digplanet beta 1: Athena
Share digplanet:

Agriculture

Applied sciences

Arts

Belief

Business

Chronology

Culture

Education

Environment

Geography

Health

History

Humanities

Language

Law

Life

Mathematics

Nature

People

Politics

Science

Society

Technology

A consumer stereo bone conduction headset. The two transducers fit slightly in front of the ears.

Bone conduction is the conduction of sound to the inner ear through the bones of the skull. Bone conduction transmission can be used with individuals with normal or impaired hearing.

Overview[edit]

Bone conduction is one reason why a person's voice sounds different to him/her when it is recorded and played back. Because the skull conducts lower frequencies better than air, people perceive their own voices to be lower and fuller than others do, and a recording of one's own voice frequently sounds higher than one expects it to sound.[1][2]

Hearing aids[edit]

Some hearing aids employ bone conduction, achieving an effect equivalent to hearing directly by means of the ears. A headset is ergonomically positioned on the temple and cheek and the electromechanical transducer, which converts electric signals into mechanical vibrations, sends sound to the internal ear through the cranial bones. Likewise, a microphone can be used to record spoken sounds via bone conduction. The first description, in 1923, of a bone conduction hearing aid was Hugo Gernsback's "Osophone",[3] which he later elaborated on with his "Phonosone".[4]

At the Chalmers University of Technology in December 2012, surgeons performed an inaugural operation as part of a clinical study that involves a new bone-conduction hearing implant. Developed at Chalmers University, in collaboration with Sahlgrenska University Hospital in Gothenburg, Sweden, the invention differs from other bone-conduction implants, as it does not need to be anchored in the skull bone with a titanium screw through the skin and there is no risk of skin infections.[5] The inventors of the device claim that it could help functionally deaf people regain normal hearing. In January 2013, the researchers stated that they were aiming for the initial presentation of results in "early 2013" but, as of June 2013, results are not publicly available from the study.[6]

Products[edit]

Bone conduction products are usually categorized into three groups:

  • Ordinary products, such as hands-free headsets or headphones
  • Hearing aids and assistive listening devices
  • Specialized communication products (e.g. for underwater or high-noise environments)

One example of a specialized communication product is a bone conduction speaker that is used by scuba divers. The device is a rubber over-moulded, piezoelectric flexing disc that is approximately 40 millimetres (1.6 in) across and 6 millimetres (0.24 in) thick. A connecting cable is moulded into the disc, resulting in a tough, waterproof assembly. In use, the speaker is strapped against one of the dome-shaped bone protrusions behind the ear and the sound, which can be surprisingly clear and crisp, seems to come from inside the user's head.[citation needed]

Use in the 21st century[edit]

The Google Glass device employs bone conduction technology for the relay of information to the user through a transducer that sits beside the user's ear. The use of bone conduction means that any vocal content that is received by the Glass user is nearly inaudible to outsiders.[7]

German broadcaster Sky Deutschland and advertising agency BBDO Germany collaborated on an advertising campaign that uses bone conduction that was premiered in Cannes, France at the International Festival of Creativity in June 2013. The "Talking Window" advertising concept uses bone conduction to transmit advertising to public transport passengers who lean their heads against glass train windows. Academics from Australia's Macquarie University suggested that, apart from not touching the window, passengers would need to use a dampening device that is made of material that would not transmit the vibration from the window.[8][9]

Advantages[edit]

Bone conduction products have the following advantages over traditional headphones:

  • Does not block outside sound
  • Maintains sound clarity in very noisy environments
  • Can be used with hearing protection
  • No inner ear infection risks (ear canals remain ventilated)

Disadvantages[edit]

  • Crosstalk between stereo channels (the effect is insignificant for spatial localization of sound sources).[10]
  • Some implementations require more power than headphones
  • Reduced frequency bandwidth

See also[edit]

References[edit]

  1. ^ Zhi Cai; Alan G. Madsen; Douglas G. Richards; Martin L. Lenhardt (2002). "Response of Human Skull to Bone Conducted Sound in the Audiometric to Ultrasonic Range" (PDF). Response of Human Skull to Bone Conducted Sound in the Audiometric to Ultrasonic Range. Virginia Commonwealth University. Retrieved 3 July 2013. 
  2. ^ Brent Zupp (2003–2012). "Why Does Your Voice Sound Different on a Recording?". Wanderings. Brent Zupp. Retrieved 3 July 2013. 
  3. ^ US 1521287, Gernsback, Hugo, "Acoustic Apparatus", published 19 May 1923, issued 30 December 1924 
  4. ^ Kennedy, T. R., Jr. (1958). "From Coherer to Spacistor". Radio-Electronics (Gernsback Publications) 29 (4): 45–59. 
  5. ^ "New implant replaces impaired middle ear" (Press release). Chalmers. Chalmers University of Technology. 14 January 2013. Retrieved 3 July 2013. 
  6. ^ "Bone-conducting implant could help deaf people hear normally". The Engineer. Centaur Communications Ltd. 14 January 2013. Retrieved 3 July 2013. 
  7. ^ Charles Arthur (2 July 2013). "Google Glass – hands-on review". The Guardian. Retrieved 3 July 2013. 
  8. ^ Catherine McMahon; Phillip Nakad (12 July 2013). "Bone conduction: the new front in guerilla advertising". The Conversation Australia. Retrieved 15 July 2013. 
  9. ^ Leo Kelion (3 July 2013). "Talking train window adverts tested by Sky Deutschland". BBC News. Retrieved 15 July 2013. 
  10. ^ MacDonald, J.A.; Henry, P.P.; Letowski, T.R. (2006). "Spatial audio through a bone conduction interface". International Journal of Audiology (Informa Healthcare) 45 (10): 595–599. doi:10.1080/14992020600876519. 

