Nevertheless, exposure to high levels of nonionizing energy, such as at radio wave frequencies, can damage the structure and function of the nervous system.
Thanks to advancements in science, engineering and technology, we now know that microwaves are safe, effective and efficient. However, recent research from Texas A&M University reveals that exposure to certain extremely high-powered microwave and radio frequencies may result in high stresses within the brain.
High frequency sound causes two types of health effects: on the one hand objective health effects such as hearing loss (in case of protracted exposure) and on the other hand subjective effects which may already occur after a few minutes: headache, tinnitus, fatigue, dizziness and nausea.
In addition to decibel levels, harmful sound frequencies can also be damaging to human hearing. Low frequencies (under 20 Hz) and high frequencies (above 20,000 Hz) that humans cannot perceive can also affect the ear and have adverse effects on our health.
In summary, these studies indicate that EMR can lead to metabolic disorders of monoamine neurotransmitters in the brain, depending on the intensity of radiation exposure, and might in theory result in abnormal emotional behavior.
RF radiation has lower energy than some other types of non-ionizing radiation, like infrared and visible light, but it has higher energy than extremely low-frequency (ELF) radiation. If RF radiation is absorbed by the body in large enough amounts, it can produce heat. This can lead to burns and body tissue damage.
It has been found that RF-EMF can induce changes in central nervous system nerve cells, including neuronal cell apoptosis, changes in the function of the nerve myelin and ion channels; furthermore, RF-EMF act as a stress source in living creatures.
Low-frequency sounds are 500 Hz or lower while high-frequency waves are above 2000 Hz. Human ears can register sounds from about 20 Hz in frequency up to 20,000 Hz, depending of course, upon the hearer. People with hearing loss usually have trouble hearing sounds in the higher frequency range.
Increasing exposure to ultrasound in the air causes nausea, dizziness, migraine, fatigue and tinnitus.
Preventing hearing loss is the best way to avoid it because high-frequency hearing loss cannot be reversed. The best way to protect your hearing is to avoid high noise levels, especially noise that is louder than 85 decibels.
High Frequency Sounds
“High frequencies are food for the brain. They energize it, stimulate it, make it alert and enable it to focus and remember” (Listening for Wellness). The cochlea is a huge help when it comes to giving us energy. The cochlea is filled with tiny hair cells that help turn frequencies into sounds.
For example, exposure to 4000 Hz produced damage in a restricted region of the cochlea and hearing loss for a relatively narrow range of frequencies; exposure to 125 Hz produced wide-spread inner ear damage and hearing loss throughout the frequency range 125 to 6000 Hz.
More surprisingly, they found that the frequencies responsible for making a sound unpleasant were commonly found in human speech, which ranges from 150 to 7000 hertz (Hz). The offending frequencies were in the range of 2000 to 4000 Hz. Removing those made the sounds much easier to listen to.
Gamma waves are the highest frequency at 30 hertz (Hz) and up, meaning neurons are firing at the rapid pace of 30 times or more every second. This brain state is associated with intense concentration. Beta waves run at 12 Hz to 30 Hz and are tied to feelings of arousal, attention, and anxiety.
What effect does it have on your brain? It turns out, the music or sounds we listen to can make a big difference, and the right frequency can even help you study better, reduce stress, and improve focus.
The highest frequency brain waves are apparently called gamma waves. These waves can have a frequency of anywhere between 25 and 100 Hz. People whose brains produce more gamma waves are said to have greater ability to concentrate, focus and experience higher levels of cognition.
Increasing exposure to ultrasound in the air causes nausea, dizziness, migraine, fatigue and tinnitus. LONDON: Exposure to airborne ultrasound - high frequency sounds beyond the range of human hearing - from public address systems, loudspeakers and door sensors may be making people ill, a new study has claimed.
Low frequency sounds can be harmful
Human beings are normally able to detect sounds in the range of 20-20,000 Hz and it is well known that sounds within this range can damage the hearing. However, sounds under the frequency of 20 Hz can also affect the ear even though we are unable to hear them.
According to recent studies, your brain learns and expresses fear at a certain brainwave frequency, and changing the frequency can change the feeling. Researchers found that the brainwave frequency of fear is four cycles per second, or 4 hertz.
6 Hz beat enhances all area of the brain within 10 minutes. 8 Hz and 25 Hz beats have no clearly responses while 40 Hz beat enhances the responses in frontal lobe. These brain responses can be used for brain modulation application to induce the brain activity in further studies.
The important parts of the human body vibration frequency are generally located in about 3 Hz–17 Hz. According to the International Standard ISO 2631 in the vertical vibration of the human body, the sensitive range is located in 6 Hz–8 Hz.
From the dawn of life on Earth, the planet has had what's known as “natural frequency." The Earth's natural frequency is called the Schumann Resonance, which pulsates at a rate of 7.83 hertz. It surrounds and protects all living things on the planet.
EMF regulation (2016) clearly noted that long-term low-dose electromagnetic radiation exposure can lead to central nervous system dysfunction (Van, 2000; Wijngaarden, 2000). EMF exposure can cause neurobehavioral disorders, including circadian imbalance, headache, fatigue, depression and anxiety.
electric field strengths exceeding 5 kV/m," or to magnetic fields exceeding 0.1 mT (1 gauss or 1,000 mG). Electrical workers, such as utility linemen or electrical service personnel, should not be exposed to electric fields greater than 10 kV/m except for short periods of time.
The symptoms most commonly experienced include dermatological symptoms (redness, tingling, and burning sensations) as well as neurasthenic and vegetative symptoms (fatigue, tiredness, concentration difficulties, dizziness, nausea, heart palpitation, and digestive disturbances).