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:1/24/2017)... (PRWEB) , ... January 24, 2017 , ... “Who Would Have Dreamed: A Novel of ... changed each woman who tried to understand its purpose in her life. “Who Would Have ... woman of powerful faith and a love of writing. , Sharon shares that ...
(Date:1/24/2017)... ... January 24, 2017 , ... “The Octagon of Spiritual Balances”: a guide ... is the creation of published author, Pastor Bernard J. Weathers, pastor of Word of ... degree in religious education and a master degree in theology. , ““The Octagon of ...
(Date:1/24/2017)... Raton, FL (PRWEB) , ... January 23, 2017 ... ... unique, highly refined coffee house-caliber protein and espresso drink, announced its CLICK® Coffee ... nutritional products. , CLICK® Coffee Protein Drink Mix has become popular among health-conscious ...
(Date:1/24/2017)... ... 2017 , ... United Nations Foundation President and CEO Kathy ... Policy, also known as the Global Gag Rule, last enacted in 2001. ... organizations from receiving any U.S. foreign assistance for family planning if they provide ...
(Date:1/24/2017)... (PRWEB) , ... January 23, 2017 , ... ... analyzed statistics from 140 Buzzies users who entered metrics into the product’s app. ... clinical data. The new data showed that within just 30 seconds of using ...
Breaking Medicine News(10 mins):
(Date:1/24/2017)... YORK , Jan. 23, 2017 ... long way from conventional syringes with vials to ... systems. These modern devices have become preferred devices ... for prefilled syringes has been rising strongly over ... healthcare facilities are now adopting this format for ...
(Date:1/24/2017)... CHICAGO , January 23, 2017 ... solutions for life sciences, announces agClinical 3.3, the latest ... release further enables life science organizations to confidently and ... monitoring and better manage the electronic trial master file ... ...
(Date:1/23/2017)... 2017 Consolidated Stability Storage is Leading to ... Testing Outsourcing Market This research service on the ... trends, and technologies, and provides a snapshot of the ... 2015 and forecasts are provided from 2016 to 2020. ... a CAGR of 9.4% till 2020, driven by an ...
Breaking Medicine Technology: