Popular mechanics

Popular Mechanics (en español: Mecánica Popular) es una revista estadounidense dedicada a temas de ciencia y tecnología. En la actualidad pertenece a Hearst Communications. También existió desde 1947 una edición para Latinoamérica y una edición recientemente formada para el sur de África. Hearing of microwave pulses by humans and animals: effects, mechanism, and thresholds James C Lin et al. Health Phys. 2007 Jun. Abstract The hearing of microwave pulses is a unique exception to the airborne or bone-conducted sound energy normally encountered in human auditory perception. The hearing apparatus commonly responds to airborne or bone-conducted acoustic or sound pressure waves in the audible frequency range. But the hearing of microwave pulses involves electromagnetic waves whose frequency ranges from hundreds of MHz to tens of GHz. Since electromagnetic waves (e.g., light) are seen but not heard, the report of auditory perception of microwave pulses was at once astonishing and intriguing. Moreover, it stood in sharp contrast to the responses associated with continuous-wave microwave radiation. Experimental and theoretical studies have shown that the microwave auditory phenomenon does not arise from an interaction of microwave pulses directly with the auditory nerves or neurons along the auditory neurophysiological pathways of the central nervous system. Instead, the microwave pulse, upon absorption b[...x]