External links[edit]


Original courtesy of Wikipedia: http://en.wikipedia.org/wiki/Bone_conduction — Please support Wikipedia.
This page uses Creative Commons Licensed content from Wikipedia. A portion of the proceeds from advertising on Digplanet goes to supporting Wikipedia.
38322 videos foundNext > 

Bone conduction: System that allows you to feel music

Subscribe to BBC News HERE http://bit.ly/1rbfUog Your ears are the best way to listen to sound, but they don't have a monopoly. Two sets of British entrepren...

Bone Conduction Headphones are the Future of Audio at CES 2013

Nixie takes a look at Aftershokz and their amazing Bluetooth open ear sport headphones from CES 2013. Plus a brand new gaming headset leak! Add me: http://pl...

STEMbite: Bone Conduction Speakers

Andrew Vanden Heuvel illustrates how to make your own bone conduction headphones...

Bone Conduction Hearing With AfterShokz Headphones

https://www.aftershokz.com/ Check out this video to see how AfterShokz bone conduction headphones transmit sound vs earbuds.

Cynaps Bone Conduction Headset Teardown

Becky Stern & Ladyada look inside the Cynaps bone conduction headset: http://learn.adafruit.com/cynaps-bone-conduction-headset-teardown/ --------------------...

REVIEW - Aftershokz - Bone Conduction Headphones

http://geekbeat.tv/aftershokzreview Cali Lewis gives us an inside look at Aftershokz bone conduction headphones - one of the most popular items from CES 2012.

Buhel Bone Conduction Technology

www.buhelstore.com presents a simple explanation of the innovative Buhel Bone Conduction Technology. This is how the Buhel bluetooth goggles and motorcycle h...

AfterShokz and TEAC Filltune HP-F100 Bone Conduction Headphones

Read full story here: http://www.innerfidelity.com/content/aftershokz-and-teac-filltune-hp-f100-bone-conduction-headphones.

Review: The AfterShokz Sportz M2 Bone Conduction Headphones with Microphone

It's like listening to the future. Bone conduction is a fascinating tech which is starting to work its way into the consumer space. The ability to interact w...

Turn Anything into a Speaker - Bone Conductor Amp

Turn almost anything into a speaker with a bone conductor transducer: http://learn.adafruit.com/3d-printed-bone-conduction-transducer-box -------------------...

38322 videos foundNext > 

6849 news items

BBC News

BBC News
Thu, 13 Nov 2014 16:25:27 -0800

Your ears are the best way to listen to sound, but they don't have a monopoly. Two sets of British entrepreneurs want to turn our upper bodies into sound systems. The voice of BBC Radio 4 veteran broadcaster John Humphrys feels literally guttural - it ...

Gadget Review (blog)

Gadget Review (blog)
Fri, 21 Nov 2014 07:00:00 -0800

The headphones have to balance between providing immersive sound while not cutting off the person from the “real” world where cars zip across walkways and bikes race over sidewalks. Panasonic's Open Ear Bone Conduction Headphones keeps the scale ...

Wareable

Wareable
Thu, 06 Nov 2014 06:25:51 -0800

Microsoft has been conducting trials with a bone conducting headset that could help to guide blind and visually impaired people around busy cities. The idea is that the user wears the headset, which uses similar bone conduction technology to that found ...

Digital Trends

Digital Trends
Wed, 05 Nov 2014 10:22:30 -0800

Under their current design, the SOUNDglass appear to place the bone conduction pads just forward from the ear. In this way, the vibrations created by the pads will pass through the skin, vibrating the bones in the wearer's head, where the signal gets ...
 
The Star Online
Sun, 09 Nov 2014 14:33:45 -0800

Developed with help from UK charity Guide Dogs, the headset incorporates bone conduction technology, which relays sound to the inner ear through neighbouring bones in the skull. Tester Jennifer Warnick reported that its sounds resembled the clip-clop ...
 
Pittsburgh Post Gazette
Sat, 22 Nov 2014 20:52:30 -0800

Panasonic's new bone conduction headphones fit around the back of your head and place a small rubber pad on your head just in front of your ear. The pad is shaped to help you find optimal placement for the best transmission of sound. They bypass the ...

CNN

CNN
Thu, 29 May 2014 04:54:42 -0700

(CNN) -- Long established as the premier portal for sound, your ears are facing increased competition from emerging techniques for transmission through your skeleton. Bone conduction has rapidly become a critical asset for treatment of hearing loss ...

UN News Centre

Scoop.co.nz (press release)
Sat, 22 Nov 2014 19:45:00 -0800

Equipment from the Centre is spread out all over Headquarters. Palm On keyboards can be found at other IT kiosks around the building. Other available services include: braille and other assistive keyboards, hearing aids, bone conduction headsets and ...
Loading

Oops, we seem to be having trouble contacting Twitter

Support Wikipedia

A portion of the proceeds from advertising on Digplanet goes to supporting Wikipedia. Please add your support for Wikipedia!

Searchlight Group

Digplanet also receives support from Searchlight Group. Visit Searchlight