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