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Meta Hearing Technology (MHT)

Optional Modules for the KLIPPEL QC Framework

Features and Benefits

  • Improves standard Rub & Buzz analysis
  • Defect detection beyond human hearing
  • Extends analysis bandwidth for defect symptoms
  • Attenuates high-order harmonic distortion
  • Unmask subtle defect symptoms

Some defects in loudspeakers such as loose particles in the gap produce random symptoms, which may be not audible during end-of-line testing. Other defects such as voice coil rubbing become worse after some time and may be detected when the transducer is mounted in the car audio system or in any other final application. To avoid shipping a defective unit defects should be detected in manufac-turing even if they are inaudible for a human tester.

Meta Hearing Technology
This example shows a loose particle producing an inaudible click which is completely masked by the regular distortion generated by accepted motor and suspension nonlinearity. These defects can be detected by MHT before getting worse, becoming audible and causing field rejects.

Specification

Requirements

Software
• QC Standard System or QC Programmable System

Accessories
• Microphone

Related Information

Other Modules of the QC System

General Features of the QC System

Patents

USA: 7,221,167B2

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