Sound Pressure (SPL)
Task of the QC STANDARD Software and Optional Module for the R&D System
Features and Benefits
- Optimized for quality control applications, such as end-of-line testing
- Included in the Klippel QC Standard Software package
- Fast testing with high sensitivity: amplitude and speed shaping (testing from 200 ms for full bandwidth)
- Production noise detection to avoid false rejects
- Limits, grades for all measures
- Online yield, Cpk/Ppk, control rules
- Comprehensive analysis based on chirp / sine sweep for acoustic, mechanical and electrical signals according to IEC 60286
- Amplitude frequency response, opt. windowing
- Average level, multiple band level
- Phase, polarity, time delay
- Harmonic distortion (THD, 2nd-5th)
- Track down defects: Rub&Buzz, HOHD, air leakage noise
The Sound Pressure Task (SPL) is a universal measurement task optimized for QC applications for all kinds of electrical, mechanical and acoustical signals in the time and frequency domain. The excitation signal is a logarithmic chirp that allows very fast testing of the most important acoustic characteristics over the full bandwidth in no more than 200 ms according to IEC standard 60268-5 and 21. The chirp signal provides a dense excitation spectrum, giving higher frequency resolution than a stepped sine sweep.
The SPL offers outstanding sensitivity 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) or in a lab environment (RnD) which is included in this task.
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
• Production Noise Immunity (PNI):
Coping with noisy environment
• External Synchronization (SYN):
Synchronize digital audio (e.g. Bluetooth) and trigger open-loop tests
• Air Leak Detection (ALD):
Detect air leaks in transducers and audio systems
• Spectrogram 3D Limits (3DL):
Powerful and intuitive defect (Rub&Buzz) analysis based on auditory time/frequency (spectrogram) analysis
• Dynamic DC Check (DCX):
Measurement of AC/DC displacement with laser (DC input modification of Production Analyzer hardware
required)
• Hi-2 Weighted Harmonic Distortion (Hi-2):
Blat-Distortion
• Perceptive Metrics based on the Human Ear (QC-EAR)
Features 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.
Requirements
Test Hardware
- KLIPPEL Analyzer (KA3) or
- Production Analyzer (PA) or
- 3rd party audio interface (sound card)
License Dongle (USB)
PC
Software
- included in QC Standard from version 1.0
- Not available for QC Basic
- 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
Related Information
Other Modules of the QC System
- Sound Pressure and Impedance (SPL-IMP):
Combined measurement of acoustic and electric characteristics based on sine sweep chirp - 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
- 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
Consumer Electronics Association
CEA-CEB19, CEA-803 R200X, CEA-2006-A, CEA-2019, CEA-2031, CEA-2034 (ANSI)
International Electrotechnical Commission
IEC 60268-1, IEC 60268-3, IEC 60268-4, IEC 60268-5, IEC 60268-7, IEC 60268-16, IEC 60268-21, IEC 60268-22, IEC 61094-5, IEC 61305-5, IEC 61842, IEC WD 63034
European Standards
BS EN 54-24, BS EN 50332
Audio Engineering Society
AES2-1984, AES2-1984, AES17-2009, AES56-2008, AES X223, AES X241
Institute of Electrical and Electronics Engineers
IEEE 269, IEEE 1206, IEEE 1329, IEEE 1652
American National Standards Institute
ANSI S1.15-Part 1, ANSI S1.15-Part 2, ANSI S3.7, ANSI S3.22, ANSI S3.25, ANSI S12.42
International Telecommunication Union
ITU-R Recommendation BS. 775-2, ITU-R Recommendation BS. 1116, ITU-R Recommendation BS. 1534-1, ITU-T Recommendation P.79
International Organization for Standardization
ISO 266:1997, ISO 4869-3
Telecommunications Industry Association
TIA-470, TIA-810, TIA-920
American Society for Testing and Materials
ASTM F2504-05
