Bats raise pitch of echolocation calls to avoid jamming</tile> <meta http-equiv="Content-Type" content="text/html; charset=utf-8"> <meta http-equiv="description" content="Bats raise pitch of echolocation calls to avoid jamming"> <meta http-equiv="keywords" content="Bats,raise,pitch,of,echolocation,calls,to,avoid,jamming"> </head> <body> <table width="100%" border="0" cellspacing="0" cellpadding="0"> <tr> <td width="10" height="39"> </td> <td width="99%" height="39"> <table width="100%" border="0" cellspacing="0" cellpadding="0"> <tr> <td width="16%"><a href="http://inttranews.inttra.net"><img src="http://inttranews.inttra.net/images/inttranews_grey_2.jpg" width="192" height="37" border="0"></a></td> <td width="50%" valign="middle"> <p><font face="Arial, Helvetica, sans-serif" size="2"><b><font color="#CCCCCC" face="Verdana, Arial, Helvetica, sans-serif" size="1">KNOW.<br> HOW.</font></b></font> </p> </td> <td width="34%" align="right" valign="top"><font face="Verdana, Arial, Helvetica, sans-serif" size="1" color="#666666">27-12-2006</font></td> </tr> </table> </td> </tr> <tr> <td width="10"> </td> <td width="99%" > </td> </tr> <tr> <td width="10"> </td> <td width="99%" > <table width="100%" border="0" cellspacing="0" cellpadding="0"> <tr> <td width="100%"><font face="Verdana, Arial, Helvetica, sans-serif" size="2"> <b>Bats raise pitch of echolocation calls to avoid jamming</b></font> </td> </tr> <tr> <td width="100%"> </td> </tr> <tr> <td width="100%"> <img src="http://inttranews.inttra.net/img_news/img_gR9GhaVjWrsQ1s8gV73g_0.jpg" align="left" vspace="5" hspace="5" ><font face="Verdana, Arial, Helvetica, sans-serif" size="2">London, UK (NewScientist): Bats can locate their prey using echolocation without confusion even when immersed in a thick swarm of many hundreds of other bats, and now researchers have discovered the secret. The winged mammals raise the pitch of their echolocation calls to make them stand out against "jamming signals". The finding helps explain how hundreds of bats can hunt in the same area without getting confused by others' calls, and could perhaps inform the design of better radar systems for aircraft. <br> <br>For more information, please visit: <br><a href="http://www.newscientist.com/article/dn10782?DCMP=NLC-nletter&nsref=dn10782 " target="blank">www.newscientist.com/article/dn10782?DCMP=NLC-nletter&nsref=dn10782 </a> <br></font></td> </tr> </table> </td></tr> </table> <script type="text/javascript"></script> <script type="text/javascript" src="<http://pagead2.googlesyndication.com/pagead/show