waves are everywhere. Invisible, some will collide, we graze, others through us, and we absorb a portion of their energy, but none of us get around. The skin book without possibility of escape and no closure to the sensations of space where it is located. Electromagnetic waves existed since the birth of the universe, theoretically initiated by the Big Bang . These rays are photons or packets of energy that travels and spreads in all directions as a regular or repetitive waves in space. They interact with our organization. According to their frequency and intensity, they inform, excite, inflame our cells.
We distinguish our bodies and our environment mainly by our sense organs. Our overall sensitivity is the medium through which we develop the re-familiarized and knowledge essential to our evolution . It consists of:
- passive cutaneous sensitivity , including touch, pressure, vibration and heat flux;
- haptic sensitivity, this result movement exploration assets hand coming into contact with objects;
- proprioception or the perception of body movements and positions in space;
- téléception or perception of remote sources via sight, smell and hearing;
- chemoception or the perception of taste, smell and other mucous membranes;
- Labyrinthism , or the perception of position, balance and movement of the head;
- noniception , or the perception of pain that tells our brain that something unusual is happening, threatening that the entire boundary is crossed and self-prompting the withdrawal, the establishment of a strategy of defense and protection of the organism;
- hyper-perception or intense world syndrome as found in cases of autism and other states natural, induced or pathological.
There are three types of gradations of these electromagnetic waves according to the number of waves that travel in one second (Hz), and the like, depending on the amount of energy contained in photons (eV), and according to the wavelength (m). These gradations reveal a spectrum ranging from very low frequencies at very high frequencies. Form non-ionizing, that is to say that do not affect the electrical current in our body, hence the low frequencies increased by TLF, ELF, SLF, ULF, radio wave (Transportation, AM, Short, FM, TV, radar), infrared to visible light. As it stands ionizing, which reverses the electric charge of our body's exposure to the horrors and irreversible injury, going from the ultraviolet, X-ray, gamma ray. We know the devastation that extreme waves cause some health, but we do not know everything. The world remains to be seen, basically. The complexity of sound, it is due to vibrational modes matter. Example: the guitar string that vibrates, the drop that falls into the water and creates ripples, the floor creaking under our feet. Hearing and human communication operates on a limited range of frequencies from 20 to 20,000 Hz below 20 Hz, for us is silent, but not for the elephants can be perceived at several hundred kilometers. Ultrasounds are not very acute perceived by humans but are by dogs is well known. The speech is 100 Hz in humans, 250 Hz for women and children. The intensity of sound is expressed in decibels (dB). The perception threshold is 0 dB. A quiet place is a sound level of 30 dB, a normal environment (speech) to about 60 dB. The limit of harmfulness sounds is around 85-90 dB. The loud sound effects (amplified music, motorsports, industry) are between 90 and 120 dB. Beyond that, we talk about quality sounds: planes, rockets, explosions.
It may happen that pollute the airwaves . Another phenomenon, the echo is the repetition of a wave that bounced off a surface. The shock waves, abrupt transitions, non-progressive, apparently discontinuous and without intermediate may occur, for example, crossing the sound barrier. They nevertheless have the same continuity if observed closely. These waves are explosive and affect their wakes significant undulations. To distinguish sounds, because they also propagate in a disorderly manner, such an explosion, a crack like a sudden onset and local, but not necessarily induce transition.
In quantum mechanics, the structure of the atom itself can be explained by analogy with a system of standing waves. Nope, we are not really distinct from the rest of the universe, our difference is relatively significant, since we are part of the whole. We can be beneficial and harmful to our environment as the other elements are for us. There are only our abstractions that lead us to think we own. Thus, human beings, by their intrinsic vibration, also emit electromagnetic fields (ELF, SLF, ULF) averaged 37 ° C, a power of 173 watts of infrared frequency to 10 microns wavelength. The heart creates a magnetic field of 0.0005 mG while the brain produces a magnetic field of 10 mG -6. As the intensity of induced currents in the human body does not exceed that of currents produced normally in the brain, nervous system and heart tissues, the risk of electromagnetic exposure is supposé nul. Ainsi, exposées aux micro-ondes (entre 1 GHz à 300 GHz), fréquences supérieures à celles du corps humain (330 Hz à 30 KHz), les molécules d’eau s’agitent et du même coup, engendrent une élévation rapide de la température. Parce qu'il est fait principalement d'eau, sous les mêmes conditions, le corps humain cuirait! D’où il est possible de déduire les dommages innommables de la bombe atomique à Hiroshima . La CIPRNI (Commission Internationale de Protection contre les Rayonnements Non Ionisants) a fait des recommandations internationales concernant les acceptable limits of these emissions into the environment. Like the behavior of concern or flight animals before an earthquake, we sometimes foresee dangers so vague and unexplained . Also, sensitivity to electromagnetic fields issued is especially important if the body is great. Smaller animals that we are stronger.
The body, being a fairly good conductor, behaves like an antenna, an antenna, but not at all adapted to receive broadcasts. For example, the conductivity of the skin and body humain varient au cours d’une même journée selon le type de peau, le contenu des repas, la température extérieure, le stress, etc. Ainsi, d'une personne à une autre et d'une heure à une autre, on pourra obtenir des résultats différents. Par exemple, lorsque se tenant à proximité de l'antenne d’un poste récepteur radio ou télé, "l'antenne humaine" se couple parfois à l'antenne du récepteur, créant des courants à sa surface, et ces courants re-rayonne ensuite un champ électromagnétique qui va dépendre de la géométrie de ce conducteur et améliorer possiblement ou brouiller le signal. Mais les résultats seront toujours difficiles to reproduce in the open because the reception is unstable. The conductivity of the skin is the seed of various technology development initiatives based on the human body as an interface: MODEM HUMAN called Personal Area Network (PAN) at IBM and MIT share the idea of using the human body as bearer or electrical conductor to transmit information between two electronic devices through microchips under the skin, extending the transmission performance beyond clothing and allowing transactions applied to a string people; SKINTENNA called WBAN network of Queen's University of Belfast, a device worn around the body receives information from various bio-sensors traveling on the surface of the skin, designed to provide information on the health of a patient, but opened the door to development of all technologies brought near the body and new ethical considerations s.
Talks, we are facing so many movements, crawling, living on the edge of our skin ... but we, that past?
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