Main Menu RT-Speaker Software
Main Menu RT-Speaker Software
Speaker & Microphone Testing
Production testing for speakers and microphones.
Speaker Testing
The PureSound™ Speaker Test System is a comprehensive test solution with a unique and reliable defects analysis. The objective Rub & Buzz analysis correlates 100% to the subjective perception of the human ear. The typical cycle time for a complete speaker test is less than one second.
- Typical cycle time < 1 second
- Accurate and consistent test results
- Rub&Buzz detection with 100% correlation to human ear
Overview
Key features for a modern, state-of-the-art test system are speed, simplicity, reproducibility and automation in a factory environment. The PureSound speaker test system exactly answers these needs. The key element is the unique Rub & Buzz defects analysis with a 100% correlation to the human ear. It replaces the subjective human ear perception against an objective, reliable and repeatable test feature.
The turnkey speaker test solution is provided by the FX100 and operated via the RT-Speaker PC software. It is optimized for high-volume quality control of single speaker components, pre-assembled parts or finished products.
Measurement Parameters
- Frequency Response
- Distortion THD, THD+N, k2-k35
- Impedance Response
- Resonance Frequencies f0
- Sound Pressure Level dBSPL
- Speaker Polarity
- Rub & Buzz defects analysis with a 100% correlation to the human ear
- Thiele/Small Parameters
- DC Resistance
Turnkey Solution
The design of the FX100 Audio Analyzer was influenced by the key requirements for production testing: Flexibility, speed and ease of integration.
Flexibility
The scalable hardware concept allows customization of the FX100 hardware according to the individual requirements. Plug-in options offer full flexibility such as additional measuring channels, input and output switchers or impedance measurement modules. The audio analyzer grows with the application for manually-operated and fully-automated production lines.
Compact Power
The FX100 with the FX-SIP impedance module is a very compact loudspeaker test system. Plug in an M2010 microphone and all your hardware requirements are complete. No external amplifier is required.
Measurement Speed
Fast GlideSweeps obtain all relevant measurement results from one short stimulus; typically less than one second. The FX100 has been optimized for factory noise immunity and high volume production. The sequence mode provides automated measurement of customized test sequences including Pass/Fail decision.
Ease of Integration
The FX100 Audio Analyzer bridges the demands of QC engineering for using the same instrument in R&D, sample inspection and on the production floor. Individual application projects may be transferred around the globe for fast setup.
PureSound™ Speaker Measurement (optional)
Leading-edge measurement technology unveils the speaker parameters including Rub&Buzz with one single stimulus. The patented PureSound™ technology provides a complete speaker characterization with an unmatched correlation to the human hearing. Two speakers may be measured at the same time! PureSound™ includes the turnkey production software.
Automation
All measurement data may be logged for detailed manufacturing control. The built-in digital I/O interface connects to peripheral devices, such as a foot switch or a stack light.
Production Software RT-Speaker
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A simple PASSED/FAILED readout or a detailed view of all measured speaker parameters is provided to the operator. System integration into existing high volume production lines and the connection to host controllers is very simple. The patented measurement algorithms have been optimized for factory noise immunity.
Measurements can be started by an external button or automatically as the speaker is connected. The built-in FX100 digital IO interface can be used for automated operation, such as
Communicating with a PLC
Test result indication through a stack-light
Triggering a measurement with a footswitch
External pre- or post-test actions independent of test result
Automated splitting of PASSED/FAILED samples
Individual bin splitting of different FAILED samples
Loudspeaker Impedance Testing
The tests are executed with a logarithmically swept GlideSweep. This technology ensures very fast, yet precise measurement results. The FX-SIP module with its built-in power amplifier supports the simplest possible wiring. In order to prevent systematic measurement errors such as cable impedance, a 4-wire connection cable with sense lines is provided.
Measured Parameters
In addition to the impedance response, a wide range of derived or separate results can be calculated or measured, too. Thus, the complete electrical characterization of the device under test (DUT) can be acquired in only one test cycle.
- Resonance frequencies
- Thiele/Small parameters
- DC-resistance
Regular (low impedance) Loudspeakers
Low to medium power devices (mobile phone transducers, consumer audio, multimedia, automotive etc.) are covered by the FX-SIP module. Besides the impedance measurement functionality, it also provides a built-in audio amplifier, thus featuring a very compact and easy-to-use test solution. The FX-SIP module is suitable for speakers up to 30 W into 2 Ω or 4 Ω, or up to 20 W into 8 Ω.
Medium to high power loudspeakers (e.g. Pro-Audio, HiFi) are covered by the FX-SIH module, which can test loudspeakers from 1 W up to >1 kW. The FX-SIH requires an external power amplifier in the test setup.
Example of a mid-range driver impedance response:
70 V /100 V Loudspeakers
Together with the 100 V RT-IB Impedance box, the FX100 can also measure the impedance response of distributed audio 70 V / 100 V loudspeaker systems.
For loudspeakers up to 30 kΩ nominal impedance
Selectable shunt resistor: 1 Ω, 20 Ω or 400 Ω
Impedance response
Resonance frequency
Impedance at resonance frequencyExample of a 100 V loudspeaker impedance response:
Loudspeaker Directivity Measurement with the FX100
Introduction to setting up and operating a solution that measures the polar plot of a loudspeaker.
