Return-Path: Received: from post.mail.nl.demon.net ([194.159.73.20]) by ns1.olsusa.com (Post.Office MTA v3.5.3 release 223 ID# 0-64832U3500L350S0V35) with ESMTP id com for ; Tue, 20 Jun 2000 18:06:39 -0400 Received: from [194.159.224.164] (helo=fpgcsxhi) by post.mail.nl.demon.net with smtp (Exim 3.14 #2) id 134WG6-0002K8-00; Tue, 20 Jun 2000 22:12:39 +0000 Date: Tue, 20 Jun 2000 23:45:52 +0200 To: "RWolf99@aol.com" , "lancair.list@olsusa.com" From: "colmar" Importance: medium Priority: normal Message-Id: <961537552-0-jones@colmar.demon.nl> Subject: Re[2]: Soundproofing - measurements in an undamped 320 X-Mailing-List: lancair.list@olsusa.com Mime-Version: 1.0 <<<<<<<<<<<<<<<<--->>>>>>>>>>>>>>>> << Lancair Builders' Mail List >> <<<<<<<<<<<<<<<<--->>>>>>>>>>>>>>>> >> I bought Bose headsets, but I had already installed insulation underneath the floor panel which supports the pedals, so that's the only insulation now. I recently measured the dbA at a few locations during typical cruise. In the leg area between shins - 107 dbA Around pilot head position - 102 to 103 dbA Behind the head (high up near the canopy/fuselage closure) - 100dbA Obvious conclusions;- 1. It's the engine, of course, nothing to do with air noise. 2. Buy noise cancellation headsets Regards, Colin Jones PH-COL >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> LML website: http://www.olsusa.com/Users/Mkaye/maillist.html LML Builders' Bookstore: http://www.buildersbooks.com/lancair Please send your photos and drawings to marvkaye@olsusa.com. >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>