Full-process sound detection technology, standard formulation and industrialization based on building intercom system
Accurate voice detection in the building intercom system sets international standards and ensures safety.
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Key innovations
This project originally proposed a full-process acoustic signal inspection plan for the building intercom system, solved the problem of subjective and objective inconsistency in voice evaluation, established a call transmission/calculation model, significantly improved the voice quality and structural design of the product, and enabled my country to lead the formulation of international standards.
Potential economic benefits
Promote product upgrades, increase the industry's output value by more than 3 billion yuan, add new testing revenue by 60 million yuan, and instrument sales by more than 6 million yuan, helping China products dominate the international market.
Potential climate benefits
Improve product reliability and life, and reduce production and replacement energy consumption. Optimize design to reduce material waste, promote efficient use of resources, and indirectly reduce carbon emissions throughout the life cycle.
Solution supplier
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Ministry of Public Security third Institute
The Third Research Institute of the Ministry of Public Security focuses on cybersecurity and police science and technology innovation to build a solid technical barrier for national security and social stability.
Shanghai，China
Solution details
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Science and technology field
This project belongs to the field of safety technology prevention, involving the research of key testing technologies for building intercom systems, the formulation of a series of industry standards by the Ministry of Public Security, and the development and promotion and application of special testing instruments. -
Main technological innovation contents and characteristics
- Major innovations in key testing technologies 1: This project, combined with the formulation and revision of a series of industry standards by the Ministry of Public Security, originally proposes a complete complete sound signal inspection plan for the entire process of building intercom systems to solve the problem of subjective and objective voice quality evaluation in my country's original implementation standards. The problem of inconsistency has become the core technical requirements and test methods of GA/T 72-2005 and GA/T 678-2007 standards. The project adheres to the principle of black box detection, and through a large number of theoretical derivation and practical verification, it establishes a test model and calculation model for the interphone transmission characteristics of the building for the first time, realizing a comprehensive evaluation of the system's voice transmission quality, and enabling the product to be designed in terms of call quality and structure. Rationality has been significantly improved, promoting product upgrades, and greatly promoting technological progress and structural upgrades in the entire industry. Based on this, my country was finally able to obtain the right to formulate four international standards for the full range of IEC62820 floor intercom in 2012, laying the foundation for China products to enter and dominate the international market. According to the voting results of P member states of IEC TC79, this testing technology and standard are significantly superior to the current EU standards and are at the international leading level. An international invention patent has been applied for (patent application number PCT/CN2014/075632).
- Major innovations in key measurement technologies 2: Aiming at the world's technical problem that the measurement accuracy is difficult to improve in two-way free sound field measurement, the project adopts secondary processing technology after fast discrete Fourier series transformation to achieve the measurement accuracy of acoustic signal distortion to ≤2% level. This technology has been applied in the development of special testing equipment, reaching the international advanced level, and obtaining a China invention patent (Patent No. ZL2008 1 0203913.8).
- Innovation in acoustic test point control technology: Aiming at the technical problem of how to ensure the stability, reproducibility and accuracy of acoustic signals in two-way free sound field measurement, the project adopts synchronous centering technology and positioning head frame scheme to enable various types of shell structure products, the receiving and sound transmission measurement positions are constant. This technology is applied in special testing equipment, and there are no similar products at home and abroad.
- Innovation and industrialization of special testing instruments: The project combines testing standards and patented technology, and uses simulation technology and space field measurement technology to develop special testing instruments. It has passed the national metrology certification and the Ministry of Public Security's Application Innovation Plan project review and finalization as a standard. Testing instruments are industrialized. This instrument is not only used for testing Louyu intercom products in third-party laboratories of national quality inspection agencies, but also goes out of the laboratory and is marketed at home and abroad. The instrument has obtained a China utility model patent (Patent No. ZL2008 2 0150616.7). According to the level search report of the Shanghai Institute of Science and Technology Information, it is innovative and advanced, reaching the international advanced level.
- Application promotion situation:
The technical achievements of this project have a high degree of transformation, and the testing plan has been applied in the standards, issued and implemented for nearly 8 years. As the highest standard in my country, it has been applied to the country's industry management of domestic and foreign building-talkies and smart home products sold in China. During the management, the annual output value of products designed and manufactured according to this achievement exceeds 3 billion yuan, with significant social benefits. It also brings good economic benefits to testing services, and the related testing revenue has increased by more than 60 million yuan.
Special testing instruments have been successfully sold to national and provincial quality inspection agencies, and professional production enterprises at home and abroad. They have been widely used as professional testing equipment. Product sales revenue exceeds 6 million yuan, achieving good economic benefits.
Due to the results of this project, my country has obtained the right to formulate international standards, which has greatly promoted the pace of China's building intercom system products entering the world, and has produced incalculable economic and social benefits. In addition, the project results have been expanded to many other social welfare fields such as urban emergency call systems, public health care, and financial services.
Last updated
07:09:57, Nov 05, 2025
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