I.S. EN 60118-8:2006
Current
The latest, up-to-date edition.
ELECTROACOUSTICS - HEARING AIDS - PART 8: METHODS OF MEASUREMENT OF PERFORMANCE CHARACTERISTICS OF HEARING AIDS UNDER SIMULATED IN SITU WORKING CONDITIONS
Hardcopy , PDF
English
01-01-2006
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FOREWORD
INTRODUCTION
1 Scope
2 Normative references
3 Terms and definitions
4 Limitations
5 Test equipment
5.1 Acoustical requirements for the test space
5.2 Sound source
5.3 Manikin
5.4 Ear simulator
5.5 Ear insert simulator
5.6 Equipment for the measurement of occluded-ear simulator
sound pressure level
5.7 Equipment for automatic sweep frequency recording
5.8 Equipment for calibration of free field sound pressure level
6 Test conditions
6.1 Choice of test point
6.2 Ambient conditions
6.3 Manikin
6.4 Location of the hearing aid
6.5 Normal operating conditions for the hearing aid
7 Measurements
7.1 General
7.2 Adjustment of the reference input sound pressure level
7.3 Manikin frequency response (MFR)
7.4 Full-on simulated insertion gain measured by the
constant reference input SPL method
7.5 Full-on simulated insertion gain measured by the
constant ear simulator SPL method
7.6 Directional characteristics
7.7 Simulated in situ OSPL90 measurements
7.8 Simplified method to measure simulated in situ and
insertion gain response
8 Frequency response recording charts
9 Maximum permitted expanded uncertainty of measurements
Annex A (normative) Free-field to hearing-aid-microphone
transformation
Annex B (normative) Manikin unoccluded-ear gain (open ear
response)
Annex C (informative) General requirements for a manikin
Annex ZA (normative) Normative references to international
publications with their corresponding European
publications
Bibliography
Specifies methods for a test which simulates the acoustical effects of a median adult wearer on the performance of a hearing aid.
| DevelopmentNote |
For CENELEC adoptions of IEC publications, please check www.iec.ch to be sure that you have any corrigenda that may apply. (01/2017)
|
| DocumentType |
Standard
|
| Pages |
78
|
| PublisherName |
National Standards Authority of Ireland
|
| Status |
Current
|
| Standards | Relationship |
| NF EN 60118-8 : 2006 | Identical |
| EN 60118-8:2005 | Identical |
| BS EN 60118-8:2005 | Identical |
| SN EN 60118-8 : 2005 | Identical |
| IEC 60118-8:2005 | Identical |
| DIN EN 60118-8:2006-08 | Identical |
| NBN EN 60118-8 : 2006 | Identical |
| UNE-EN 60118-8:2006 | Identical |
| EN 60118-0:2015 | Electroacoustics - Hearing aids - Part 0: Measurement of the performance characteristics of hearing aids |
| IEC 60118-7:2005 | Electroacoustics - Hearing aids - Part 7: Measurement of the performance characteristics of hearing aids for production, supply and delivery quality assurance purposes |
| HD 443 : 200S1 | OCCLUDED-EAR SIMULATOR FOR THE MEASUREMENT OF EARPHONES COUPLED TO THE EAR BY EAR INSERTS |
| IEC 60711:1981 | Occluded-ear simulator for the measurement of earphones coupled to the ear by ear inserts |
| IEC 60263:1982 | Scales and sizes for plotting frequency characteristics and polar diagrams |
| IEC 60118-0:2015 | Electroacoustics - Hearing aids - Part 0: Measurement of the performance characteristics of hearing aids |
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