Superseded
Standard
Historical
IEC 60118-4:1981
Methods of measurement of electro-acoustical characteristis of hearing aids. Part 4: Magnetic field strength in audio-frequency induction loops for hearing aid purposes
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Summary
Applies to audio-frequency induction loop systems producing an alternating magnetic field and intended to provide an input signal for hearing aids operating with an induction pick-up coil. Specifies a standard value of magnetic field strength in audio-frequency induction loops for hearing aid purposes, such as will give an adequate signal-to-noise ratio without overloading the hearing aid.
Technical characteristics
| Publisher | International Electrotechnical Commission (IEC) |
| Publication Date | 01/01/1981 |
| Release Date | 01/01/1981 |
| Cancellation Date | 10/27/2006 |
| Edition | 1 |
| Page Count | 9 |
| EAN | --- |
| ISBN | --- |
| Weight (in grams) | --- |
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