Spectrogram 3D Limits (3DL)

• Time-Frequency Analysis
• Easy limit setting
• Fingerprint of defects (as Rub&Buzz)
• Sensitive Rub&Buzz detection
• Optimize Rub&Buzz filter settings
• Detect excitation and spectral position of limit violation

The Spectrogram 3D Limits is an add-On to the SPL Task of the Klippel QC Software. It performs a time-frequency analysis with a high time resolution by applying a filter bank based on an auditory model. The analysis is performed parallel to the data acquisition to avoid any performance impairment. The resulting spectrograms make it possible to identify the spectral fingerprint of a defective unit as well as the excitation frequency that activates it. The unique exceedance plot reveals the location of limit violation in the time-frequency plot. Additional 2D projection plots help reduce complexity and provide quick diagnostic information.

S63_QC 3DL - Spectrogram 3D Limits

Test Hardware

• Klippel Analyzer 3 (KA3) or 
• Production Analyzer (PA) or 
• 3^rd party audio interface (sound card)

License Dongle (USB)

PC

Software

• QC Standard Software 6.2 or above or 
• SPL Task for R&D application (dB-Lab 210.560 or above)

Accessories

• Power amplifier
  • KA3 Amplifier Card or 
  • KA3 QC Card or 
  • 3^rd party amplifier

• Microphone

Other Modules of the QC System

• Sound Pressure Task (SPL)
  Measurement of frequency, THD and Rub & Buzz

Related Products

• Time Frequency Analysis (TFA)
  3D visualization tool vs. time and frequency for impulse and time responses using wavelets, 
  filter-bank or STET