1. [1] Yamamoto, A., "Micro-pressure wave radiated from tunnel exit," presented at the Spring Meeting of the Physical Society of Japan, p.137, 1977 (in Japanese).
2. [2] Ozawa, S., Uchida, T. and Maeda, T., "Reduction of micro-pressure wave radiated from tunnel exit by hood at tunnel entrance," Quarterly Report of RTRI, Vol.19, No.2, pp.77-83, 1978.
3. [3] Ozawa, S., "Studies of micro-pressure wave radiated from a tunnel exit," Railway Technical Research Report, No.1121, 1979 (in Japanese).
4. [4] Ozawa, S., Maeda, T. Matsumura, T. and Uchida, K., "Effect of ballast on pressure wave propagating through tunnel," presented at the International Conference on Speedup Technology for Railway and Maglev Vehicles, pp.299-304, 1993.
5. [5] Ozawa, S., Murata, K. and Maeda, T., "Effect of ballasted track on distortion of pressure wave in tunnel and emission of micro-pressure wave," presented at the 9th International Symposium on Aerodynamics & Ventilation of Vehicle Tunnels, pp.935-947, 1997.