Speaker Test System for
High Volume and Automated Testing of Speakers < 30W
- FLEXUS FX100
- Audio Analyzer Speaker Impedance Module FX-SIP (includes power amplifier)
- Measurement Microphone M2010
- Premiere Speaker Test Software
High Volume and Automated Testing of Speakers > 30W
- FLEXUS FX100 Audio Analyzer
- Speaker Impedance Module FX-SIH (requires external power amplifier)
- Measurement Microphone M2010
- Premiere Speaker Test Software
Manual Testing of Speakers < 30W
- FLEXUS FX100 Audio Analyzer
- Speaker Impedance Module FX-SIP (includes power amplifier)
- Measurement Microphone M2010
- Standard Speaker Test Software
Manual Testing of Speakers > 30W
- FLEXUS FX100 Audio Analyzer
- Speaker Impedance Module FX-SIH (requires external power amplifier)
- Measurement Microphone M2010
- Standard Speaker Test Software
Directivity Measurement of Lightweight Speakers and Devices
- FLEXUS FX100 Audio Analyzer
- Measurement Microphone M2010
- Turntable TT01
- Loudspeaker Directivity Option
Accessories
- Input Switcher Module FX-IS
- Turntable TT01
- Loudspeaker Directivity Option
- Environmental Sensor
- Class 1 Sound Calibrator 94/114 dB
- Auxiliary IO connection board
- Stack Light (red/orange/green)
- Footswitch
- FX100 Rack Mounting
Microphone Test
The turnkey microphone test solution provides an extensive test with short test cycle times. The solution is provided by the FX100 and operated via the RT-MicFX software. It provides a comprehensive set of measurements for the quality control of microphone components or assembled products, such as mobile phone microphones, headsets or pro audio microphones.
- For R&D and automated production lines
- Accurate and repeatable measurements
- Typical test cycle time <2 seconds
Overview
Key-Parameters
- Accurate and repeatable measurements
- Turnkey solution with flexible user interface in selectable languages English, Chinese, Japanese, Korean and German
- Short test cycle time, typically < 2 seconds
- Dedicated for R&D and automated production lines
- Scalable test architecture with dual channel measurements and optional switchers for sequential testing of one or more microphones
- Built-in Phantom power and ICP supply
Turn-key Solution
The design of the FX100 Audio Analyzer follows the key requirements for production testing: Flexibility, speed and ease of integration.
Flexibility
The scalable hardware concept allows customization of the FX100 hardware according to the individual requirements. Plug-in options offer full flexibility such as additional measuring channels, input and output switchers or impedance measurement modules. The audio analyzer grows with the application for manually-operated and fully-automated production lines.
Measurement Speed
Fast GlideSweeps obtain all relevant measurement results from one short stimulus, typically less than a second. The FX100 has been optimized for factory noise immunity and high volume production. The sequence mode provides automated measurement of customized test sequences including Pass/Fail decision.
Ease of Integration
The FX100 Audio Analyzer bridges the demands of QC engineering for using the same instrument in R&D, sample inspection and on the production floor. Individual application projects may be transferred around the globe for fast setup.
Automation
All measurement data may be logged for detailed manufacturing control. The built-in digital I/O interface connects to peripheral devices, such as a foot switch or a stack light.
Microphone Test Software
Measurement Functions
- Frequency response in-axis, off-axis
- Sensitivity
- Distortion
- Signal-to-noise ratio S/N
- Detection of audible imperfections
- Directivity, polar plot
- Polarity
Polar Plot
The polar plot analysis with the NTi Audio precision turntable complements the microphone measurement system to an all-in-one solution. The polar diagram displays the directional characteristic related to the measurement frequency of the microphone. For detailed analysis, the measurement angles can be set to a resolution of less than 1°.
The high-speed FX100 Audio Analyzer generates a series of fast sweep signals, covering the complete audio band of interest, and the turntable TT01 rotates the microphone to the configured angles between the sweeps. The measurement time can be halved by choosing the 180° mode, which mirrors the polar image. The polar plot graphics can be adjusted after the completed measurement, thus the microphone test system offers full flexibility for post-processing.
Test Setups
Setup with 1x Microphone
This setup verifies single microphones in a basic test environment. The sound source is equalized for a flat frequency response using a reference measurement microphone.
Procedure:
- Calibrate and equalize the sound source by using the reference measurement microphone M2010
- Start microphone measurements with the equalized sound source
Setup with 1x Microphone and 1x Reference Microphone
This setup verifies single microphones in a test environment with equalized sound source and reference microphone. The measurement provides results relative to the reference measurement microphone, thus the results are immune to any changes in the environment such as temperature or humidity.
Procedure:
- Calibrate and equalize the sound source by using the permanently-installed NTi Audio reference microphone M2010
- Start microphone measurements with the equalized sound source and the reference microphone M2010
Setup for Multiple Microphones with Switcher
This setup verifies several single microphones in a sequence.
Procedure:
- Calibrate and equalize the sound source by using the NTi Audio reference measurement microphone M2010
- Start microphone measurement sequence with IS-1002 audio input switcher
Turntable Setup for Polar Pattern Measurement
This setup records the polar plot of a single microphone on a turntable in a test stand with equalized speaker.
Procedure:
- Calibrate the SPL of the sound source by using the NTi Audio reference measurement microphone M2010
- Start automated polar pattern measurement with equalized sound source
Configuration
Microphone Test System
contains
- Flexus FX100 Audio Analyzer
- Measurement Microphone M2010
- RT-Microphone for Flexus Software
optional as required
- Directivity Option
- MEMS Mic Interface Box
- Environmental Sensor
- Precision Microphone Calibrator 94/114 dB
- Auxiliary IO connection board
- Stack Light (red/orange/green)
- Footswitch
- Rack Mount Set
Downloads
- Information
- Use Case
- User Downloads
