SJZ9144-1987 English PDF

US$199.00 · In stock
Delivery: <= 2 days. True-PDF full-copy in English will be manually translated and delivered via email.
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Status: Obsolete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 ID	USD	BUY PDF	Lead-Days	Standard Title (Description)	Status
SJ/Z 9144-1987	199	Add to Cart	2 days	IEC reference coupler for the measurement of hearing aids using earphones coupled to the ear by means of ear inserts	Obsolete

Similar standards

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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