Beijing Danielihua Technology Development Co., Ltd. is a participating unit of the National Acoustic Code. It is a professional audio company specializing in acoustic research, sound field sound reinforcement clarity research, sound reinforcement system research and development, and technical promotion and sales. For more than ten years, it has been adhering to the scientific development concept guided by cutting-edge technology, with duoxiang domestic and foreign patents. Using the same patented technology, the brand PROSO is registered and produced in China. We are a company that focuses on science and technology. We have always attached great importance to the interests of the owners, and have always put how to improve the clarity of sound field reinforcement in a prominent position! In the audio industry, we use our own unique and advanced high-definition sound reinforcement technology to solve the long-standing problem in the industry that "the built sound environment controls the sound reinforcement clarity effect", and has fundamentally achieved "HD sound reinforcement technology controls the sound field sound reinforcement clarity" "Degree effect", has won a number of major invention patents at home and abroad. One of them, the high-definition line source speaker technology, was applied in more than ten Olympic venues and Olympic cultural squares during the 2008 Beijing Olympic Games.

It is in the sound reinforcement reconstruction project of the Yingdong Swimming Pool of the Beijing Olympic Sports Center. Even if the reverberation time of the competition hall of the swimming pool is 4 seconds longer, in this harsh sound field environment, the sound reinforcement after the sound reinforcement is transformed. The sound intelligibility effect is still very high. The average value of STI PA measurement reaches 0.69 STI, which exceeds 50% of the Olympic Organizing Committee's requirement for sound reinforcement in stadiums. At the same time, it has been praised and reported by CCTV and other media. By the 29th Olympic Games Organizing Committee Technology Department Venue Equipment Division; China Radio, Television, Radio, Television and Film Design and Research Institute; China Electronics Technology Group Corporation Third Research Institute; China Construction Industry Association Intelligent Building Professional Committee; Ministry of Construction Science and Technology Commission Intelligent Building Technology Development Center; China Construction Engineering Quality Supervision and Inspection Center, Beijing Machinery Industry Automation Research Institute; Naval Engineering Design and Research Institute and other units, jointly conducted a serious discussion and practical inspection of the project, and measured it.

After reviewing the materials of the previous Olympic Games venues, it is believed that among all the competition venues of the recent three Olympic Games (Athens, Sydney, Atlanta), the Beijing Olympics Yingdong Swimming Pool has the highest sound reinforcement clarity. Therefore, experts in the sound reinforcement industry unanimously rated the sound reinforcement system of the Yingdong Swimming Pool of the Olympic Sports Center as a "high-quality sound reinforcement system project". And they agreed that our "professional sound reinforcement high-definition line source speaker technology has reached the international advanced level and is worthy of promotion". The successful application of this technology has broken through the forbidden area of ​​high-definition sound reinforcement in the environment of insufficient sound construction or harsh sound field, and is at the advanced level in the world electro-acoustic industry. Such an evaluation is also the only professional sound reinforcement product in the field of professional sound reinforcement among the newly built, renovated and expanded venues for the 2008 Olympic Games.