Mobile system for product noise evaluation -
The LMS Test.Lab Real-Time Octave Testing System provides a mobile solution for the noise evaluation of rotating machinery against predefined targets or legislative standards. The data acquisition is performed using a portable LMS SCADAS 305 front-end with two embedded tacho inputs, supporting 12 channels for polarization microphones or generic ICP® and Voltage signals.
With the Real-time Octave Testing workbook, acquisition and analysis of multi-channel 1/1 or 1/3 ANSI compliant octave data is made easy. It provides linear and exponential averaging methods for acquiring octave data in stationary or transient operating conditions, against specified time or rpm intervals, and for monitoring dynamic, static and operational parameters. It allows the online acquisition and visualization of the most important functions such as octave cuts, OA_Levels, etc. Calculations from physical measured channels using mathematical operations provide the online derived mathematical channels. The Psycho-Acoustic Metrics add-in obtains metrics related to the human perception of noise, like articulation index, loudness or sharpness, online. The varied post-processing functions assist in global problem characterization and gaining a deeper insight into the physical processes.
