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Interesting Articles and Essays about Science and Technology

Luxman

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"Tickling the Dragon's Tail"

The True Story of The Demon Core
 

Luxman

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What If Kardashev Was Wrong? | Unveiled
 

Luxman

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Tesla Valve | The complete physics
 

Luxman

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The Longest-Running Evolution Experiment
 

Luxman

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The Universe is Hostile to Computers
 

Luxman

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Declassified Footage - An Atomic Bomb Too Big to Actually Use
 

Luxman

#TRE45ON
Google Glass, conduction glasses, and conduction headphones use bone conduction to send the sound directly to the inner ear, bypassing the ear drums.
Most conduction glasses only have audio, they don't have a visual display like Google Glass did.
I've tried conduction glasses, the sound is very clear, and anyone standing next to you can't hear it at all.
You can buy conduction glasses at Amazon and other stores, and take it to an optometrist to have prescription lenses installed.
Conduction glasses have a rechargeable battery, and use bluetooth to connect to your smartphone. So you can have your phone in your pocket, and when you get a call just tap the side of the conduction glasses and talk. :cool:

I read an article years ago about a tiny IC chip radio about 1/8 inch in size that can be implanted in a upper jaw tooth filling or glued directly to the skull under the gums or skull skin, or glued to the skin behind the ear, and uses bone conduction for the person to hear. It has to be in the upper jaw or skull to conduct to the inner ear.
The tiny radio is powered by the radio signal it's receiving, similar to how a crystal radio works, and it uses a tiny piezoelectric 'speaker' to generate the sound.
It's a one-way radio so it can only receive a signal, because it has no power to send a signal, and it's hardwired to a very precise frequency.
It was developed by the CIA or other intelligence agency and used to send intel to undercover agents in the field. I don't know if the CIA ever used it.

The website used a tiny font, so I copied and pasted the text below the link so it's easier to read.

Bone Conduction: How it Works
http://www.goldendance.co.jp/English/boneconduct/01.html

We all hear sounds through both our bones (bone-conducted or bone-transmitted) and our eardrums (air-conducted or air-transmitted). Most sounds are heard by our eardrums. The eardrum converts the sound waves to vibrations and transmits them to the cochlea (or inner ear). However in some cases vibrations are heard directly by the inner ear bypassing your eardrums. In fact, this is one of the ways you hear your own voice. This is also how whales hear.

Ludwig van Beethoven, the famous 18th century composer who was almost completely deaf, discovered Bone Conduction. Beethoven found a way to hear the sound of the piano through his jawbone by attaching a rod to his piano and clenching it in his teeth. He received perception of the sound when vibrations transfer from the piano to his jaw. This has proven that sound could reach our auditory system through another medium besides eardrums and the other medium is our bones.

Normal sound waves are actually tiny vibrations in the air. The vibrations travel through the air to our eardrums. The eardrums in turn vibrate, decoding these sound waves into a different type of vibrations that are received by the Cochlea, also known as the inner ear. The Cochlea is connected to our auditory nerve, which transmits the sounds to our brain.

Bone Conduction bypasses the eardrums. In bone conduction listening, the bone conduction devices (such as headphones) perform the role of your eardrums. These devices decode sound waves and convert them into vibrations that can be received directly by the Cochlea so the eardrum is never involved. The “sound” reach the ears as vibrations through the bones (or skull) and skin.

Most cases of hearing loss are due to damages to the eardrums. Since bone conduction does not use the eardrums, people with hearing difficulties would be able to hear clearly again with bone conduction, provided that their cochlea is in healthy and normal condition.
Generally, hearing loss could be described into three categories. That would be conductive hearing loss, perceptive hearing loss and mixed hearing loss. Conductive hearing loss is associated with faulty transmission of sound and is mostly due to damages to the eardrums. Bone conduction is able to aid a conduction hearing loss because a bone conduction device performs the role of the eardrums. Perceptive hearing loss is associated with difficulty in sensing the vibrations by the auditory nerves at the cochlea. Bone conduction is less effective for perceptive hearing loss. As for mixed hearing loss, it is best to suggest a trial in advance to find out whether bone conduction could be an aid to mixed hearing loss because it differs among individual.
 
