Navigation Links
Sound safety
Date:5/12/2011

s loud volumes seem lower than they really are," adds Gido, "potentially prompting the listener to turn up the volume even more." The ear drum, already shaken by the oscillations of the pressure chamber, is further impacted by the boosted volume.

The resulting physical strain, along with the repeated activation of the tiny muscles involved in the acoustic reflex, are what the researchers believe may lead to listener fatigue.

To counter the oscillations, Ambrose and his colleagues developed a way to use a membrane outside the ear drum to take the brunt of all the pounding. This "sacrificial membrane" disrupts the excessive pressure waves, protecting the ear drum and preventing the triggering of the acoustic reflex, ultimately leading to lower, safer listening volumes.

The papers describe two approaches for introducing the new technology. The simplest involves a retrofit that can be applied to existing in-ear headphones and builds upon earlier studies of hearing aids. For decades, audiologists have known that sealed ear canals create distracting side effects, such as the occlusion effect that causes one's voice to sound muffled. In years past, audiologists drilled small holes to alleviate the pressure; however, the holes also led to squealing feedback effects and diminished sound quality.

Ambrose discovered that stretching a thin film of medical-grade polymer over the pressure-alleviating hole reseals the environment, yet provides a sacrificial membrane to absorb the abusive pressures. Based on the conclusions of the recent papers, the membrane-hole modification appears to eliminate the overpressure effects that impact the users of many headphones, hearing aids and other devices.

For greater sound pressure reduction and potentially improved sound quality, Asius also developed a more advanced corrective device: a small, inflatable seal called an Ambrose Diaphonic Ear Lens (ADELTM). The ADELTM, which looks like a tiny ear-sealin
'/>"/>

Contact: Josh Chamot
jchamot@nsf.gov
703-292-7730
National Science Foundation
Source:Eurekalert  

Page: 1 2 3 4 5

Related medicine news :

