Abstract: Electromechanical vibration transducers are embedded in a pad, and a mat on which a newborn baby is placed is stacked on the pad. A graphic equalizer is arranged to correct the frequency characteristics of a sound signal generated by a sound signal generator to characteristics close to the original frequency characteristics even if sounds are reflected to interfere with each other in an incubator. Comfortable vibrations can be applied to the newborn baby. In addition, sounds having frequency characteristics close to the original frequency characteristics can be played for the newborn baby. The newborn baby therefore can feel at ease, and at the same time bedsores, night terrors, and the like can be prevented. Maintenance cost is also low.