Fraunhofer Institute for Building Physics
Fraunhofer Institute for Building Physics

Insertion loss, pressure loss, flow noise of silencers and mufflers

Acoustics

© Fraunhofer IBP
Measurement Insertion loss, sound power, pressure loss
Standard DIN EN ISO 7235
Measurement object Silencers as splitters, ducted silencers, special construction of silencers, ventilation and air-conditioning components, (filters, heat exchangers, etc.)


Technical data

Test duct (L × H) 12,0 m × 0,5 m
Width of the test duct 500 to 1300 mm (50 mm steps)
Fan Flow rate ≤ 35 m3/s, pressure difference ≤ 2500 Pa
Max. size of test samples (L × H) 6,000 m × 0,498 m


Special feature

Type of test facility Wind tunnel with closed loop ventilation duct

 

More information

  • Special sound source (loudspeaker wall, 2800 W) for uniform radiation into the test duct
  • Continuously adjustable air flow speed
  • Uniform and noiseless air flow
  • Sound power measurement in the receiving room out of the air flow
  • Stationary measuring system for static and dynamic pressure

Silencer Test Facility

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