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SJZ9144-1987 English PDF

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SJZ9144-1987: IEC reference coupler for the measurement of hearing aids using earphones coupled to the ear by means of ear inserts
Status: Obsolete
Standard IDContents [version]USDSTEP2[PDF] delivered inStandard Title (Description)StatusPDF
SJ/Z 9144-1987English199 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 Obsolete SJ/Z 9144-1987

PDF similar to SJZ9144-1987


Standard similar to SJZ9144-1987

GB/T 12631   SJ 20434A   

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 5,569
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.

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