1. New technology fuses MRI, ultrasound to achieve targeted biopsy of prostate cancer
2. Ultrasound combined with pre-operative MRI is cost effective in evaluating rotator cuff tears
3. Inner Ear Can Store Recent Sounds, Study Finds
4. High-volume portable music players may impair ability to clearly discriminate sounds
5. Sea grant awards more than $1.1 million for research under EPAs Long Island Sound study
6. Bedside ultrasound becomes a reality
7. That Squeaking Sound Might Come From Your New Hip
8. Look-and-Sound-Alike Names Account for Many Painkiller Prescription Errors
9. Microbubble ultrasound and breast biopsies
10. Ultrasound and a blood test can increase survival after myocardial infarction
11. AIUM announces ultrasound practice accreditation in fetal echocardiography
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
Sound safety 
(Date:4/23/2014)... research, published in the journal Oncotarget , ... different appearances or their own DNA signatures within ... difficult to design effective, targeted treatment strategies. , ... EGFR mutation and either the KRAS or BRAF ... by the EGFR gene mutation have that specific ...
(Date:4/23/2014)... has been a rapidly evolving pursuit with many ... in the research road, scientists have found a ... with the disease. The report, which appears in ... have important implications for developing novel treatments. , ... that for years, research has suggested a link ...
(Date:4/22/2014)... device has been shown to reduce seizures in patients ... When coupled with an innovative electrode placement planning system ... complete elimination of seizures in nearly half of the ... , That,s good news for a large portion of ... epilepsy whose seizures can,t be controlled with medications and ...
(Date:4/22/2014)... at UT Southwestern Medical Center are making breakthroughs that ... A team of physician-scientists at UT Southwestern has ... with natural anti-depressant properties) works inside the brain. Simultaneously, ... depression in the form of a neuroprotective drug known ... in April,s issue of Molecular Psychiatry, is ...
(Date:4/22/2014)... for Molecular Pathology (AMP) released a report today ... on recommendations for a molecular diagnostics curriculum at ... The report was prepared by the Medical Laboratory ... Training and Education Committee. "Our goal was to ... laboratory scientists appropriately in order to manage the ...
Breaking Medicine News(10 mins):Health News:Non-uniform genetic mutations identified in lung cancers could lead to targeted treatment 2Health News:Newly approved brain stimulator offers hope for individuals with uncontrolled epilepsy 2Health News:Depressed? Researchers identify new anti-depressant mechanisms, therapeutic approaches 2Health News:Depressed? Researchers identify new anti-depressant mechanisms, therapeutic approaches 3Health News:AMP publishes curriculum recommendations for medical laboratory scientists 2
... WEST PALM BEACH, Fla., Aug. 25 For years, millions ... pantyhose to cover up unsightly varicose and spider veins. Now there,s ... Garden of Life,s ( www.gardeno f life.com ... clinical studies and millions of happy European women. , , ...
... ORLEANS, Aug. 25 Over 102,000 Americans are ... and a Slidell, Louisiana resident is making the most of his ... for the 2010 Transplant Olympics, twittering his progress, and furthering his ... a unique and personal level of hope and understanding by caring ...
... Study Suggests Division, Ambivalence and Hesitancy to Change; Demographics ... Aug. 25 Americans lack confidence that healthcare reform will deliver ... released today by the Thomson Reuters. , , ... a wide range of issues including the cost and quality of ...
... ... the aging eye , ... Francisco, CA (Vocus) August 25, 2009 -- EyeCare America, a national non-profit organization that provides ... a healthy aging eye in honor of September,s Save Your Sight Month., , , , ...
... ... of Honolulu are celebrating the fifth anniversary of their successful partnership by holding an ... ... healthcare education company, and Kapi,olani Community College of Honolulu are celebrating the fifth anniversary ...
... ... honest and forthright look at why Americans are overweight, overwhelmed, and confused, and ... ... (PRWEB) August 25, 2009 -- The question is not whether Americans are getting ...
Cached Medicine News:Health News:Garden of Life Launches Lovely Legs(TM) to Reduce Visible Signs of Varicose and Spider Veins 2Health News:Double Recipient Twitters Transplant Olympic Training and Tackles Nursing School 2Health News:Thomson Reuters Survey: Americans Skeptical that Healthcare Reform Will Improve Quality or Affordability 2Health News:Thomson Reuters Survey: Americans Skeptical that Healthcare Reform Will Improve Quality or Affordability 3Health News:EyeCare America Promotes Healthy Aging Tips During September's Save Your Sight Month 2Health News:EyeCare America Promotes Healthy Aging Tips During September's Save Your Sight Month 3Health News:EyeCare America Promotes Healthy Aging Tips During September's Save Your Sight Month 4Health News:Career Step and Kapi'olani Community College Celebrate Five Year Partnership 2Health News:The Naked Truth: Overweight, Overwhelmed and Confused 2
(Date:1/15/2014)... Most osteoporosis patients want a choice in the medication ... by Mission Pharmacal Company. The survey, conducted by ... community, revealed that 74 percent of osteoporosis patients surveyed ... other than a pill or a tablet. ...
(Date:1/15/2014)... 15, 2014 AARP Foundation today announced it has established ... from the severe cold weather that has gripped much of ... those in need; so to support these emergency relief efforts ... $250,000, which could mean up to $500,000 in aid. The ...
(Date:1/15/2014)... THOUSAND OAKS, Calif. , Jan. 15, 2014 ... and Amgen (NASDAQ: AMGN ) announced ... to jointly discover and validate new therapeutic targets ... (IBD), a chronic disorder that affects millions worldwide. ...
Breaking Medicine Technology:Mission Pharmacal Conducts Online Survey of Osteoporosis Patients 2Mission Pharmacal Conducts Online Survey of Osteoporosis Patients 3AARP Foundation Establishes Winter Relief Fund for Older Adults Suffering from the Severe Cold Weather 2AARP Foundation Establishes Winter Relief Fund for Older Adults Suffering from the Severe Cold Weather 3Mass. General, Broad Institute and Amgen Will Work to Discover New Drugs for Inflammatory Bowel Disease 2Mass. General, Broad Institute and Amgen Will Work to Discover New Drugs for Inflammatory Bowel Disease 3Mass. General, Broad Institute and Amgen Will Work to Discover New Drugs for Inflammatory Bowel Disease 4
... Healthcare and,Laboratory Corporation of America(R) Holdings (LabCorp(R)) ... agreement to discuss future,possibilities to co-develop new ... diagnostics, metabolic syndrome, oncology and diabetes. Under ... new tests that,could make the biggest impact ...
... of the American Pain Society ... ... sustained pain relief from diabetic neuropathic pain (DNP),compared to placebo-treated patients, according ... (APS) in Tampa, Fla., "This is the first placebo-controlled trial of ...
Cached Medicine Technology:Siemens and LabCorp Enter Agreement to Co-Develop New Clinical Diagnostic Tests 2Siemens and LabCorp Enter Agreement to Co-Develop New Clinical Diagnostic Tests 3Siemens and LabCorp Enter Agreement to Co-Develop New Clinical Diagnostic Tests 4New Lacosamide Data Provides Evidence for Long-Term Efficacy in Diabetic Neuropathic Pain 2New Lacosamide Data Provides Evidence for Long-Term Efficacy in Diabetic Neuropathic Pain 3New Lacosamide Data Provides Evidence for Long-Term Efficacy in Diabetic Neuropathic Pain 4
A full function instrument at an economical price....
... The ophthalmoscope with superior aspherical optics. ... by means of the aspherical optical system ... Beta 200 allows you to view the ... retina even with a small pupil. Conventional ...
The world's first automatic computation program analyzes massive amount of measurement data and computes "the most comfortable value" for the patient....
... Rx Master is designed and ... reliable service and give the ... improve procedures. It embodies the ... want most, including accuracy, speed, ...
Medicine Products: