COTRAL International file on the effects of noise on the ear /title> <meta name="description" content="The constant acoustic load in our environment may result in hearing deficiencies from a very early age." /> <meta name="keywords" content="cotral international, cotral, international, laboratory cotral, laboratory, cotral, european leader, faq, find a question, forum, question, questions, protection, protections, hearing protection, hearing protections, personalized hearing protection, personalized hearing protections, customized hearing protection, customized hearing protections, cotral hearing protection, cotral hearing protections, moulded protections, moulded hearing protections, anti-noise hearing aids, moulded plugs, earplugs, anti-noise plugs, noise, plugs, ear, anti-noise, anti noise, moulded, plug, aids, moulded, hearing, personalised, customized, impression, cerumen, otitis, drains, comfort, definition, noise, intensity, frequency, duration, sound, measurement, sonometer, sonia, sound level, level, overall noise level, overall, noise, ear, external ear, middle ear, inner ear, auditory canal, effects, ear, noise"/> <meta name="Author" content="COTRAL International – the European leader in custom hearing protection" /> <meta name="robots" content="all" /> <meta http-equiv="language" content="en" /> <link rel="icon" type="image/png" href="../favicon.png" /> <link href="../style.css" rel="stylesheet" type="text/css" /> <script type="text/javascript" src="../fonctions.js"></script> </head> <body>  <div class="slogan">The complete hearing protection solution for professionals exposed to noise</div>   <table width="775" cellpadding="0" cellspacing="0" border="0" style="margin-left:auto; margin-right:auto"> <tr> <td height="95"><img src="../images/logoCotralInternational.jpg" alt="COTRAL International" /> <img src="../images/logo9001COFRAC.jpg" alt="Iso 9001 COFRAC" /> </td> <td width="120"><table width="100%" border="0" cellspacing="0" cellpadding="0"> <tr> <td class="navigTop"><a href="../index.php" class="bleuP">Home</a></td> </tr> <tr> <td class="navigTop"><a href="../sitemap.php" class="bleuP">Sitemap</a></td> </tr> <tr> <td class="navigTop"><a href="../howToGetThere.php" class="bleuP">How to get there</a></td> </tr> <tr> <td class="navigTop"><a href="../contactForm.php" class="bleuP">Contact us</a></td> </tr> <tr> <td height="10"></td> </tr> <tr> <th style="text-align:right"><a href="http://www.cotral.com" target="_blank">Français</a> | <a href="http://www.cotral.de" target="_blank">Deutsch</a> | <a href="http://www.cotral.be/index.php?lang=nl" target="_blank">Nederlands</a></th> </tr> </table></td> </tr> </table>   <script type="text/javascript">  </script> <table width="775" cellpadding="0" cellspacing="0" border="0" style="margin-left:auto; margin-right:auto"> <col width="165" /> <col width="125" /> <col width="100" /> <col width="90" /> <col width="90" /> <col width="105" /> <col width="100" /> <tr> <td class="top" onmouseover="affMenu('menu1',140); maskMenu('menu2'); maskMenu('menu3'); maskMenu('menu4'); maskMenu('menu5'); maskMenu('menu6'); maskMenu('menu7')" id="tmenu1"><a href="../productsServices/personalisedProtections.php" class="l_top">PRODUCTS AND SERVICES</a></td> <td class="top" onmouseover="affMenu('menu2',140); maskMenu('menu1'); maskMenu('menu3'); maskMenu('menu4'); maskMenu('menu5'); maskMenu('menu6'); maskMenu('menu7')" id="tmenu2"><a href="../laboratory/history.php" class="l_top">LABORATORY</a></td> <td class="top" onmouseover="affMenu('menu3',140); maskMenu('menu1'); maskMenu('menu2'); maskMenu('menu4'); maskMenu('menu5'); maskMenu('menu6'); maskMenu('menu7')" id="tmenu3"><a href="../news/diary.php" class="l_top">NEWS</a></td> <td class="top" onmouseover="affMenu('menu4',140); maskMenu('menu1'); maskMenu('menu2'); maskMenu('menu3'); maskMenu('menu5'); maskMenu('menu6'); maskMenu('menu7')" id="tmenu4"><a href="../files/definitionNoise.php" class="l_top">FILES</a></td> <td class="top" onmouseover="affMenu('menu5',140); maskMenu('menu1'); maskMenu('menu2'); maskMenu('menu3'); maskMenu('menu4'); maskMenu('menu6'); maskMenu('menu7')" id="tmenu5"><a href="../faq/Products.php" class="l_top">FAQ</a></td> <td class="top" onmouseover="affMenu('menu6',140); maskMenu('menu1'); maskMenu('menu2'); maskMenu('menu3'); maskMenu('menu4'); maskMenu('menu5'); maskMenu('menu7')" id="tmenu6"><a href="../presse/frenchPressReview.php" class="l_top">PRESS</a></td> <td class="top" onmouseover="affMenu('menu7',140); maskMenu('menu1'); maskMenu('menu2'); maskMenu('menu3'); maskMenu('menu4'); maskMenu('menu5'); maskMenu('menu6')" id="tmenu7"><a href="../download.php" class="l_top">DOWNLOAD</a></td> </tr> </table> <div id="menu1" style="position:absolute;visibility:hidden; width:100%"> <table width="775" cellpadding="0" cellspacing="0" border="0" style="margin-left:auto; margin-right:auto"> <col width="165" /> <col width="610" /> <tr> <td class="menuTop" style="border-bottom: 1px solid #FFFFFF;" onmouseover="this.style.backgroundColor='#FFFFFF'; this.firstChild.style.color='#1761AB'" onmouseout="this.style.backgroundColor='#1761AB'; this.firstChild.style.color='#FFFFFF'"><a href="../productsServices/personalisedProtections.php" class="menuTop">Personalised protections</a></td> <td rowspan="3"> </td> </tr> <tr> <td class="menuTop" style="border-bottom: 1px solid #FFFFFF;" onmouseover="this.style.backgroundColor='#FFFFFF'; this.firstChild.style.color='#1761AB'" onmouseout="this.style.backgroundColor='#1761AB'; this.firstChild.style.color='#FFFFFF'"><a href="../productsServices/customizedServices.php" class="menuTop">Customized services</a></td> </tr> <tr> <td class="menuTop" onmouseover="this.style.backgroundColor='#FFFFFF'; this.firstChild.style.color='#1761AB'" onmouseout="this.style.backgroundColor='#1761AB'; this.firstChild.style.color='#FFFFFF'"><a href="../productsServices/preventionNoiseRisk.php" class="menuTop">Awareness and training</a></td> </tr> </table> </div> <div id="menu2" style="position:absolute;visibility:hidden; width:100%"> <table width="775" cellpadding="0" cellspacing="0" border="0" style="margin-left:auto; margin-right:auto"> <col width="165" /> <col width="125" /> <col width="485" /> <tr> <td rowspan="6"> </td> <td class="menuTop" style="border-bottom: 1px solid #FFFFFF;" onmouseover="this.style.backgroundColor='#FFFFFF'; this.firstChild.style.color='#1761AB'" onmouseout="this.style.backgroundColor='#1761AB'; this.firstChild.style.color='#FFFFFF'"><a href="../laboratory/history.php" class="menuTop">History</a></td> <td rowspan="6"> </td> </tr> <tr> <td class="menuTop" style="border-bottom: 1px solid #FFFFFF;" onmouseover="this.style.backgroundColor='#FFFFFF'; this.firstChild.style.color='#1761AB'" onmouseout="this.style.backgroundColor='#1761AB'; this.firstChild.style.color='#FFFFFF'"><a href="../laboratory/organisation.php" class="menuTop">Organisation</a></td> </tr> <tr> <td class="menuTop" style="border-bottom: 1px solid #FFFFFF;" onmouseover="this.style.backgroundColor='#FFFFFF'; this.firstChild.style.color='#1761AB'" onmouseout="this.style.backgroundColor='#1761AB'; this.firstChild.style.color='#FFFFFF'"><a href="../laboratory/development.php" class="menuTop">Development</a></td> </tr> <tr> <td class="menuTop" style="border-bottom: 1px solid #FFFFFF;" onmouseover="this.style.backgroundColor='#FFFFFF'; this.firstChild.style.color='#1761AB'" onmouseout="this.style.backgroundColor='#1761AB'; this.firstChild.style.color='#FFFFFF'"><a href="../laboratory/references.php" class="menuTop">References</a></td> </tr> <tr> <td class="menuTop" style="border-bottom: 1px solid #FFFFFF;" onmouseover="this.style.backgroundColor='#FFFFFF'; this.firstChild.style.color='#1761AB'" onmouseout="this.style.backgroundColor='#1761AB'; this.firstChild.style.color='#FFFFFF'"><a href="../laboratory/cotralInternational.php" class="menuTop">COTRAL International</a></td> </tr> <tr> <td class="menuTop" onmouseover="this.style.backgroundColor='#FFFFFF'; this.firstChild.style.color='#1761AB'" onmouseout="this.style.backgroundColor='#1761AB'; this.firstChild.style.color='#FFFFFF'"><a href="../laboratory/photoAlbum.php" class="menuTop">Photo Album</a></td> </tr> </table> </div> <div id="menu3" style="position:absolute;visibility:hidden; width:100%"> <table width="775" cellpadding="0" cellspacing="0" border="0" style="margin-left:auto; margin-right:auto"> <col width="290" /> <col width="100" /> <col width="385" /> <tr> <td rowspan="4"> </td> <td class="menuTop" style="border-bottom: 1px solid #FFFFFF;" onmouseover="this.style.backgroundColor='#FFFFFF'; this.firstChild.style.color='#1761AB'" onmouseout="this.style.backgroundColor='#1761AB'; this.firstChild.style.color='#FFFFFF'"><a href="../news/diary.php" class="menuTop">Diary</a></td> <td rowspan="4"> </td> </tr> </table> </div> <div id="menu4" style="position:absolute;visibility:hidden; width:100%"> <table width="775" cellpadding="0" cellspacing="0" border="0" style="margin-left:auto; margin-right:auto"> <col width="390" /> <col width="90" /> <col width="295" /> <tr> <td rowspan="5"> </td> <td class="menuTop" style="border-bottom: 1px solid #FFFFFF;" onmouseover="this.style.backgroundColor='#FFFFFF'; this.firstChild.style.color='#1761AB'" onmouseout="this.style.backgroundColor='#1761AB'; this.firstChild.style.color='#FFFFFF'"><a href="../files/definitionNoise.php" class="menuTop">Noise</a></td> <td rowspan="5"> </td> </tr> <tr> <td class="menuTop" style="border-bottom: 1px solid #FFFFFF;" onmouseover="this.style.backgroundColor='#FFFFFF'; this.firstChild.style.color='#1761AB'" onmouseout="this.style.backgroundColor='#1761AB'; this.firstChild.style.color='#FFFFFF'"><a href="../files/ear.php" class="menuTop">Ear</a></td> </tr> <tr> <td class="menuTop" style="border-bottom: 1px solid #FFFFFF;" onmouseover="this.style.backgroundColor='#FFFFFF'; this.firstChild.style.color='#1761AB'" onmouseout="this.style.backgroundColor='#1761AB'; this.firstChild.style.color='#FFFFFF'"><a href="../files/effectsNoiseEar.php" class="menuTop">Noise and us</a></td> </tr> <tr> <td class="menuTop" onmouseover="this.style.backgroundColor='#FFFFFF'; this.firstChild.style.color='#1761AB'" onmouseout="this.style.backgroundColor='#1761AB'; this.firstChild.style.color='#FFFFFF'"><a href="../files/prevention.php" class="menuTop">Prevention</a></td> </tr> </table> </div> <div id="menu5" style="position:absolute;visibility:hidden; width:100%"> <table width="775" cellpadding="0" cellspacing="0" border="0" style="margin-left:auto; margin-right:auto"> <col width="480" /> <col width="90" /> <col width="205" /> <tr> <td rowspan="3"> </td> <td class="menuTop" style="border-bottom: 1px solid #FFFFFF;" onmouseover="this.style.backgroundColor='#FFFFFF'; this.firstChild.style.color='#1761AB'" onmouseout="this.style.backgroundColor='#1761AB'; this.firstChild.style.color='#FFFFFF'"><a href="../faq/Products.php" class="menuTop">Products</a></td> <td rowspan="3"> </td> </tr> <tr> <td class="menuTop" style="border-bottom: 1px solid #FFFFFF;" onmouseover="this.style.backgroundColor='#FFFFFF'; this.firstChild.style.color='#1761AB'" onmouseout="this.style.backgroundColor='#1761AB'; this.firstChild.style.color='#FFFFFF'"><a href="../faq/AfterSalesService.php" class="menuTop">After-sales service − Follow-up</a></td> </tr> <tr> <td class="menuTop" onmouseover="this.style.backgroundColor='#FFFFFF'; this.firstChild.style.color='#1761AB'" onmouseout="this.style.backgroundColor='#1761AB'; this.firstChild.style.color='#FFFFFF'"><a href="../faq/TipsTricks.php" class="menuTop">Tips & Tricks</a></td> </tr> </table> </div> <div id="menu6" style="position:absolute;visibility:hidden; width:100%"> <table width="775" cellpadding="0" cellspacing="0" border="0" style="margin-left:auto; margin-right:auto"> <col width="570" /> <col width="105" /> <col width="100" /> <tr> <td rowspan="2"> </td> <td class="menuTop" style="border-bottom: 1px solid #FFFFFF;" onmouseover="this.style.backgroundColor='#FFFFFF'; this.firstChild.style.color='#1761AB'" onmouseout="this.style.backgroundColor='#1761AB'; this.firstChild.style.color='#FFFFFF'"><a href="../presse/frenchPressReview.php" class="menuTop">French-speaking press review</a></td> <td rowspan="2"> </td> </tr> <tr> <td class="menuTop" onmouseover="this.style.backgroundColor='#FFFFFF'; this.firstChild.style.color='#1761AB'" onmouseout="this.style.backgroundColor='#1761AB'; this.firstChild.style.color='#FFFFFF'"><a href="../presse/internationalPressReview.php" class="menuTop">International press review</a></td> </tr> </table> </div> <div id="menu7" style="position:absolute;visibility:hidden"> </div>  <noscript>  <table width="775" cellpadding="0" cellspacing="0" border="0" style="border-top:1px solid #FFFFFF; margin-left:auto; margin-right:auto"> <col width="25%" /> <col width="25%" /> <col width="25%" /> <col width="25%" /> <tr> <td class="navigation"><a href="definitionNoise.php" class="navigation">Noise</a></td> <td class="navigation"><a href="ear.php" class="navigation">The ear</a></td> <td class="navigation"><a href="effectsNoiseEar.php" class="navigation">Noise and us</a></td> <td class="navigation"><a href="prevention.php" class="navigation">Prevention</a></td> </tr> </table> </noscript>   <table width="775" height="441" border="0" cellpadding="0" cellspacing="0" style="margin-left:auto; margin-right:auto"> <col width="195" /> <col width="*" /> <tr> <td class="position" colspan="2"> <a href="definitionNoise.php" class="yellow">Files</a> > <a href="#" class="yellow">Noise and us</a> > <a href="#" class="yellow">The effects of noise on the ear</a></td> </tr> <tr> <td valign="top"><img src="../images/img_doseffets.jpg" width="195" height="249" alt="Le bruit et nous" /> <table width="100%" cellpadding="3" cellspacing="0"> <tr> <td><a href="effectsNoiseEar.php" class="menu"style="color:#1761AB;font-weight:bold;">> Effects of noise on the ear</a></td> </tr> <tr> <td><a href="effectsNoiseBody.php" class="menu">> Effects of noise on the body</a></td> </tr> </table> </td> <td valign="top" class="bordure"><h1 class="titrePage">The effects of noise on the ear</h1> <p>The constant acoustic load in our environment may result in hearing deficiencies from a very early age. A hearing disorder may already occur at a constant noise level of 85 dB, which corresponds to the noise of a street with heavy traffic or the noise in a workshop.</p> <ul> <li><a href="effectsNoiseEar.php?txt=1" class="bleu">Why do we find it more difficult to hear?</a></li> <li><a href="effectsNoiseEar.php?txt=2" class="bleu">Auditory fatigue</a></li> <li><a href="effectsNoiseEar.php?txt=3" class="bleu">The types of deafness</a></li> </ul></td> </tr> </table>   <div style="width:775px;margin-left:auto; margin-right:auto; text-align:center"><p class="adresse">COTRAL International BP100 14110 CONDE SUR NOIREAU - Tél : +33 (0)2 31 69 36 36 - Fax : +33 (0)2 31 69 36 35</p> <p class="adresse">COTRAL International, Secrétariat commercial Bahnhofstrasse 52 CH-8001 ZÜRICH - Tél : +41 (0)44 214 67 24 - Fax : +41 (0)44 214 65 19</p> <p class="adresse">COTRAL International, Secrétariat commercial 8 Avenue des Arts B-1210 BRUXELLES - Tél : + 32 (0) 2 545 11 52 - Fax : +32 (0) 2 545 11 46</p> <p class="obligation"><a href="../protectionPersonnalData.php" class="cnil">Disclaimer</a></p></div>  <script type="text/javascript"> var gaJsHost = (("https:" == document.location.protocol) ? "https://ssl." : "http://www."); document.write(unescape("%3Cscript src='" + gaJsHost + "google-analytics.com/ga.js' type='text/javascript'%3E%3C/script%3E")); </script> <script type="text/javascript"> try { var pageTracker = _gat._getTracker("UA-12158028-4"); pageTracker._trackPageview(); } catch(err) {}</script></body> </html>