Abstract
Impact noise due to trains passing over rail joints causes a serious problem at the wayside of railway. Therefore, an effective countermeasure against the noise generated by rail joint is required. New equipment for rail joint named "Noise Insulator for Rail Joint" has been developed. The insulator consists of bonded small inorganic particles in which glass wool and polyvinyl chloride sheet mixed with the steel powders are packed. The insulator is installed at the nearby rail joint and absorbs and insulates a part of noise radiated from rail joint. Endurance test on the material of bonded inorganic particles of the insulator and noise measurement of train pass-by at commercial line were carried out to evaluate the practicality of the equipment. Consequently, the insulator showed efficient durability, and noise reduction of 1〜2dB in noise level was achieved at the trackside.
