Navigation Links
A middle-ear microphone
Date:4/29/2012

one instead uses an accelerometer a 2.5-microgram mass attached to a spring that would be placed in a sealed package with a low-power silicon chip to convert sound vibrations to outgoing electrical signals.

The package is glued to the umbo so the accelerometer vibrates in response to eardrum vibrations. The moving mass generates an electrical signal that is amplified by the chip, which then connects to the conventional parts of a cochlear implant: a speech processor and stimulator wired to the electrodes in the cochlea.

"Everything is the same as a conventional cochlear implant, except we use an implantable microphone that uses the vibration of the bone," Young says.

To test the new microphone, the researchers used the temporal bones bones at the side of the skull and related ear canal, eardrum and hearing bones from four cadaver donors.

The researchers inserted tubing with a small loudspeaker into the ear canal and generated tones of various frequencies and loudness. As the sounds were picked up by the implanted microphone, the researchers used a laser device to measure the vibrations of the tiny ear bones. They found the umbo where the eardrum connects to the hammer or malleus produced the greatest sound vibration, particularly if the incus or anvil bone first was removed surgically.

The experiments showed that when the prototype microphone unit was attached to the umbo, it could pick up medium pitches at conversational volumes, but had trouble detecting quieter, low-frequency sounds. Young plans to improve the microphone to pick up quieter, deeper, very low pitches.

In the tests, the output of the microphone went to speakers; in a real person, it would send sound to the implanted speech processor. To demonstrate the microphone, Young also used it to record the start of Beethoven's Ninth Symphony while implanted in a cadaver ear. It is easily recognizable, even if somewhat fuzzy and muffled.

"The
'/>"/>

Contact: Lee Siegel
lee.siegel@utah.edu
801-581-8993
University of Utah
Source:Eurekalert  

Page: 1 2 3 4 5

Related biology news :

