SJZ9144-1987 PDF English
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| Std ID | Version | USD | Buy | Deliver [PDF] in | Title (Description) |
| SJ/Z 9144-1987 | English | 199 | Add to Cart | 2 days [Need to translate] | IEC reference coupler for the measurement of hearing aids using earphones coupled to the ear by means of ear inserts |
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Basic data
| Standard ID | SJ/Z 9144-1987 (SJ/Z9144-1987) |
| Description (Translated English) | IEC reference coupler for the measurement of hearing aids using earphones coupled to the ear by means of ear inserts |
| Sector / Industry | Electronics Industry Standard |
| Classification of Chinese Standard | L31 |
| Word Count Estimation | 5,542 |
| Date of Implementation | 1/6/1988 |
| Adopted Standard | IEC 126-1973, IDT |
| Regulation (derived from) | Industry-Science (2010) No. 77 |
| Summary | The purpose of this Recommendation is to draw the one with a specific sound headphones Holds disrupt the coupling cavity, it can be in the frequency range 200 ~ 5000Hz, the determination of the physical properties of air conduction hearing aids headset, the headset is by ear as ear molds or similar devices coupled to the human ear. Coupled cavity is earlier than 2cm ^ 3 coupling cavity development. With this coupling cavity does not give the actual performance of the hearing aid in each person obtained. However, IEC recommend it as an easy way to exchange data and physical characteristics of the hearing aid. |
