Sanatorium area, senior villa area and senior hotel area, 50dB during the day and 40dB at night; Cultural and educational institutions are the main areas, 55dB during the day and 45dB at night; Residential injection commercial and industrial mixed area, 60dB during the day and 50dB at night; Industrial zone, 65dB during the day and 55dB at night; Road traffic trunk roads, inland waterways, urban railways, primary and secondary trunk lines.