Scantek Inc  //  Brands  //  SoftdB  //  Special Test Systems OBSI Software

Soft dB OBSI Software (On Board Sound Intensity)


The SoftdB OBSI Software is the first turn-key solution for the measurement of On-Board Sound Intensity (OBSI) Method (AASHTO Designation: TP76-10). This software is used both for real-time acquisition and processing, and post-processing of recorded files. Primarily intended for the Conductor platform, the OBSI software can be used with the Alto6-i USB analyser connected to a PC.

The OBSI method is a technique to measure tire-pavement noise using two phase matched microphones placed in a side-by-side configuration. The microphones are attached to the hub of a wheel using a special fixture with one microphone located in the leading edge of the tire while the other microphone is placed near the trailing edge. This technique uses a reference tire according to ASTM F2493.


  • Versatile Customizable Interface
  • Time History, 1/3 Octave Spectrum, FFT Spectrum, Numerical Display
  • Extensive Data Processing
  • Intensity, Pressure, PI Index, Coherence, Vehicle Speed, Travel Distance
  • 1 or 2 Sound-Intensity Probe Configurations (Leading and/or Trailing Edge Probe
  • Tachometer Input
  • Real-Time and Post-Processing Audio Feedback


 Download OBSI Spec Sheet 

 Download OBSI User Guide




Soft dB

Sound Level Meters
Sound Intensity Mapping
Multi-Channel Systems
SoftdB Alto: 6 Channel Acoustic and Vibration Instrument
Room Acoustics Modeling
Special Test Systems
OBSI Software