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Sound, Noise, Vibration and….Circulation October 23, 2006

Posted by healthyself in Aesthetics, Amplified Signals, Amplitude, Art, Bioeffects, Biological Effects, Body Temperature, Buzzing, Children's health, Circulation, Color, Computer Rooms, Decision Making, Ear, Electrical Components, Electrical Pulses, Electrical Surges, Electrical Wiring, Electromagnetic Field, Electromagnetic Spectrum, Electromagnetic waves, Electrosensitivity, Electrosmog, ELF, EMF Research, EMF's, Environment, Exposure, Frequencies, Health related, Hearing, Interdisciplinary, Lifestyle, Long Term Health Risks, Men's Health, Parenting, Pulses, Radio Frequency Radiation, Radio Waves, Research Needed, Risk Factor, Safe Levels, School administrators, Schools, Sound, Who is Affected?, Women's Health, Workplace.
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  "In art processes, noise can be caused by vibration, forging,

woodworking and other machinery, pneumatic tools, exhaust fans,

etc.  In particular, old or improperly maintained equipment tends

to create more noise.  In general, if someone has to raise their

voice to be heard by another person one to two feet away, then

the noise level is too high, especially if it is a steady noise....
Some studies have shown that woodworking teachers have a higher rate
of hearing loss than other teachers."

     "Sound intensity is measured in decibels (dB), on a

logarithmic scale.  In this scale, 90 dB is ten times more

intense than 80 dB, and 110 dB is ten times more intense than 100

dB.  The sound intensity doubles for every increase of 3 dB,

showing that small increases in decibel levels can involve large

increases in sound intensity.  Table 7-1 shows the decibel levels

of common sounds.

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Table 7-1   Approximate Sound Levels of Common Noise Sources

Source                                       Sound Level (dB)

Jet engine                                      160

Loud amplified music                            118

Planer                                          115

Portable grinder                                110

Circular saw                                    105

Sander, foundry                                  95

Classroom teaching voice at 3 feet               75

Normal speaking voice at 3 feet

"Pneumatic and vibrating equipment such as chain saws can

also create problems due to vibration.  Raynaud's phenomenon,

which is also called "white fingers" or "dead fingers", affects

the circulation of the fingers, causing them to turn white from

lack of blood and to lose sensation.  Vibration can cause this,

particularly with simultaneous exposure to cold, for example,

from the air blast of pneumatic tools.  This condition is

initially temporary, but can spread to the whole hand and cause

permanent damage."

http://www.uic.edu/sph/glakes/harts1/HARTS_library/school7.txt

What is the Electromagnetic Spectrum? September 21, 2006

Posted by healthyself in Blogroll, Cell phone safety, Color, Definitions, Electromagnetic Field, Electromagnetic waves, Frequencies, Gamma Rays, Infrared, Light, light beam, Low Frequencies, Magnetic, MHz, Microwave exposure, Oscillate, Photons, Radio Waves, Spectrum, Visible Light.
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“..Electromagnetic radiation can be described in terms of a stream of photons, each traveling in a wave-like pattern, moving at the speed of light and carrying some amount of energy. … the only difference between radio waves, visible light, and gamma-rays is the energy of the photons. Radio waves have photons with low energies, microwaves have a little more energy than radio waves, infrared has still more, then visible, ultraviolet, X-rays, and gamma-rays.””Actually, the amount of energy a photon has makes it sometimes behave more like a wave and sometimes more like a particle. This is called the “ wave-particle duality” of light. …only in how it behaves. Low energy photons (such as radio) behave more like waves, while higher energy photons (such as X-rays) behave more like particles. …the electromagnetic spectrum can be expressed in terms of energy, wavelength, or frequency. Each way of thinking about the EM spectrum is related to the others in a precise mathematical way. The relationships are:
the wavelength equals the speed of light divided by the frequency
or
lambda = c / nu” http://imagine.gsfc.nasa.gov/docs/science/know_l2/emspectrum.html

