are high frequency sound waves dangerous?
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The most dangerous sounds are high in intensity (dB level) and have a high frequency. This is because a large number of sound waves are transmitted to the ears with a force greater than your ears can tolerate. Noise-induced hearing loss cannot be reversed, and a hearing aid does little good.
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Plus, having the source of the sound in your ear canal like earbuds can increase a sound's volume by 6 to 9 decibels — enough to cause damage. But remember that headphones that go over your ears can also damage your hearing if you use them too long or play music too loudly.
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A low frequency sound (say, 50 hz) might sound like a low rumble, while a high frequency sound (say 12,000 hz), might sound more like a "sizzle". ... The higher the frequency, the shorter the distance between each successive compression (or rarification) in the incoming sound wave.
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Some studies have shown that at high intensities, infrasonic sounds can have extra-aural bioeffects, including nausea, headaches, and dizziness, but why? The short answer: bad vibrations. Sound is a wave of pressure traveling through a medium.
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Loud Noise Can Injure Fish Hearing. Summary: New research shows that loud noise significantly damages the ears of fish in the wild. In the first ever study of the effects of loud man-made, or anthropogenic, sound on fish in the wild, University of Maryland professor Arthur N.
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Decibel Level​ Sounds at or below 70 dBA are generally considered safe. Any sound at or above 85 dBA is more likely to damage your hearing over time. Researchers have found that people who are exposed over long periods of time to noise levels at 85 dBA or higher are at a much greater risk for hearing loss.
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Sounds at or below 70 dBA are generally considered safe. Any sound at or above 85 dBA is more likely to damage your hearing over time. Researchers have found that people who are exposed over long periods of time to noise levels at 85 dBA or higher are at a much greater risk for hearing loss.
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E.g. the highest frequency humans can hear is at 20000 Hz (one wave every 0.05ms).
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The frequency of the wave is related to the intensity of the sound. The larger-frequency oscillations indicate greater pressure maxima and minima, and the pressure is higher in greater-intensity sound. The wavelength of the wave is related to the intensity of the sound.
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The 'normal' hearing frequency range is is about 20 to 20,000Hz for a healthy young person . Though a 'normal' audible range for loudness is from 0 to 180dB, anything over 85dB is considered damaging, so we should try not to go there.
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We consider that radio waves, after these evidences, are dangerous (especially for long exposition) for human body because, even if they are not unhealthy in a short period, they can cause cells' death by apoptosis and necrosis and DNA damage. Thus they can cause organs failure and generalized problems to organism.
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TL;DR (Too Long; Didn't Read) The most dangerous frequencies of electromagnetic energy are X-rays, gamma rays, ultraviolet light and microwaves. X-rays, gamma rays and UV light can damage living tissues, and microwaves can cook them.
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A typical hair blow dryer has an intensity of about 85 dB, but if they're used for just brief periods, they're unlikely to damage hearing. However, long or repeated exposure to sounds at or above 85 dB can cause problems. The louder the sound, the quicker the damage.
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Headphones, in and of themselves, are not a risk. You could listen all day at a low-to-middle volume without health worries. It's only once you start listening to loud volumes for sustained periods of time that they can start damaging your ears.
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Sound is measured in decibels (dB). A whisper is about 30 dB, normal conversation is about 60 dB, and a motorcycle engine running is about 95 dB. Noise above 70 dB over a prolonged period of time may start to damage your hearing. Loud noise above 120 dB can cause immediate harm to your ears.
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High-frequency hearing loss occurs when the tiny hair-like sensory hearing cells in your cochlea (inner ear) are damaged. These hair cells, known as stereocilia, are responsible for translating the sounds your ears collect into electrical impulses, which your brain eventually interprets as recognizable sound.
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Loud noise can damage cells and membranes in the cochlea. Listening to loud noise for a long time can overwork hair cells in the ear, which can cause these cells to die. The hearing loss progresses as long as the exposure continues. Harmful effects might continue even after noise exposure has stopped.