Navigation Links
Carnegie Mellon scientists show brain uses optimal code for sound

Scientists at Carnegie Mellon University have discovered that our ears use the most efficient way to process the sounds we hear, from babbling brooks to wailing babies. These results represent a significant advance in our understanding of how sound is encoded for transmission to the brain, according to the authors, whose work is published with an accompanying "News and Views" editorial in the Feb. 23 issue of Nature.

The research provides a new mathematical framework for understanding sound processing and suggests that our hearing is highly optimized in terms of signal coding--the process by which sounds are translated into information by our brains--for the range of sounds we experience. The same work also has far-reaching, long-term technological implications, such as providing a predictive model to vastly improve signal processing for better quality compressed digital audio files and designing brain-like codes for cochlear implants, which restore hearing to the deaf.

To achieve their results, the researchers took a radically different approach to analyzing how the brain processes sound signals. Abstracting from the neural code at the auditory nerve, they represented sound as a discrete set of time points, or a "spike code," in which acoustic components are represented only in terms of their temporal relationship with each other. That's because the intensity and basic frequency of a given feature are essentially "kernalized," or compressed mathematically, into a single spike. This is similar to a player piano roll that can reproduce any song by recording what note to press when the spike code encodes any natural sound in terms of the precise timings of the elemental acoustic features. Remarkably, when the researchers derived the optimal set of features for natural sounds, they corresponded exactly to the patterns observed by neurophysiologists in the auditory nerves.

"We've found that timing of just a sparse number of spikes actually enco
'"/>

Source:Carnegie Mellon University


Page: 1 2 3

Related biology news :

1. Carnegie Mellon scientists develop tool that uses MRI to visualize gene expression in living animals
2. Robot-based system developed at Carnegie Mellon detects life in Chiles Atacama desert
3. Green catalyst destroys pesticides and munitions toxins, finds Carnegie Mellon University
4. Carnegie Mellon University research reveals how cells process large genes
5. Carnegie Mellon cyLab researchers work to develop new red tide monitoring
6. Team led by Carnegie Mellon University scientist finds first evidence of a living memory trace
7. Carnegie Mellon scientists create PNA molecule with potential to build nanodevices
8. Carnegie Mellon U. transforms DNA microarrays with standard Internet communications tool
9. Carnegie Mellon develops non-invasive technique to detect transplant rejection at cellular level
10. DNA conclusive yet still controversial, Carnegie Mellon professor says
11. Teens unaware of sexually transmitted diseases until they catch one, Carnegie Mellon study finds
Post Your Comments:
*Name:
*Comment:
*Email:
TAG: Carnegie Mellon scientists show brain uses optimal code for sound

