IEC 60645-6:2009

FOREWORD
INTRODUCTION
1 Scope
2 Normative references
3 Terms and definitions
4 Requirements for specific instruments
5 General specifications
  5.1 Acoustic stimulus system
      5.1.1 General requirements
      5.1.2 Stimulus types
      5.1.3 Stimulus frequency range
      5.1.4 Stimulus level
      5.1.5 Harmonic distortion
  5.2 Test quality assuring system
      5.2.1 General
      5.2.2 Test quality assurance
      5.2.3 Individual stimulus recordings
  5.3 Measuring system
      5.3.1 Units of measurement
      5.3.2 Measurement range
      5.3.3 Accuracy of measurement
      5.3.4 Frequency range
      5.3.5 Noise reduction
      5.3.6 Response detection
      5.3.7 Quality estimates
      5.3.8 Normative values
  5.4 Presentation of results
      5.4.1 General
      5.4.2 Primary results
      5.4.3 Secondary results
6 Demonstration of conformity with specifications
  6.1 General
  6.2 Probe signal
      6.2.1 Probe signal spectrum
      6.2.2 Probe signal level and harmonic distortion
  6.3 Maximum permitted expanded uncertainty of
      measurements U[max]
  6.4 Function of the complete system
7 General requirements
  7.1 Marking
  7.2 Instruction manual
  7.3 Safety requirements
  7.4 Immunity to power and radiofrequency fields
  7.5 Warm-up time
  7.6 Voltage supply variation and environmental conditions
      7.6.1 Mains operation
      7.6.2 Battery operation
      7.6.3 Environmental conditions
8 Additional characteristics to be specified by the
  manufacturer
9 Routine calibration
Bibliography

IEC 60645-6:2009 applies to instruments designed primarily for the measurement of otoacoustic emissions in the human external acoustic meatus evoked by acoustic probe pulses or tones. This standard defines the characteristics to be specified by the manufacturer, lays down performance specifications for two types of instruments and specifies the functions to be provided on these types. IEC 60645-6:2009 describes methods of test to be used for approval testing and guidance on methods for undertaking routine calibration. The purpose of IEC 60645-6:2009 is to ensure that measurements made under comparable test conditions with different instruments complying with the standard will be consistent. Instruments which provide a measurement function not specifically within the scope of the standard shall still comply with any relevant requirements. This standard is not intended to restrict development or incorporation of new features, nor to discourage innovative approaches.