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Author: admin | 09.01.2016 | Category: Ginkgo Biloba Tinnitus

So, both myself and Cognitive Daily have highlighted the recent news story that high school students have hit upon a ringtone that teachers can’t hear.
Many people who listened to the 14kHz sound reported not consciously hearing the sounds, but did perceive a ringing in their ear, or a small pain. We hear because thousands of tiny hair cells in the cochlea vibrate when sound waves enter the ear canal (for more read this). If you observe where the low frequency vs high frequency region of the cochlea is (in the diagram above), you’ll notice that the high freq portion is near the oval window.
As anecdotal evidence, I have personally observed more surviving hair cells in the apex vs the base when i intentially deafen animals. 2 – maybe not in your expertise but do you know if some people tried to build a mechanical ear?
I am no longer bothered by TVs unless I am really close to them, when I get that ringing or pressure feeling. Another interesting place to find a stratospheric tone is at the end of the last track of Sgt. Although its not directly related, I thought it would be worth mentioning here that TRPA1 cation channels present on the tip of stereocilia have been associated with mechanosensitive functions. I would like to use information from your blog, including answers to questions of questions for a children’s book I am writing. Retrospectacle has been a wonderful hobby and outlet for my writing for almost three years. Hence ALL sounds, low and high, vibrate that region to some extent while traveling to its point of destination.


This suggests some protective effect that the apical (low freq) region has that the base (hi freq) doesn’t.
I mean the ear is doing some kind of Fourier transform of the incoming audio signal, did some people try to reproduce this with mechanical devices (so that we can calculate FFT of signals with a device instead of first sampling the signal and then applying some algorithms on it to get the frequency domain content of the sound)? Ringing in the ears is a prevalent disoder called tinnitis, and represents a disorder of the nerves that connect the hair cells to the brain. The amount you are born with is it, and they gradually die as you expose them to loud noises (and certain drugs). This makes a lot of sense considering that the freq which are most important are lower ones, like you pointed out, human speech. While everyone experiences this ringing or buzzing to a slight degree, some people experience it ALL the time.
It is called a cochlear implant, and instead of replacing the entire ear per se, it interprets sound waves as electrical impulses which it transfers directly to the auditory nerve. But the cochlea is still able to perceive pain in the ear (this occurs with high frequencies often), even when hair cells are gone. This, in turn, equates more mechanical trauma for the region and likely contributes to a shorter life of the cell. This process happens at different rates for different people, due to environment and genes. An entering sound wave will vibrate a certain portion of the basilar membrane (frequency is rate of vibration), and since the hair cells sit atop this membrane, they too will receive stimulation. There is also a line of thought that many cellular and maturational process occur in a basal to apical cascade: inital inner ear development goes this way, as does apoptosis following acute trauma.


They are particularly effective in relaying sound where before there was none, but it takes a long time to train yourself to discriminate what you are hearing. Prolonged exposure to loud noises (rock concerts, jackhammers, etc) is the most common cause, but there exist others such as certain tumors, some antibiotics, fluid in the ear, etc.
Speech never sounds the same again (it is skewed towards hi freq so everyone sounds squeaky), and music cannot be perceived.
That is the hearing we are all born with, and it progressively worsens with age as we lose hair cells that sit on a particular portion of the basilar membrane. There are no real treatments for it, except perhaps cognitive therapy or masking the tinnitus with white noise.
The implant cannot recreate the ear’s fine-tuned frequency and tone discrimination, but it can help a profoundly deaf person function better in their environment.
That means that even the young people who could hear the 17kHz beep have still had some hearing loss, and quite naturally. I think that the state of these implants is still rather crude, but there is every reason to think their sensitivity will only get better. We lose hair cells starting at the highest (20kHz) first, working our way down the frequency spectrum as we get older.



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