Return-Path: Received: from mtain-dc11.r1000.mx.aol.com (mtain-dc11.r1000.mx.aol.com [172.29.64.139]) by air-db01.mail.aol.com (v129.4) with ESMTP id MAILINDB012-861b4c7e86b9196; Wed, 01 Sep 2010 13:00:41 -0400 Received: from post.thorcom.com (post.thorcom.com [193.82.116.20]) by mtain-dc11.r1000.mx.aol.com (Internet Inbound) with ESMTP id 6E28238000143; Wed, 1 Sep 2010 13:00:39 -0400 (EDT) Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1Oqqes-0003qt-6z for rs_out_1@blacksheep.org; Wed, 01 Sep 2010 17:59:34 +0100 Received: from [193.82.116.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1Oqqer-0003qk-Md for rsgb_lf_group@blacksheep.org; Wed, 01 Sep 2010 17:59:33 +0100 Received: from cavuit01.kulnet.kuleuven.be ([134.58.240.43]) by relay1.thorcom.net with esmtp (Exim 4.63) (envelope-from ) id 1Oqqem-0001ix-Go for rsgb_lf_group@blacksheep.org; Wed, 01 Sep 2010 17:59:33 +0100 Received: from smtps01.kuleuven.be (smtpshost01.kulnet.kuleuven.be [134.58.240.74]) by cavuit01.kulnet.kuleuven.be (Postfix) with ESMTP id E72447B804D for ; Wed, 1 Sep 2010 18:59:20 +0200 (CEST) Received: from ICTS-S-HUB-N3.luna.kuleuven.be (icts-s-hub-n3.luna.kuleuven.be [10.112.9.13]) by smtps01.kuleuven.be (Postfix) with ESMTP id D313331E705 for ; Wed, 1 Sep 2010 18:59:20 +0200 (CEST) Received: from ICTS-S-EXC2-CA.luna.kuleuven.be ([10.112.11.13]) by ICTS-S-HUB-N3.luna.kuleuven.be ([10.112.9.13]) with mapi; Wed, 1 Sep 2010 18:59:21 +0200 X-Kuleuven: This mail passed the K.U.Leuven mailcluster From: Rik Strobbe To: "rsgb_lf_group@blacksheep.org" Date: Wed, 1 Sep 2010 18:57:03 +0200 Thread-Topic: LF: VLF THOUGHT Thread-Index: ActJ8WPXn/Mk63YdQziIOhalmPktoQABU+ma Message-ID: References: <000a01cb493d$fb8f3410$0401a8c0@xphd97xgq27nyf><4C7E2046.536.2C4F91@v.d.heide.on-line.de> ,<002501cb49f0$acabccb0$0401a8c0@xphd97xgq27nyf> In-Reply-To: <002501cb49f0$acabccb0$0401a8c0@xphd97xgq27nyf> Accept-Language: nl-NL, nl-BE Content-Language: nl-BE X-MS-Has-Attach: X-MS-TNEF-Correlator: acceptlanguage: nl-NL, nl-BE MIME-Version: 1.0 X-KULeuven-Information: Katholieke Universiteit Leuven X-KULeuven-Scanned: Found to be clean X-KULeuven-Envelope-From: rik.strobbe@fys.kuleuven.be X-Spam-Score: 1.2 (+) X-Spam-Report: autolearn=disabled,HTML_MESSAGE=0.001,SUBJ_ALL_CAPS=1.166 Subject: RE: LF: VLF THOUGHT Content-Type: multipart/alternative; boundary="_000_BF4A524700075746A6467658DFC7102C63821D3C9EICTSSEXC2CAlu_" X-Spam-Checker-Version: SpamAssassin 2.63 (2004-01-11) on post.thorcom.com X-Spam-Level: X-Spam-Status: No, hits=0.8 required=5.0 tests=HTML_50_60,HTML_MESSAGE, SUBJ_ALL_CAPS,TO_ADDRESS_EQ_REAL autolearn=no version=2.63 X-SA-Exim-Scanned: Yes Sender: owner-rsgb_lf_group@blacksheep.org Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group X-SA-Exim-Rcpt-To: rs_out_1@blacksheep.org X-SA-Exim-Scanned: No; SAEximRunCond expanded to false x-aol-global-disposition: G x-aol-sid: 3039ac1d408b4c7e86b734a8 X-AOL-IP: 193.82.116.20 X-AOL-SPF: domain : blacksheep.org SPF : none X-Mailer: Unknown (No Version) --_000_BF4A524700075746A6467658DFC7102C63821D3C9EICTSSEXC2CAlu_ Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable > I am surprised that the high voltage 50 Hz electricity overhead distribu= tion network is not heard over great > distances by ear. Maybe because the 50Hz in the power grid is an electric (or in the best ca= se electromagnetic) signal and our ears are sensible to acoustic signals= ? 73, Rik ON7YD - OR7T --_000_BF4A524700075746A6467658DFC7102C63821D3C9EICTSSEXC2CAlu_ Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable
> I am surprised that the high vol= tage 50 Hz electricity overhead distribution network is not heard ove= r great
> = ;distances by ear.
 
Maybe because the 50Hz in the power grid is an electric (or in the be= st case electromagnetic) signal and our ears are sensible to acoustic= signals ?
 
73, Rik  ON7YD - OR7T
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