Navigation Links
Study links low-frequency hearing to shape of the cochlea
Date:4/25/2008

whispering gallery effect in which soft sounds that travel along curved walls in a large chamber remain loud enough that they can be heard clearly on the opposite side of the room.

When sound waves enter the ear, they strike the eardrum and cause it to vibrate. Tiny bones in the ear amplify and transmit these vibrations to the fluid in the cochlea, creating pressure waves that travel along a narrowing canal in the coiled tube-like organ. The canal is one of two main chambers that are created by an elastic membrane that runs the length of the cochlea. The mechanical properties of this basilar membrane vary from very stiff at the broad, outer end to increasingly flexible toward the inner end as the chambers narrow. The basilar membranes graded properties cause the waves to grow and then die away. Different frequencies peak at different positions along the membrane.

Sensory cells are attached to the basilar membrane and have tufts of tiny hairs called stereocilia that stick up into adjacent structures in the canal. As the basilar membrane moves it tilts the sensory cells, causing the stereocilia to bend. The motion generates electric signals that travel along the auditory nerve to the brain. As a result, the sensory cells near the outer end of the cochlea detect high-pitched sounds, like the notes of a piccolo, while those at the inner end of the spiral detect lower-frequency sounds, like the booming of a bass drum.

This mechanical ordering of response from high to low frequencies works in the same fashion whether the cochlear tube is laid out straight or coiled in a spiral. But Manoussakis calculations predicted that the spiral shape causes the energy in the low-frequency waves to accumulate against the outside edge of the chamber. This uneven energy distribution, in turn, causes the membrane to move more toward the outer wall of the chamber, enhancing the bending of the stereocilia. The enhancement is strongest at the apex of the spiral, whe
'/>"/>

Contact: David F. Salisbury
david.salisbury@vanderbilt.edu
615-343-6803
Vanderbilt University
Source:Eurekalert

Page: 1 2 3 4

Related biology news :

