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Soft dB OBSI Software User Guide User Manual

Page 8

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4

General OBSI Setup - Probe position

The current OBSI standard specifies use of an ASTM F2493 Standard Reference Test Tire (SRTT)
(P225/60R16) available from Michelin. A purchasing procedure is detailed in appendix.

Mic A

Mic B

5/8” - 16 mm

3” - 76 mm

4” - 102 mm

Leading and trailing

probes must be placed
4.125” from the center

of the wheel hub