Abstract: Provision of a new communication device that uses pneumatronic waves as transmission medium, taking advantage of the characteristics of responsive materials such as ceramics. The space communication device contains a transmission means that generates pneumatronic waves vibration-modulated by letting electromagnetic waves carrying information signals act on wave-transferred inorganic materials, a receiving means that detects as information signals electromagnetic waves generated by the coming pneumatronic waves, which act on the said wave-transferred inorganic materials to vibration-demodulate such materials, and a differential transformation means that prevents the said electromagnetic waves from impeding receiving action.

Abstract: A radiation protection device for minimizing the deleterious effects of electromagnetic radiation, especially that from a cellular telephone is presented. The radiation protection device is preferably composed of a ceramic material. Upon affixing the radiation protection device to a cellular telephone or any suitable electronic device, the radiation protection device absorbs gravitational waves from the surrounding environment. The absorbed gravitational waves may be amplified within the radiation protection device. The radiation protection device may then emit the amplified gravitational waves to alter the electromagnetic radiation emitted from the cellular telephone.