How can we reduce noise?PossibleNoiseReductionTechnologies(85%lightand15%heavytraffic)10987PotentialReduction[dB]RoadTyreEngine40km/h70km/h100km/hSpeed11August31,2025TUDelft
August 31, 2025 11 How can we reduce noise? 40 km/h 70 km/h 100 km/h Engine Tyre Road 0 1 2 3 4 5 6 7 8 9 10 Potential Reduction [dB] Speed Possible Noise Reduction Technologies (85% light and 15% heavy traffic)
Noiseand road surfaceNoiseProduction WearingCoursestravelled byTrucks9088[8+Twinlay8DrainAsphalt6/16SurfaceDressing4/88DenseAsphalt0/16107674405060708090100110Speed [km/h]12August31,2025TUDelft
August 31, 2025 12 Noise and road surface Noise Production Wearing Courses travelled by Trucks 74 76 78 80 82 84 86 88 90 40 50 60 70 80 90 100 110 Speed [km/h] Noise Level [dB(A)] Twinlay Drain Asphalt 6/16 Surface Dressing 4/8 Dense Asphalt 0/16
Tire/roadnoiseNoisegeneratedfrom contact betweentyreand roadTyre profile blocks"hit"the roadRoad pavement stones"hit"the tyreMovingdirectionImprintoftireusedinLintrack199013August31,20252TUDelft
Tire/road noise August 31, 2025 13 • Noise generated from contact between tyre and road • Tyre profile blocks “hit” the road • Road pavement stones “hit” the tyre
Noise to due rolling tiresVibration of the tireHorneffect.Air-pumpingStick-slip.Profile resonances of the tire contact area.August31,202514TUDelft
August 31, 2025 14 Noise to due rolling tires • Vibration of the tire. • Horn effect. • Air-pumping. • Stick-slip. • Profile resonances of the tire contact area
Tyre/roadnoise generationtyreprofiletypewidthBothtireand(dynamic)stiffnesspavementsurface haveinfluencesoundpropagationtyre/roadcontactradiationabsorptioninteractionreflectedhorn'effecradialabsorbedtangentialroad surfacetextureabsorptionmechanicalimpedanceflowresistance15NTUDelft
15 Tyre/road noise generation radial tangential tyre/road contact interaction 'horn' effect sound radiation propagation absorption in absorbed reflected road surface texture absorption mechanical impedance flow resistance tyre profile type width Both tire and (dynamic) stiffness pavement surface have influence