Navigation Links
Earphones 'potentially as dangerous as noise from jet engines,' according to new study
Date:8/29/2012

Turning the volume up too high on your headphones can damage the coating of nerve cells, leading to temporary deafness; scientists from the University of Leicester have shown for the first time.

Earphones or headphones on personal music players can reach noise levels similar to those of jet engines, the researchers said.

Noises louder than 110 decibels are known to cause hearing problems such as temporary deafness and tinnitus (ringing in the ears), but the University of Leicester study is the first time the underlying cell damage has been observed.

The study has been published in the Proceedings of the National Academy of Sciences.

University of Leicester researcher Dr Martine Hamann of the Department of Cell Physiology and Pharmacology, who led the study, said:

"The research allows us to understand the pathway from exposure to loud noises to hearing loss. Dissecting the cellular mechanisms underlying this condition is likely to bring a very significant healthcare benefit to a wide population. The work will help prevention as well as progression into finding appropriate cures for hearing loss."

Nerve cells that carry electrical signals from the ears to the brain have a coating called the myelin sheath, which helps the electrical signals travel along the cell. Exposure to loud noises - i.e. noise over 110 decibels - can strip the cells of this coating, disrupting the electrical signals. This means the nerves can no longer efficiently transmit information from the ears to the brain.

However, the coating surrounding the nerve cells can reform, letting the cells function again as normal. This means hearing loss can be temporary, and full hearing can return, the researchers said.

Dr Hamann explained: "We now understand why hearing loss can be reversible in certain cases. We showed that the sheath around the auditory nerve is lost in about half of the cells we looked at, a bit like stripping the electrical cable linking an amplifier to the loudspeaker. The effect is reversible and after three months, hearing has recovered and so has the sheath around the auditory nerve."

The findings are part of ongoing research into the effects of loud noises on a part of the brain called the dorsal cochlear nucleus, the relay that carries signals from nerve cells in the ear to the parts of the brain that decode and make sense of sounds. The team has already shown that damage to cells in this area can cause tinnitus - the sensation of 'phantom sounds' such as buzzing or ringing.


'/>"/>

Contact: Martine Hamann
mh86@le.ac.uk
University of Leicester
Source:Eurekalert  

Related medicine news :

1. ACR: Medical imaging study in health affairs incomplete and potentially misleading
2. Dangerous experiment in fetal engineering
3. Dangerous caregivers for elderly
4. Dangerous Rage May Be Common Among U.S. Teens
5. New iTeen365 White Paper Identifies Dangerous Driving Distractions – Offers Solutions for Parents of Teen Drivers
6. U.S. Blood Supply at Dangerously Low Levels: Red Cross
7. Blood test for pregnant women could predict risk of having dangerously small babies
8. Prenatal exposure to pollution especially dangerous for children with asthma
9. Young Risk-Takers Drawn to Dangerous Choking Game
10. PaleoMeal Organic Whey Protein Formula Improved According to Rockwell Nutrition
11. Preventing or better managing diabetes may prevent cognitive decline, according to UCSF study
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
Earphones 'potentially as dangerous as noise from jet engines,' according to new study
(Date:10/13/2017)... ... , ... The Visiting Nurse Association (VNA) of Somerset Hills is proud to ... unique items from across the nation, this holiday-themed event will raise funds and awareness ... VNA. The boutique will be open Saturday, November 4 (10:00 a.m. – 5:00 ...
(Date:10/13/2017)... , ... October 13, 2017 , ... Yisrayl Hawkins, Pastor ... that explains one of the most popular and least understood books in the Holy ... and puzzling descriptions that have baffled scholars for centuries. Many have tossed it off ...
(Date:10/13/2017)... ... ... Journey: From the Mountains to the Mission Field”: the story of a missionary couple ... From the Mountains to the Mission Field” is the creation of published author, Carole ... and currently teaches a class of ladies at her church, which she has taught ...
(Date:10/12/2017)... San Francisco, CA (PRWEB) , ... October 12, ... ... and Dr. Cheng, are now treating sleep apnea using cutting-edge Oventus ... sleep apnea, a serious sleep disorder characterized by frequent cessation in breathing. Oral ...
(Date:10/12/2017)... ... October 12, 2017 , ... IsoComforter, Inc. ( https://isocomforter.com ... the introduction of an innovative new design of the shoulder pad. The shoulder ... maximum comfort while controlling your pain while using cold therapy. By utilizing ice and ...
Breaking Medicine News(10 mins):
(Date:10/4/2017)...  South Korean-based healthcare product Development Company I.M. Lab ... Kickstarter. The device will educate the user about ,proper, ... efficiency compared to the dated and pricey CPR training ... of the compression for a more informed CPR training. ... raise $5,000. cprCUBE ...
(Date:10/2/2017)... Mich. , Oct. 2, 2017 Diplomat ... 8th Day Software and Consulting, LLC , and ... 8th Day Software, based in Tennessee ... LLC. 8th Day expands EnvoyHealth,s service offerings for health ... development. "In an ...
(Date:10/2/2017)... , Oct. 2, 2017 Halo Labs announces the European ... system called the HORIZON at MIBio 2017 in Cambridge, ... and visible particulate matter in biopharmaceutical samples with unprecedented speed and ... the novel technique Backgrounded Membrane Imaging. ... The HORIZON subvisible particle analysis system ...
Breaking Medicine Technology: