulate acoustics inside trains or premises.

Tests objectives :

  • Qualify rolling stock: Indoor noise during running, deceleration and stopping, reverberation time, signal audibility, speech intelligibility
  • Evaluate speech intelligibility on board trains through the Speech Transmission Index (determined by measurement of the modulation transfer function, impulse response and values of “speech level/noise level measured” or directly by pseudo-random sequences)
  • Characterize rooms: Room criteria, impulse response, speech intelligibility, wall transparency
  • Investigate: Vibroacoustics, psychoacoustic criteria, audibility of safety signals, acoustic characteristics of sources
  • Simulate acoustics of premises: Modelling and improvement
  • Determine the threshold of audibility

Tests facilities :

  • Sound level meters (Class 1)
  • Multi-channel data acquisition device
  • Sound level meter system (Class 1)
  • Omnidirectional sources
  • Artificial mouth
  • Calculation software for psychoacoustic criteria
  • Sound intensity probe
  • Acoustic test chamber
  • Statistics calculator software
  • Simulation software

Accreditations :

ISO/IEC 17025 awarded by COFRAC

Testing norms :

NF EN ISO 3381 – Acoustics – Measurement of noise inside rail vehicles

NF EN ISO 3382-2 -Acoustics – Measurement of room acoustic parameters – Part 2: Reverberation time in ordinary rooms

NF S31-088 -Acoustics – Measurement of railway traffic noise for its characterization

NF EN 60268-16 – Sound system equipment – Part 16: Objective rating of speech intelligibility by speech transmission index

Technical Specifications for Interoperability – Rolling stock: Conventional rail, High speed

Bruit exterieur du materiel roulant ferroviaire

I should like to be contacted.

Please complete the contact form. One of our engineers will be in touch with you as soon as possible.

Go to form

Our references

ALSTOM
BOMBARDIER
RATP
SIEMENS
SNCF
SNCF-RESEAU
STADLER
ANSALDO BREDA
TRANSPOLE