Light, Color and Electromagnetic Frequency September 21, 2006

Posted by healthyself in 430 Trillion Hz-750 Trillion Hz, Auric Field, Beneficial frequencies, BioPhotons, Blogroll, Cell phone safety, Color, Electromagnetic Field, Electromagnetic Spectrum, Electromagnetic waves, Energy, Gamma Rays, Light, Low Frequencies, Oscillate, Penetration, Quantum Physics, Radio Waves, Red, Resonance, Spectrum, Subtle Energies, Transformation, vacuum, Vibration, Vibrational Medicine, Violet, Visible Light, Waves.
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…”The scientific notion of photons begins with the fact that these elementary particles of energy display two seemingly contradictory behaviors: One behavior has to do with how they act as members of a group (in a wavefront) and the other relates to how they behave in isolation (as discrete particles).”

“An individual photon may be thought of as a packet of waves cork-screwing rapidly through space. Each packet is an oscillation along two perpendicular axes of force – the electrical and the magnetic. Because light is an oscillation, wave-particles interact with each other.

“One way of understanding the dual-nature of light is to realize that wave after wave of photons affect our telescopes – but individual photons are absorbed by the neurons in our eyes.”…….. “Stars (such as our Sun) exist because space-time does more than simply transmit light as waves. Somehow – still unexplained-1 – space-time causes matter too. And one thing distinguishing light from matter is that matter has “mass” while light has none….”

….”In relationship to light, matter can be opaque or transparent – it can absorb or refract light. Light can pass into matter, through matter, reflect off matter, or be absorbed by matter. When light passes into matter, light slows – while its frequency increases. When light reflects, the path it takes changes. When light is absorbed, electrons are stimulated potentially leading to new molecular combinations. But even more significantly, when light passes through matter – even without absorption – atoms and molecules vibrate the space-time continuum and because of this, light can be stepped down in frequency….”

…”In addition to describing the gravitational effects of matter on space-time, Einstein performed an extremely elegant investigation into the influence of light associated with the photo-electric effect. Before Einstein, physicists believed light’s capacity to affect matter was based primarily on “intensity”. But the photo-electric effect showed that light effected electrons on the basis of frequency as well…….In addition to describing the gravitational effects of matter on space-time, Einstein performed an extremely elegant investigation into the influence of light associated with the photo-electric effect.. showed that light effected electrons on the basis of frequency as well. Thus red light – regardless of intensity – fails to dislodge electrons in metals, while even very low levels of violet light stimulate measurable electrical currents. Clearly the rate at which light vibrates has a power all its own.”

http://www.universetoday.com/am/publish/where_does_visible_light.html?2512005

“Light waves also come in many frequencies. The frequency is the number of waves that pass a point in space during any time interval, usually one second. It is measured in units of cycles (waves) per second, or Hertz (Hz). The frequency of visible light is referred to as color, and ranges from 430 trillion Hz, seen as red, to 750 trillion Hz, seen as violet. Again, the full range of frequencies extends beyond the visible spectrum, from less than one billion Hz, as in radio waves, to greater than 3 billion billion Hz, as in gamma rays.”

“As noted above, light waves are waves of energy. The amount of energy in a light wave is proportionally related to its frequency: High frequency light has high energy; low frequency light has low energy. Thus gamma rays have the most energy, and radio waves have the least. Of visible light, violet has the most energy and red the least.”

“Light not only vibrates at different frequencies, it also travels at different speeds. Light waves move through a vacuum at their maximum speed, 300,000 kilometers per second or 186,000 miles per second, which makes light the fastest phenomenon in the universe. Light waves slow down when they travel inside substances, such as air, water, glass or a diamond. The way different substances affect the speed at which light travels is key to understanding the bending of light, or refraction…”

“So light waves come in a continuous variety of sizes, frequencies and energies. We refer to this continuum as the electromagnetic spectrum …visible light occupies only one-thousandth of a percent of the spectrum.”

http://science.howstuffworks.com/light3.htm