I.S. EN 60118-2:1997
Superseded
A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.
View Superseded by
HEARING AIDS - HEARING AIDS WITH AUTOMATIC GAIN CONTROL CIRCUITS
Hardcopy , PDF
25-08-2015
English
01-01-1997
For Harmonized Standards, check the EU site to confirm that the Standard is cited in the Official Journal.
Only cited Standards give presumption of conformance to New Approach Directives/Regulations.
Dates of withdrawal of national standards are available from NSAI.
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1 Scope
2 Object
3 Conditions
4 Explanation of terms
4.1 Automatic gain control (AGC)
4.2 Steady-state input/output graph
4.3 Lower AGC limit or AGC threshold
4.4 Compression ratio (between specified input
sound pressure level values)
4.5 Dynamic output characteristics
4.6 Attack time
4.7 Recovery time
4.8 AGC activated frequency response
4.9 Operating frequency range of the AGC
5 Steady-state input/output graph
5.1 Graph showing the relation between input sound
pressure level and output sound pressure level
5.2 Methods of measurement
6 Dynamic output characteristics
6.1 Characteristics to be measured
6.2 Methods of measurement
7 Non-linear distortion
7.1 Transients
7.2 Harmonic distortion
7.3 Intermodulation distortion
8 Effect on steady-state and dynamic performance with
respect to variation in battery or supply voltage
9 AGC activated frequency response of hearing aids
with a single channel AGC circuit in operation
using pure tone signals
Annexes
A (informative) Examples of measuring systems
ZA (normative( Normative references to international
publications with their corresponding European
publications
Gives uniform methods for specifying dynamic and static performance characteristics of hearing aids with automatic gain control circuits together with the relevant methods of measurement for these characteristics.
| DocumentType |
Standard
|
| Pages |
78
|
| PublisherName |
National Standards Authority of Ireland
|
| Status |
Superseded
|
| SupersededBy |
| Standards | Relationship |
| NF EN 60118-2 : 96 AMD 2 97 | Identical |
| SN EN 60118-2 : 1995 AMD 2 1997 | Identical |
| EN 60118-2:1995/A2:1997 | Identical |
| BS EN 60118-2:1996 | Identical |
| UNE-EN 60118-2:1997 | Identical |
| IEC 60118-2:1983 | Identical |
| NBN EN 60118-2 : 1996 AMD 1 1998 | Identical |
| DIN EN 60118-2:1998-04 | Identical |
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