ELECTROACOUSTICS - AUDIOMETRIC EQUIPMENT - PART 5: INSTRUMENTS FOR THE MEASUREMENT OF AURAL ACOUSTIC IMPEDANCE/ADMITTANCE
International Electrotechnical Committee
FOREWORD
INTRODUCTION
1 Scope
2 Normative references
3 Terms and definitions
4 Requirements for specific instruments
5 General specifications
5.1 Measuring system
5.2 Pneumatic system
5.3 Acoustic reflex activating stimulus system
6 Demonstration of conformity with specifications
6.1 General
6.2 Impedance/admittance measuring system
6.3 Probe signal
6.4 Pneumatic system
6.5 Acoustic reflex activating stimulus signals
6.6 Maximum permitted expanded uncertainty of measurements
7 Calibration cavities
7.1 General
7.2 Dimensions of calibration cavities
7.3 Material of calibration cavity walls
7.4 Connection of probe to a calibration cavity
8 General requirements
8.1 Marking
8.2 Instruction manual
8.3 Safety requirements
8.4 Warm-up time
8.5 Supply variation and environmental conditions
8.6 Unwanted acoustic signals and radiation
9 Symbols, forms and formats for acoustic impedance/admittance
data
9.1 Symbols for indicating measured quantities
9.2 Tympanogram format
9.3 Acoustic reflex test format
9.4 Eustachian tube function test format
10 Additional characteristics to be specified by the manufacturer
10.1 Aural impedance/admittance measurement system
10.2 Pneumatic system
10.3 Acoustic reflex activating stimulus system
10.4 Analogue electrical output
Annex A (informative) Routine calibration
Annex B (informative) Units and terms
Annex C (informative) Overall temporal characteristics
Bibliography
Applies to instruments designed primarily for the measurement of acoustic impedance/admittance in the human external acoustic meatus using a stated probe tone. It is recognized that other probe signals may also be used. It defines the characteristics to be specified by the manufacturer, lays down performance specifications for three types of instruments and specifies the facilities to be provided on these types.
| Document Type | Standard |
| Status | Current |
| Publisher | International Electrotechnical Committee |
| Committee | TC 29 |
