1. Sound Traffic Environment Inc., Koya-Amidaji-Machi 10, Chuo-Ku, Kumamoto 860-0033, Japan
2. Shimane University, Nishikawatsu-Cho 1060, Matsue 690-8504, Japan
3. Defense Facilities Environment Improvement Association, Shiba 3-41-8, Minato-Ku, Tokyo 105-0014, Japan
4. Kanagawa Environmental Research Center, Shinomiya 1-3-39, Hiratsuka 254-0014, Japan
5. Kumamoto University, Kurokami 2-39-1, Chuo-Ku, Kumamoto 860-8555, Japan
6. Hokkai Gakuen University, Nishi 11-1-1, Minami 26, Chuo-Ku, Sapporo 064-0926, Japan
7. Airport Environment Improvement Foundation, Ryuuen Building, 1-3-1, Shiba-Koen, Minato-Ku, Tokyo 105-0011, Japan