1. Childhood obesity indicates greater risk of school absenteeism, Penn study reveals
2. A study by the MUHC and McGill University opens a new door to understanding cancer
3. Study begins to reveal clues to the cause and progression of sepsis
4. Clones on task serve greater good, evolutionary study shows
5. New study warns limited carbon market puts 20 percent of tropical forest at risk
6. New study examines how rearing environment can alter navigation
7. Study links cat disease to flame retardants in furniture and to pet food
8. New continent and species discovered in Atlantic study
9. Study shows link between alcohol consumption and hiv disease progression
10. Feeling hot, hot, hot: New study suggests ways to control fever-induced seizures
11. Study finds environmental tests help predict hospital-acquired Legionnaires disease risk
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:5/8/2015)... 8, 2015 Synaptics Inc. (NASDAQ: SYNA ), ... members of the executive management team will present at the ... Media and Telecom Conference Date: May 18, 2015 ... Boston, MA Cowen and Company Technology, ... ET Location: The New York Palace Hotel, New ...
(Date:4/27/2015)... Apr. 27, 2015 NXT-ID, Inc. (NASDAQ: ... company focused on the growing mobile commerce market, announces ... pre-order customers the first week of May, 2015 and ... of May. Gino Pereira , ... for the company as Wocket® enters the consumer market. ...
(Date:4/17/2015)... April 17, 2015 ... and technological advancement to drive biometric systems market ... 2020   According to a recently ... Systems Market Forecast &  Opportunities, 2020 ", biometric systems market in ... register growth at CAGR of over 22% through ...
Breaking Biology News(10 mins):Synaptics to Present at Upcoming Investor Conferences 2Wocket, the Smartest Wallet You Will Ever Own, Announces Shipment to Pre-order Customers 2Wocket, the Smartest Wallet You Will Ever Own, Announces Shipment to Pre-order Customers 3Saudi Arabia Biometric Systems Market to Grow at 22% Through 2020, Says TechSci Research 2Saudi Arabia Biometric Systems Market to Grow at 22% Through 2020, Says TechSci Research 3
... the U.S. Food and Drug Administration (FDA) and the ... in advancing efforts toward the development of an artificial ... and effective testing of artificial pancreas technology in real-life ... a strong consensus among leading clinicians, researchers and industry ...
... PROVIDENCE, R.I. [Brown University] When a foreign object such ... invade it but also organize into a slick coating ... sophisticated organized crime rings, biofilms cannot be defeated by a ... need sophisticated new intelligence that reveals the key players in ...
... communicate via chemical transmitters which they store in the ... able to react reliably to stimulation, neurons must have ... help of a new method, neuroscientists at the Max ... discovered that neurons systematically recycle the protein components necessary ...
Cached Biology News:JDRF clinical panel recommends next steps for artificial pancreas clinical testing 2JDRF clinical panel recommends next steps for artificial pancreas clinical testing 3Research provides new leads in the case against drug-resistant biofilms 2Synapses recycle proteins for the release of neurotransmitters 2
(Date:5/21/2015)... 2015  The EveryLife Foundation for Rare Diseases ... Amy Klobuchar (D-MN) today for introducing ... Treatments, or OPEN ACT. Supported by ... this bipartisan legislation promises to rapidly bring hundreds ... disease patients by incentivizing drug makers to "repurpose" ...
(Date:5/21/2015)... ARIZ. (PRWEB) May 21, 2015 As ... Webb Medical Center (BDWMC), Sun Health Foundation funded a ... center’s new inpatient pharmacy with the most up-to-date features ... open June 2. The pharmacy's 45 staff members will ... larger 4,895-square-foot space in the coming days. , ...
(Date:5/20/2015)... SOUTH SAN FRANCISCO, Calif. , May 20, ... VCYT ) today presented preliminary data demonstrating ... help distinguish idiopathic pulmonary fibrosis (IPF) from other ... bronchoscopy. The findings suggest the classifier,s potential to ... expensive surgery to resolve ambiguity in IPF diagnosis ...
(Date:5/20/2015)... (PRWEB) May 20, 2015 The global ... of 22.3% during the forecast period of 2015 to ... increasingly being used in drug discovery and development process ... market growth. In addition to this,heavy investments by key ... applications are also propelling market growth. Browse 113 market ...
Breaking Biology Technology:Advocates Cheer Senate Leaders for Introducing Bipartisan Bill to Increase Number of Rare Disease Treatments 2Sun Health Foundation Provides $3.25M to Expand, Relocate Banner Del E. Webb Medical Center Pharmacy 2Sun Health Foundation Provides $3.25M to Expand, Relocate Banner Del E. Webb Medical Center Pharmacy 3Veracyte Presents Preliminary Data Demonstrating Ability of Molecular Classifier to Improve Non-Surgical IPF Diagnosis Using Bronchoscopy Samples 2Veracyte Presents Preliminary Data Demonstrating Ability of Molecular Classifier to Improve Non-Surgical IPF Diagnosis Using Bronchoscopy Samples 3Veracyte Presents Preliminary Data Demonstrating Ability of Molecular Classifier to Improve Non-Surgical IPF Diagnosis Using Bronchoscopy Samples 4Veracyte Presents Preliminary Data Demonstrating Ability of Molecular Classifier to Improve Non-Surgical IPF Diagnosis Using Bronchoscopy Samples 5Genotyping Market Growing at 22.3% CAGR to 2020: Research Based on Technology, Applications, Opportunities, Challenges and Key Players. 2Genotyping Market Growing at 22.3% CAGR to 2020: Research Based on Technology, Applications, Opportunities, Challenges and Key Players. 3Genotyping Market Growing at 22.3% CAGR to 2020: Research Based on Technology, Applications, Opportunities, Challenges and Key Players. 4Genotyping Market Growing at 22.3% CAGR to 2020: Research Based on Technology, Applications, Opportunities, Challenges and Key Players. 5
... you're really feeling like a salary increase should be coming ... great argument for your boss to get him on board ... tight and your boss is pre-disposed (or programmed after several ... discount most pay-me-more arguments. , ,So how can you create ...
... Wis. Donato Diorio would like to toss the ... bin occupied by buttonhooks and buggy whips. , ,What's more, ... might have just the silver bullet to do it. Using ... a salesperson looking for leads within a target company ...
... Wis. Paragon Development Systems (PDS) has ... its presence in Madison into a new building. , ,The ... designs, builds and manages IT infrastructure and services for ... president of IT infrastructure services, is responsible for restructuring his ...
Cached Biology Technology:Want a raise? Ten best midwest tech salary-increase pitches 2Want a raise? Ten best midwest tech salary-increase pitches 3Want a raise? Ten best midwest tech salary-increase pitches 4Want a raise? Ten best midwest tech salary-increase pitches 5Broadlook narrows search for sales leads with software 2Broadlook narrows search for sales leads with software 3
Without sodium bicarbonate. Sterile, Cell culture tested...
... Bioactive peptides are molecules of peptidic nature ... or activity which can be developed at ... and agro-food applications. In this way it ... superior properties for therapeutic applications. Primm offers ...
... a fluorescence scanner with 1 or 2 ... Protein, CGH, ) spotted on standard slides ... InnoScan700 scanners include three different models:, ... simultaneous dual fluorescence scanner (635nm and 532nm). ...
... Neurotransmitters are stored within neurons in ... concentrated in the synaptic bouton. ... isolated from other cellular debris. ... proposed in many pathological condtions. ...
Biology Products: