X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from [216.52.245.18] (HELO ispwestemail2.mdeinc.com) by logan.com (CommuniGate Pro SMTP 4.3c5) with ESMTP id 938585 for flyrotary@lancaironline.net; Tue, 10 May 2005 09:24:50 -0400 Received-SPF: none receiver=logan.com; client-ip=216.52.245.18; envelope-from=wschertz@ispwest.com Received: from 7n7z201 (unverified [63.13.186.20]) by ispwestemail2.mdeinc.com (Vircom SMTPRS 4.1.361.0) with SMTP id for ; Tue, 10 May 2005 06:24:02 -0700 Message-ID: <004301c55563$82a87ad0$6401a8c0@7n7z201> From: "William" To: "Rotary motors in aircraft" References: Subject: Active noise reduction Date: Tue, 10 May 2005 08:23:51 -0500 MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0040_01C55539.991675D0" X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 6.00.2900.2180 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.2180 This is a multi-part message in MIME format. ------=_NextPart_000_0040_01C55539.991675D0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable MessageI think the new Honda Odessy uses this technique to take selected = sounds out of the cabin environment. Mark's comment is valid if = implemented that way. HOWEVER, there have been proponents of active noise reduction that = looked at putting the speakers near the exhaust to cancel the noise at = that point. The problems faced are as Ed mentioned somewhere -- high = temperature speaker components and a *mongo* audio driver. Bill Schertz KIS Cruiser # 4045 ----- Original Message -----=20 From: Mark R Steitle=20 To: Rotary motors in aircraft=20 Sent: Tuesday, May 10, 2005 7:34 AM Subject: [FlyRotary] Re: center rotor OFF Dave, Yeah, I can see it now. While you are enjoying a blissful, quiet = flight, the people and small animals nearby are bleeding from the ears. = That would be really bad for the rotary movement.=20 =20 Mark =20 -------------------------------------------------------------------------= ----- ------=_NextPart_000_0040_01C55539.991675D0 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Message=
I think the new Honda Odessy uses this = technique to=20 take selected sounds out of the cabin environment. Mark's comment is = valid if=20 implemented that way.
 
HOWEVER, there have been proponents of = active noise=20 reduction that looked at putting the speakers near the exhaust to cancel = the=20 noise at that point. The problems faced are as Ed mentioned somewhere -- = high=20 temperature speaker components and a *mongo* audio driver.
 
Bill Schertz
KIS Cruiser # 4045
----- Original Message -----
From:=20 Mark R Steitle =
Sent: Tuesday, May 10, 2005 = 7:34 AM
Subject: [FlyRotary] Re: center = rotor=20 OFF

Dave,

Yeah, I can = see it=20 now.  While you are enjoying a blissful, quiet flight, the people = and=20 small animals nearby are bleeding from the ears.  That would be = really=20 bad for the rotary movement.

 

Mark

 

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