Last edited:

Theopolis Q. Hossenffer

I'm too lazy to set a usertitle.
Google Glass, conduction glasses, and conduction headphones use bone conduction to send the sound directly to the inner ear, bypassing the ear drums.
Most conduction glasses only have audio, they don't have a visual display like Google Glass did.
I've tried conduction glasses, the sound is very clear, and anyone standing next to you can't hear it at all.
You can buy conduction glasses at Amazon and other stores, and take it to an optometrist to have prescription lenses installed.
Conduction glasses have a rechargeable battery, and use bluetooth to connect to your smartphone. So you can have your phone in your pocket, and when you get a call just tap the side of the conduction glasses and talk. :cool:

I read an article years ago about a tiny IC chip radio about 1/8 inch in size that can be implanted in a upper jaw tooth filling or glued directly to the skull under the gums or skull skin, or glued to the skin behind the ear, and uses bone conduction for the person to hear. It has to be in the upper jaw or skull to conduct to the inner ear.
The tiny radio is powered by the radio signal it's receiving, similar to how a crystal radio works, and it uses a tiny piezoelectric 'speaker' to generate the sound.
It's a one-way radio so it can only receive a signal, because it has no power to send a signal, and it's hardwired to a very precise frequency.
It was developed by the CIA or other intelligence agency and used to send intel to undercover agents in the field. I don't know if the CIA ever used it.

The website used a tiny font, so I copied and pasted the text below the link so it's easier to read.

Bone Conduction: How it Works
http://www.goldendance.co.jp/English/boneconduct/01.html

We all hear sounds through both our bones (bone-conducted or bone-transmitted) and our eardrums (air-conducted or air-transmitted). Most sounds are heard by our eardrums. The eardrum converts the sound waves to vibrations and transmits them to the cochlea (or inner ear). However in some cases vibrations are heard directly by the inner ear bypassing your eardrums. In fact, this is one of the ways you hear your own voice. This is also how whales hear.

Ludwig van Beethoven, the famous 18th century composer who was almost completely deaf, discovered Bone Conduction. Beethoven found a way to hear the sound of the piano through his jawbone by attaching a rod to his piano and clenching it in his teeth. He received perception of the sound when vibrations transfer from the piano to his jaw. This has proven that sound could reach our auditory system through another medium besides eardrums and the other medium is our bones.

Normal sound waves are actually tiny vibrations in the air. The vibrations travel through the air to our eardrums. The eardrums in turn vibrate, decoding these sound waves into a different type of vibrations that are received by the Cochlea, also known as the inner ear. The Cochlea is connected to our auditory nerve, which transmits the sounds to our brain.

Bone Conduction bypasses the eardrums. In bone conduction listening, the bone conduction devices (such as headphones) perform the role of your eardrums. These devices decode sound waves and convert them into vibrations that can be received directly by the Cochlea so the eardrum is never involved. The “sound” reach the ears as vibrations through the bones (or skull) and skin.

Most cases of hearing loss are due to damages to the eardrums. Since bone conduction does not use the eardrums, people with hearing difficulties would be able to hear clearly again with bone conduction, provided that their cochlea is in healthy and normal condition.
Generally, hearing loss could be described into three categories. That would be conductive hearing loss, perceptive hearing loss and mixed hearing loss. Conductive hearing loss is associated with faulty transmission of sound and is mostly due to damages to the eardrums. Bone conduction is able to aid a conduction hearing loss because a bone conduction device performs the role of the eardrums. Perceptive hearing loss is associated with difficulty in sensing the vibrations by the auditory nerves at the cochlea. Bone conduction is less effective for perceptive hearing loss. As for mixed hearing loss, it is best to suggest a trial in advance to find out whether bone conduction could be an aid to mixed hearing loss because it differs among individual.
Very interesting.
 

absolutehell

The best things in life are Free!
This is not really a documentary or an article, but a movie you'd enjoy if you like science and technology. Though the concept is a bit farfetched, they have kept some of the basics like human cloning and algorithms to transfer data intact.
 

tvstrip

I changed my middle-name to Freeones
There are several great science & tech channels on youtube. Kurzgesagt is one of my favourites, with well-researched, interesting topics in an easy to digest format.
 
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