为湿地鸟儿戴上“静音耳机”，双柳长江大桥“生态长廊”建成

Core Viewpoint - The construction of the Shuangliu Yangtze River Bridge includes a unique ecological sound barrier designed to protect the local bird population, specifically the heron family, while minimizing noise pollution from passing vehicles [1][17]. Group 1: Project Details - The sound barrier spans 400 meters in length, 34 meters in width, and 6.38 meters in height, designed to create a "silent" passage for vehicles [1][4]. - The barrier is made of a translucent acrylic material with a light transmittance of 78%, ensuring adequate lighting while preventing bird collisions through diffuse reflection [4]. - The construction process utilized a modular assembly approach, significantly reducing construction noise and achieving millimeter-level installation precision [4][17]. Group 2: Environmental Impact - Monitoring data indicates that the sound environment within the barrier area remains stable at 50-55 decibels during the day and 40-45 decibels at night, which aligns with the comfort zone for the heron family [9]. - The project has also led to the discovery of a community of wild soybeans, a nationally protected plant species, along the construction route [9]. - The project exemplifies a commitment to ecological priorities, with over 100 million yuan invested in ecological measures and a sound barrier accounting for 24.55% of the total project [17]. Group 3: Community and Wildlife Interaction - Environmental volunteers have observed positive interactions between local wildlife, such as the Yangtze River dolphins, and the construction site, indicating a harmonious coexistence [14]. - The project has transformed initial concerns into reassurance regarding the impact of human engineering on local ecosystems [14].