(Date:8/20/2015)... SANTA CLARA, Calif. , Aug. 20, 2015 ... based company focused on improving the user experience ... voice and vision technologies, today announced that its ... and voice biometric authentication software to be ... Alliance tested TrulySecure for compliance with the FIDO ...
(Date:8/18/2015)... Research and Markets ( http://www.researchandmarkets.com/research/9dmm6l/global_biometric ) ... Biometric Authentication & Identification Market: Focus On Modality, ... report to their offering. ... is expected to grow at an estimated CAGR ... over $25 billion (approximately) by 2020 as per ...
(Date:8/12/2015)... NEW YORK , Aug. 12, 2015 /PRNewswire/ ... how hackers can attack Android phones to steal ... identifies the increasing availability of fingerprint scanners on ... of utmost concern. To secure biometrics on mobile ... platform to augment these convenient authentication systems with ...
Breaking Biology News(10 mins):TrulySecure From Sensory Becomes First Face and Voice Biometrics Technology to be FIDO UAF Certified 2TrulySecure From Sensory Becomes First Face and Voice Biometrics Technology to be FIDO UAF Certified 3TrulySecure From Sensory Becomes First Face and Voice Biometrics Technology to be FIDO UAF Certified 4TrulySecure From Sensory Becomes First Face and Voice Biometrics Technology to be FIDO UAF Certified 5Global Biometric Authentication & Identification Market 2015: Focus On Modality, Motility & Application - Estimation & Forecasts to 2020 for the $25 Billion Industry 2HYPR Corp. Addresses Android Vulnerability That Exposes Ecosystem-wide Biometric Security Challenges 2HYPR Corp. Addresses Android Vulnerability That Exposes Ecosystem-wide Biometric Security Challenges 3
... , Scientists from the University of Granada and ... out that some critical patients could improve their oxide stress ... antioxidant treatment through food. This study has proved that the ... Unit (ICU), due to the low levels of antioxidant food ...
... New Hampshire researchers have received a significant grant ... a sustainable closed agroecosystem, exploring viable strategies for ... the U.S. Department of Agriculture,s Sustainable Agricultural Research ... closing energy and nutrient cycles could help small ...
... Conn.Yale Environment 360, a new online magazine dedicated to ... http://e360.yale.edu . Edited by Roger Cohn, the former editor ... aims to become one of the leading Web sites ... of the day. The magazine,s inaugural edition features ...
Cached Biology News:A nutritional supplement could improve the clinical situation of ICU patients 2UNH receives $380,000 grant to study organic dairy as closed ecosystem 2UNH receives $380,000 grant to study organic dairy as closed ecosystem 3Yale Environment 360 magazine launches online 2
(Date:8/31/2015)... ... 2015 , ... The Food Processing Suppliers Association's PROCESS EXPO ... manufacturers and leaders in the field of academia. , METTLER TOLEDO will ... of bakery and snacks; beverages; dairy; meat, poultry and seafood; and prepared foods. ...
(Date:8/28/2015)... According to a new market ... Systems, Thawing Equipment, Alarms), by Biospecimen (Human Tissue, Stem ... User - Global Forecast to 2020", published by MarketsandMarkets, ... 3,731.03 Million by 2020 from USD 2,150.48 Million in ... and 2020. Browse 74 Tables and ...
(Date:8/28/2015)... ... ... launch of FireflySci Inc. (FFS) in early 2015, the company continues to shake up the ... Fonz in a lab coat and Large Marge have been posted on the company’s Facebook ... FireflySci is proud to be the only cuvette manufacturer is the world that has an ...
(Date:8/27/2015)... Aug. 27, 2015 The National Necrotizing ... eyes—and life—were saved by doctors at Vanderbilt University Hospital ... NNFF, NovaBay Pharmaceuticals and Dr. John Crew , ... at Seton Medical Center in Daly City, ... a breakthrough approach, pioneered by Dr. Crew, that had ...
Breaking Biology Technology:METTLER TOLEDO Hosts Food Safety Educational Center at 2015 PROCESS EXPO 2Biopreservation Market Worth 3,731.03 Million USD by 2020 2Biopreservation Market Worth 3,731.03 Million USD by 2020 3Biopreservation Market Worth 3,731.03 Million USD by 2020 4Biopreservation Market Worth 3,731.03 Million USD by 2020 5Cuvette Manufacturer FireflySci Launches Back to School Deals with Complimentary Shipping On All Orders 2Patient's Life and Eyes Saved from Gruesome Flesh-Eating Infection Consuming Her Face 2Patient's Life and Eyes Saved from Gruesome Flesh-Eating Infection Consuming Her Face 3
... on your lap lately, you probably noticed a burning ... and more heat, which has to go somewhere ... at the University of Virginia,s School of Engineering and ... will solve the problem using nanoelectronics, considered the essential ...
... Delaware man,s vision,comes true, Americans will become just ... breast cancer, and to get started on that, ... awareness campaign in his home state this,month., ... Foundation,and early this month kicked off a $100,000 ...
... Fla., Sept. 29 CPC of America, Inc.,(OTC ... retained FTI,Capital Advisors, LLC, the investment banking subsidiary ... the Company., As CPC of America,s financial ... any expressions of interest from third parties seeking ...
Cached Biology Technology:Engineers aim to solve 'burning' computer problem 2Delaware Man Spearheads Brain Tumor Awareness 2CPC of America, Inc. to Explore Strategic Alternatives; Appoints FTI Capital Advisors to Assess Potential Opportunities 2
... stain for staining RNA (bluish-purple), DNA (blue), proteins (red) ... ≥ 90 % Cation traces: Ca ≤ 10 mg/kg ... ≤ 5 mg/kg Cu ≤ 5 mg/kg Fe ≤ ... mg/kg Mn ≤ 5 mg/kg Na ≤ 50 mg/kg ...
Sf21 Insect Cells (Live) in Max-XP Medium...
... MJ Mini thermal cycler is a compact instrument ... 0.2 ml tubes, 12 x 0.5 ml tubes, ... lid uses a thumbwheel to adjust height and ... cycling. Peltier heat pumps provide excellent thermal performance, ...
... IHC Select Immunophosphatase Secondary Detection System is ... Select Prediluted Primary Antibody reagents, which contain ... identification of antigens by light microscopy in ... Detection System may also be used with ...
Biology Products: