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 China 'GB/T 25498.5-2017 ' standard english version:

 

NATIONAL STANDARD OF THE PEOPLE'S REPUBLIC OF CHINA

GB/T 25498.5-2017

Electroacoustics—Simulators of human head and ear—Part 5:2 cm3 coupler for the measurement of hearing aids and earphones coupled to the ear by means of ear inserts
电声学 人头模拟器和耳模拟器 第5部分:测量助听器和以插入方式与人耳耦合的耳机用2cm3声耦合器

Issued Date:2017-09-07   Implemented Date:2018-04-01
Issued by:   The Standardization Administration of the People's Republic of China
 

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GB Standard Code GB/T 25498.5-2017
Standard Category China National Standards
GB Standard English Title Electroacoustics—Simulators of human head and ear—Part 5:2 cm3 coupler for the measurement of hearing aids and earphones coupled to the ear by means of ear inserts
GB Standard Chinese Title 电声学 人头模拟器和耳模拟器 第5部分:测量助听器和以插入方式与人耳耦合的耳机用2cm3声耦合器
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