ROAD NOISE TEST ROAD AND ROAD NOISE TEST METHOD

摘要

PPROBLEM TO BE SOLVED: To provide a road noise test road enabling the easy evaluation of road noise by increasing the sound pressure level of the road noise and also provide a road noise test method. PSOLUTION: This road noise test road 1 is used for testing the road noise of a vehicle 10. The road noise test road 1 is formed by distributing at least twenty small holes 7 per square meter on the surface 3a of a paved layer 3 on which a paving material 6 is laid down. PCOPYRIGHT: (C)2009,JPO&INPIT