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Superseded
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BS EN 60118-15 ED.1 - ELECTROACOUSTICS - PART 15: HEARING AIDS - METHODS FOR CHARACTERISING SIGNAL PROCESSING IN HEARING AIDS
Hardcopy , PDF
31-05-2012
English
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FOREWORD
1 Scope
2 Normative references
3 Terms and definitions
4 Limitations
5 Setup
5.1 System overview
5.2 Estimated Insertion Gain
5.3 Coupler gain
6 Test equipment
6.1 Acoustical requirements
6.2 Test signal
6.2.1 Specification
6.2.2 Shaping of the test signal for determining the EIG
6.3 Earphone coupler and attachments
6.3.1 Estimated Insertion Gain
6.3.2 Coupler gain
7 Test conditions
7.1 Programming of hearing aid
7.2 End user settings for programming
7.3 Vent selection for programming
7.4 Directionality
7.5 Audiograms
7.6 Hearing aid features
8 Measurements and analysis
8.1 Measurements
8.1.1 General
8.1.2 Estimated Insertion Gain
8.1.3 2cc coupler gain (optional)
8.2 Analysis
8.2.1 General
8.2.2 Compensating for hearing aid processing delay
8.2.3 Correction for use of 2cc coupler for EIG
determination
8.2.4 Calculation of EIG for the LTASS of the test signal
8.2.5 Calculation of 2cc coupler gain for the LTASS of the
test signal
8.2.6 Short-term percentile sound pressure level gain
8.2.7 Calculation of EIG for a given percentile sound
pressure level of the test signal
8.2.8 Calculation of 2cc coupler gain for a given percentile
sound pressure level of the test signal
9 Data presentation
9.1 LTASS gain
9.2 Speech gain
9.3 Interpretation of gain views
9.3.1 LTASS gain view
9.3.2 Speech gain view
9.4 Mandatory data
Annex A (informative) International Speech Test Signal (ISTS)
A.1 Overall specification of ISTS
A.2 Design of the ISTS
A.2.1 Speech recordings
A.2.2 Segmentation of recordings
A.2.3 Mixture of segments
A.3 Analysis of the ISTS
Annex B (informative) Calculation of percentile levels
Bibliography
BS EN 60118-15 ED.1
| Committee |
EPL/29
|
| DocumentType |
Draft
|
| Pages |
36
|
| PublisherName |
British Standards Institution
|
| Status |
Superseded
|
| SupersededBy |
| IEC 60318-4:2010 | Electroacoustics - Simulators of human head and ear - Part 4: Occluded-ear simulator for the measurement of earphones coupled to the ear by means of ear inserts |
| 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 |
| IEC 60711:1981 | Occluded-ear simulator for the measurement of earphones coupled to the ear by ear inserts |
| IEC 60318-5:2006 | Electroacoustics - Simulators of human head and ear - Part 5: 2 cm<sup>3</sup> coupler for the measurement of hearing aids and earphones coupled to the ear by means of ear inserts |
| IEC 61669:2015 | Electroacoustics - Measurement of real-ear acoustical performance characteristics of hearing aids |
| IEC 60118-8:2005 | Electroacoustics - Hearing aids - Part 8: Methods of measurement of performance characteristics of hearing aids under simulated [<i>in situ</i>] working conditions |
| ANSI/ASA S3.22:2014 | SPECIFICATION OF HEARING AID CHARACTERISTICS |
| IEC 61260:1995 | Electroacoustics - Octave-band and fractional-octave-band filters |
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