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Sound Pressure and Impedance (SPL-IMP)

Task of the QC BASIC Software and QC STANDARD Software

Features and Benefits

  • Optimized for quality control applications, such as end-of-line testing
  • Included in the Klippel QC Standard and Basic Software package 
  • Comprehensive testing: combined acoustic (SPL) and electric (impedance) test
  • Fast testing with high sensitivity: amplitude and speed shaping (testing from 0.2 s for full audio bandwidth)
  • Comprehensive analysis based on chirp / sine sweep in acoustic, mechanic and electric domain according to IEC 60286
    • Fundamental frequency response, opt. windowing
    • Average Level, multiple band levels
    • Polarity (phase), time delay
    • Harmonic distortion (THD, 2nd-5th)
    • Track down defects: Rub&Buzz, HOHD
    • T/S parameter identification according to IEC 60286
    • Vented box parameters (fb, Qb)
    • Impedance magnitude and phase frequency response 
  • Production noise detection to avoid false rejects
  • Limits, Grades for all measures
  • Online yield, Cpk/Ppk, control rules

    The Sound Pressure and Impedance Task (SPL-IMP) is a comprehensive measurement task dedicated to straight-forward QC testing. It combines the speed and sensitivity of the SPL Task with the precise lumped parameter measurement of the Impedance Task. The excitation signal is a logarithmic chirp that allows very fast testing over the full bandwidth from 0.2 s according to IEC standard 60268-5, 21 and 22. 

    The SPL-IMP offers outstanding sensitivity (identical to the SPL task) for all kinds of distortion caused by undesired dynamics (e.g. rocking modes), manufacturing problems and defects (e.g. Rub & Buzz). Detecting defects with the highest sensitivity requires robustness against any external noise from production (EoL), which is included in this task. Note that some feature libraries and most add-ons are not available for SPL-IMP task. Use separate SPL and Impedance task instead for such application.


    Specification


    Optional Extensions

    Options operate as plug-ins and extend the functionality of this task. 
    No additional test time is required, all options use or modify the excitation of this task.

    Add-Ons (to purchase):

    Feature Libraries (free of charge):

    • Calculate SPL Resonances:
      Provides resonance frequency and peak value for peaks in definable bands. Can be checked against limits.
    • Sequence Control:
      Repeats or skips measurement tasks with or without user interaction.
    • Square Wave Stimulus:
      Provides square wave chirp instead of sine chirp.
    • Relative Level to Golden DUT:
      Test average deviation to reference DUT
    • I/O (Input/Output)
      Adds additional I/O options (message box, set Digital Out after test)

    Requirements

    Test Hardware

    License Dongle (USB)

    PC

    Software

    Accessories





    Related Information

    Other Modules of the QC System

    Related Products 


    Standards

    International Electrotechnical Commission
    IEC 60268-5, IEC 60268-22, IEC WD 63034

    Audio Engineering Society
    AES2-1984, AES2-1984, AES X241

    International Organization for Standardization
    ISO 266