The Standardization Administration of China has established a comprehensive testing standard for voice calls during emergency notifications as GB/T 45314-2025.
The ACQUA standard specification GB/T 45314 eCall has been developed and commercialized to implement the acoustic performance compliance verification tests and requirements for narrowband and wideband voice transmission based on GB/T 45314-2025 (Clause 5). All voice signals used in acoustic measurements are in Chinese. The ACQUA standard specification consists of a single ACQUA project, which includes the measurement and analysis of eCall systems capable of processing narrowband and wideband signals. This project has implemented testing and result analysis tools based on the requirements of GB/T 45314-2025 (Clause 5).
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basic information
Clause 5 of GB/T 45314-2025 has been commercialized as the ACQUA project. GB/T 45314-2025 is a national standard of the People's Republic of China that specifies tests and requirements for eCall call quality. Chinese voice signals are used. It includes background noise test signals. Testing of Listening Effort in a background noise environment (in accordance with ETSI TS 103 558) is optional. Measurements of packet-switched communication networks in compliance with ITU-T Recommendation P.1140 (July 2022) have also been implemented.
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Applications/Examples of results
Quality analysis, development, and optimization of voice calls using an in-vehicle emergency call system based on GB/T 45314-2025 Clause 5 (Vehicles - Performance requirements and test methods for hands-free calling and voice interaction).
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China eCall
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Company information
HEAD acoustics Japan Co., Ltd. has been active as a leading company in the fields of dummy head-related recording and playback systems, acoustic analysis based on human auditory characteristics, and communication measurement technology for over 25 years. HEAD acoustics has consistently been a pioneer in developing innovative technologies such as dummy head-related binaural technology, acoustic analysis related to human hearing, interactive sound simulation systems, and transmission path analysis. HEAD acoustics will continue to focus on research and development through collaboration with universities and other research institutions and participation in international research projects.