1. Some acoustical source-observer problems;Redfearn;Phil. Mag.,1940
2. Reduction of industrial machine noise;Fehr,1951
3. Noise level reductions of barriers;Rettinger;Noise Control,1957
4. Noise reduction by screens;Maekawa;Mem. Fac. Eng., Kobe Univ.,1965
5. Noise reduction by screens of finite size;Maekawa;Mem. Fac. Eng., Kobe Univ.,1966