1. Orca ears inspire Stanford researchers to develop ultrasensitive undersea microphone
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
A middle-ear microphone
(Date:5/22/2015)...  NXT-ID, Inc. (NASDAQ: NXTD ) ("NXT-ID" or the ... its promotional pricing and making the Wocket generally available for ... , Head of Marketing said, "We,ve extended the opportunity to ... of May. To get your wocket at this special price, ... store on June 1, you,ll receive a unique code that ...
(Date:5/22/2015)... , May 22, 2015 According ... by Solution (2D, 3D, Thermal, Emotion, Forensic), by Software (Middleware, ... (Government and Utilities, Consumer and Home) - Global Forecast ... grow from $2.77 Billion in 2015 to $6.19 Billion ... Browse 79 market data Tables and   43 ...
(Date:5/21/2015)... 2015 According to a ... (Hardware, Software, Services), by Applications (Surveillance (Airborne, Maritime, ... End-Users (Military & Defense & Commercial) - Global ... Market is expected to grow from $7252.0 Million ... a Compound Annual Growth Rate (CAGR) of 6.6%. ...
Breaking Biology News(10 mins):NXT-ID, Inc Announces Retail Price For Wocket Smart Wallet And Extends Discounted Promotional Price Till End Of May 2NXT-ID, Inc Announces Retail Price For Wocket Smart Wallet And Extends Discounted Promotional Price Till End Of May 3Facial Recognition Market Worth $6.19 Billion by 2020 2Facial Recognition Market Worth $6.19 Billion by 2020 3Thermal Imaging Market Worth $9,998.9 Million by 2020 2Thermal Imaging Market Worth $9,998.9 Million by 2020 3Thermal Imaging Market Worth $9,998.9 Million by 2020 4
... tough for wildlife living at the frontier between Uganda and ... in a national park and wildlife preserve on the Congolese ... an adjoining Ugandan park. And yet, the profusion of ... individuals of the emblematic African lion, according to new research ...
... in Nevada for turning algae into biofuel has successfully ... of Nevada, Reno. The project is on track to ... energy source in Nevada. University researchers have ... part of their collaborative algae-to-biofuels project with their industry ...
... key phase in the repair process of damaged human ... team of researchers at the University of California, Davis. ... by a protein known as Rad51, which is linked ... The breakthrough comes a decade after Stephen ...
Cached Biology News:Research uncovers surprising lion stronghold in war-torn central Africa 2Research uncovers surprising lion stronghold in war-torn central Africa 3Success for first outdoor, large-scale algae-to-biofuel research project in Nevada 2Human DNA repair process recorded in action 2
(Date:5/22/2015)... May 22, 2015  Actavis plc (NYSE: ACT ... Court of Appeals for the Second Circuit has issued ... requiring the Company to continue distribution of NAMENDA ® ... http://photos.prnewswire.com/prnh/20130124/NY47381LOGO   "While we are ... we intend to continue our strong efforts to convey ...
(Date:5/22/2015)... According to a new market ... Gel Electrophoresis, Agarose & Polyacrylamide Gel, Capillary Electrophoresis, Isoelectric ... & by End User - Global Forecast to 2020", ... reach around $1.98 Billion by 2020 with a CAGR ... Browse 226 ma rket data ...
(Date:5/22/2015)... Lawrence, MA (PRWEB) May 22, 2015 ... that the U.S. Department of Agriculture (USDA), Grain ... a five year contract to Charm Sciences to ... Aflatoxin Quantitative Test (water-based) and ROSA FAST Aflatoxin ... WET-S5 Aflatoxin Quantitative Test uses Water Extraction ...
(Date:5/22/2015)... 22, 2015 Knowledgent , the ... that explores the potential of big data analytics in ... was developed to help life sciences and healthcare organizations ... to gain critical business insights. , The life sciences ... data driven by patient profiling, compliance and regulatory requirements, ...
Breaking Biology Technology:Actavis Confirms Appeals Court Ruling Requiring Continued Distribution of NAMENDA IR 2Actavis Confirms Appeals Court Ruling Requiring Continued Distribution of NAMENDA IR 3Actavis Confirms Appeals Court Ruling Requiring Continued Distribution of NAMENDA IR 4Actavis Confirms Appeals Court Ruling Requiring Continued Distribution of NAMENDA IR 5Actavis Confirms Appeals Court Ruling Requiring Continued Distribution of NAMENDA IR 6Actavis Confirms Appeals Court Ruling Requiring Continued Distribution of NAMENDA IR 7Actavis Confirms Appeals Court Ruling Requiring Continued Distribution of NAMENDA IR 8Electrophoresis Market Worth $1.98 Billion by 2020 2Electrophoresis Market Worth $1.98 Billion by 2020 3Electrophoresis Market Worth $1.98 Billion by 2020 4USDA-GIPSA (FGIS) Awards 5 Year Contract for Aflatoxin Tests to Charm Sciences 2New White Paper Explores the Potential of Big Data Analytics in Life Sciences and Healthcare 2
... to revolutionize the world of sensors: motion, chemical, temperature, ... down to the nano requires finding a means to ... In a paper appearing in Nano Letters ... of MIT,s Department of Civil and Environmental Engineering say ...
... PARK, N.J., June 1 Today, BASF filed a lawsuit ... Delaware against DuPont (E. l. du Pont de Nemours and ... to a key class of herbicides. Specifically, DuPont,s Optimum GAT ... genetic component that enables successful tolerance toward an herbicide class ...
... Multifaceted agreement enhances Microsoft Amalga Life Sciences to accelerate ... REDMOND, Wash., June 1 Microsoft Corp. today announced ... Co. Inc. to acquire certain assets of Rosetta Biosoftware, ... owned subsidiary of Merck & Co. Inc. The deal ...
Cached Biology Technology:Biomimetic-engineering design can replace spaghetti tangle of nanotubes in novel material 2BASF Sues DuPont for Patent Infringement 2Microsoft Signs Agreement With Merck & Co. Inc. to Acquire Assets of Rosetta Biosoftware, Strengthening Position in Life Sciences Industry 2Microsoft Signs Agreement With Merck & Co. Inc. to Acquire Assets of Rosetta Biosoftware, Strengthening Position in Life Sciences Industry 3
... a base medium for preparation of minimal and ... but does not contain amino acids. Both bulk ... pouch contains reagents to prepare 500 ml of ... of 10X YNB for S. cerevisiae media. Store ...
... The RapidCycler is the first instrument ... reactions and is used by thousands of ... Roche LightCycler Capillary tubes which are ideally ... their thin walls and extremely high surface-area-to-volume ...
... The GSTTag Monoclonal Antibody is a ... affinity to the 26 kDa glutathione-S-transferase ... This purified antibody is suitable for ... sequence expressed in E. coli , ...
... Blue LED produces output at 470 nm; ... with an S2000 or installed into rack or ... Pulsed Light Source is an LED that produces ... -- the blue region -- for fluorescence measurements. ...
Biology Products: