BS EN 60118-8:2005
Current
The latest, up-to-date edition.
Electroacoustics. Hearing aids Methods of measurement of performance characteritics of hearing aids under simulated in situ working conditions
Hardcopy , PDF
English
14-02-2006
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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 OSPL 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.
| Committee |
EPL/29
|
| DevelopmentNote |
Supersedes BS 6083-8(1985). (02/2006) Supersedes 00/203402 DC. (03/2006)
|
| DocumentType |
Standard
|
| Pages |
36
|
| PublisherName |
British Standards Institution
|
| Status |
Current
|
| Supersedes |
Describes methods for a test which simulates the acoustical effects of a median adult wearer on the performance of a hearing aid. Establishes certain guidelines for simulated in situ measurements of hearing aids; it describes a simplified method for simulated in situ measurements of hearing aids and a description for determination of the directivity index (DI) of directional microphones in hearing aids in the horizontal plane. In addition this second edition now specifies tolerances. Conformance to the specifications in this International Standard is demonstrated only when the result of a measurement, extended by the actual expanded uncertainty of measurement of the testing laboratory, lies fully within the tolerances specified in this International Standard extended by the values for Umax
| Standards | Relationship |
| EN 60118-8:2005 | Identical |
| I.S. EN 60118-8:2006 | 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 |
| SN EN 60118-8 : 2005 | Identical |
| NF 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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