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):
- Meta Hearing Technology (MHT):
Defect detection beyond human hearing - External Synchronization (SYN):
Synchronize digital audio (e.g. Bluetooth) and trigger open-loop tests
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
- KLIPPEL Analyzer (KA3) or
- Production Analyzer (PA) or
- 3rd party audio interface (sound card)
- Operation with QC Stand-alone Software:
- Smart amplifier providing voltage/current sensing and audio streaming (e.g., Powersoft Mezzo)
License Dongle (USB)
PC
Software
- Included in QC Standard and QC Basic
- QC Stand-alone Software
- Available as module for R&D Software 210 or higher
Accessories
- Microphones
- Power Amplifier
- KA3 Amplifier Card or
- KA3 QC Card or
- 3rd party amplifier
Applications
Application Notes
Demo Videos
Related Information
Other Modules of the QC System
- Sound Pressure Task (SPL):
Measurement of frequency response, THD and Rub & Buzz
- Impedance Task (IMP):
Linear Parameter Measurement (TS-Parameter) - Spectrum Analysis (SAN):
FFT spectrum, frequency response, A-weighted SPL and distortion with/without noise generator or user-defined stimulus for noise & vibration or audio system testing - Match Speaker Tool (MSP):
Find best matching pairs from a pool of speakers - Statistics (STAT):
Statistical overview of Klippel measurement data (1D and 2D data), poolbased visualization of measures allows quick assessment of variances and comparisons between test object groups - Multi-Tone Distortion Task (MTD)
Related Products
- Linear Parameter Measurement (LPM):
For intermittent testing (without laser measurement) - Transfer Function Measurement (TRF):
Measurement of transfer function and harmonic distortion - Time Frequency Analysis (TFA):
3D visualization tool vs time and frequency for impulse and time responses using wavelets, filter-bank or STFT - Live Audio Analyzer (LAA):
Long-term monitoring of 5 signals simultaneously, examine time and frequency data, heating and ageing, measure distortion with music or arbitrary stimulus
Standards
International Electrotechnical Commission
IEC 60268-5, IEC 60268-22, IEC WD 63034
Audio Engineering Society
AES2-1984, AES2-1984, AES X241