Track 7: Noise Evaluation
Overview
Track 7 is used for noise evaluation. It includes a drumming surface that accentuates low frequency noise, useful for evaluating interior noise. Another area of this track offers special surfaces and highly-sensitive microphones for measuring pass-by noise. Track 7 also includes an underground camera station that Michelin uses for evaluating how tire treads disperse water.
Dimensions
- 2650 feet long (excluding turning loops)
Surface
- Material: Asphalt
- Surface Texture (Macro/Micro): Smooth/Rough
- Aggregate: Granite
Usage / Features
- Pass-by noise
- In-car noise
- Ultra sensitive noise detection
- Low background noise
- Transparent track section
- Drumming surface (closely spaced undulations that accentuate low frequency noise)
- Underground, wet tread footprint photography for hydroplaning
