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.
"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
Posted by healthyself in 2.402 GHz-2.480 GHz, 2450 MHz, 900 mHz, Bioeffects, Biological Effects, Blogroll, Body Temperature, Brainwave Interference, Cell phone safety, Cell Phones, Children's health, Cordless Phones, Decision Making, Definitions, ear ache, earphones, Electrical Pulses, Electrical Surges, Electromagnetic Communications, Electromagnetic Field, Electromagnetic Interference, Electromagnetic pollution, Electromagnetic Spectrum, Electromagnetic waves, Electrosensitivity, Electrosmog, EMF Research, EMF's, EMR, Environment, Exposure, Frequencies, GHz, grams of tissue, Health related, High Frequencies, HOuseholds, HRD, Hz, Lifestyle, Long Term Health Risks, Men's Health, Microwave exposure, Mobile Music, mobile telephones, Noise, Non-Thermal Levels, Pain Perception, Parenting, Penetration, Pulsed Radiation, Pulses, radiation, Radio Waves, Radios, Research Needed, Risk of Disease, Teenagers, Traffic Pollution, transmission, Who is Affected?, Women's Health.
Bluetooth is a method for datacommunication that uses short-range radiolinks to replace cables between computers and their connected units.
It is a matter of concern for some people that the carrier waves used by Bluetooth´s transmitters use the same frequency range as microwave owens (Bluetooth uses 2.402 GHz to 2.480 GHz). What does it feel like to get in the path of such waves?
Actually, the transmitting power is…too weak to be noticeable for humans….the radiation is not concentrated in a beam, but dispersed more or less in all directions. When using a wireless phone or a Bluetooth device, some of the emitted RF energy is absorbed by the body. The penetration depth is about 1.5 cm at 2450 MHz (about 2.5 cm at 900 MHz)…..The main absorption mechanism is fieldinduced rotation of polar molecules (for example H2O), which generates heat through molecular “friction”.
Heating by means of radio frequencies is possible over a broad frequency range. This is taken advantage of in microwave ovens at 2450 MHz using very high power levels (up to 1,000,000 times the power used by Bluetooth devices). However, 2450 MHz is not a resonance frequency of water. “There is, however, another side to this; some people are demonstrably over-sensitive to electromagnetic radiations. Long exposure to strong fields make some individuals so sensitive, after a few years, that they can no longer be near such fields without considerable discomfort. Bluetooth fits into a general development pattern where antennas for GSM-transmission and other sources of electromagnetic radiations become more and more prevalent in our cities. The future will show whether this is a healthy development.”
Posted by healthyself in Bioeffects, Biological Activity, Biological Dentistry, Biological Effects, Blogroll, Blood Pressure, Body Temperature, cell membrane, Cell phone safety, Cordless Phones, Decision Making, Definitions, Depression, Digital, Dopamine, Electrical Components, Electrical Surges, Electrical Wiring, electromagnetic, Electromagnetic Communications, Electromagnetic Field, Electromagnetic pollution, Electromagnetic waves, Electrosensitivity, Electrosmog, ELF, Emergency Medicine, EMF Research, EMF's, EMR, Frequencies, Health related, Hormones, Imbalances, Lifestyle, Melatonin, Memory, Memory Loss, Microwave exposure, Motor Activity, Pineal Gland, Pulsed Radiation, Pulses, Radar, Radio Waves, Radios, Research Needed, Risk Factor, Risk of Disease, Serotonin, Sick People, Skull, Sleep, Sleep disturbances, transmission, Who is Affected?.
Health Risks
“EMFs from cell phones are directed into the ear, jaws, teeth, eyes, scalp, brain, hypothalamus, sinuses, and pineal gland. The full extent of harm from external EMF exposure is not yet fully documented. A calcified pineal gland in humans reduces melatonin production, as is the case in 60% of Americans over 50 years of age. The pineal gland has documented effects on reproductive function, growth, body temperature, blood pressure, motor activity, sleep, tumor growth, mood, the immune system, and longevity. It has been known for over 20 years that very small magnetic fields influence the pineal gland, causing an increase, or decrease, in the production of melatonin and serotonin. These two neurohormones have many functions including the direct control of all biocycles in the body.”
“It has been known for sometime that, “radar beams (composed of pulsed microwaves) have the highest power densities of any EMR sources. In the lab, both radio frequency and microwave radiation have been shown to change the gateway-barrier function of cell membranes, upset hormone balances and induce chromosome defects, all of which are factors in malignant growth.”
“With the current proliferation of cell phone use, scientists and grassroots advocates have been attempting to raise public awareness about the health hazards associated with electromagnetic radiation (EMR) produced by cell phones and transmission towers. EMR pollution is not unique to the telecommunications industry. All electrical devices including hair dryers, electric blankets, computers, etc., produce electromagnetic radiation (EMR).”
