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Any success with sound reduction?

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digidocs

Joined: 04 Dec 2013
Posts: 59

Posted: Fri Jun 29, 2018 8:22 am Post subject: Any success with sound reduction?

Hi list,



Has anyone had success with sound reduction in the cockpit?  

At the moment, I'm experiencing 96-97dBA in cruise and 100+dBA at high power.  I've got good headsets, but I'd like to do better than this.  I am willing to spend a little money and weight.

At the moment, there's only carpet on the front and rear passenger floors.  All other surfaces are painted metal/fiberglass.  It seems like there's room for improvement, but I would love to hear the experience of anyone who's been there before.

Thanks!

David

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Tim Olson

Joined: 25 Jan 2007
Posts: 2879

Posted: Fri Jun 29, 2018 10:25 am Post subject: Any success with sound reduction?

Add some sort of fabric headliner and sidewall covering, for starters to reduce the echo chamber.

Tim



 	  Quote: 	
		   On Jun 29, 2018, at 11:19 AM, David Carr <junk(at)dcarr.org> wrote:

 

 Hi list,

 

 Has anyone had success with sound reduction in the cockpit?  

 

 At the moment, I'm experiencing 96-97dBA in cruise and 100+dBA at high power.  I've got good headsets, but I'd like to do better than this.  I am willing to spend a little money and weight.

 

 At the moment, there's only carpet on the front and rear passenger floors.  All other surfaces are painted metal/fiberglass.  It seems like there's room for improvement, but I would love to hear the experience of anyone who's been there before.

 

 Thanks!

 David

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Kelly McMullen

Joined: 16 Apr 2008
Posts: 1188
Location: Sun Lakes AZ

Posted: Fri Jun 29, 2018 6:58 pm Post subject: Any success with sound reduction?

I've taken no measurements, but I put super sound insulation http://www.aircraftspruce.com/catalog/appages/supersoundproofsheet.php

under the floorboards in front and rear footwells, up the sides of fuselage and under baggage compartment floor, as well as in the doors.



Did not use it on the firewall, went with higher temp material.



 	  Quote: 	
		  Sent from my IBM-360 main frame 	


 

On Fri, Jun 29, 2018 at 11:23 AM, Tim Olson <Tim(at)myrv10.com (Tim(at)myrv10.com)> wrote:

 	  Quote: 	
		  --> RV10-List message posted by: Tim Olson <Tim(at)MyRV10.com>

 

 Add some sort of fabric headliner and sidewall covering, for starters to reduce the echo chamber.

 Tim

 

 > On Jun 29, 2018, at 11:19 AM, David Carr <junk(at)dcarr.org (junk(at)dcarr.org)> wrote:

 > 

 > Hi list,

 > 

 > Has anyone had success with sound reduction in the cockpit?  

 > 

 > At the moment, I'm experiencing 96-97dBA in cruise and 100+dBA at high power.  I've got good headsets, but I'd like to do better than this.  I am willing to spend a little money and weight.

 > 

 > At the moment, there's only carpet on the front and rear passenger floors.  All other surfaces are painted metal/fiberglass.  It seems like there's room for improvement, but I would love to hear the experience of anyone who's been there before.

 > 

 > Thanks!

 > David

 

 

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KCHD

Lenny Iszak

Joined: 23 Mar 2008
Posts: 270

Posted: Fri Jun 29, 2018 7:22 pm Post subject: Any success with sound reduction?

A few years ago there was a guy with a boombox in a cooler at OSH. He closed that cooler and it got dead quiet. It was impressive. It cost a 1AU for the whole plane. I installed it under the floor boards, but then realized how flammable this stuff is. I’d rather take the noise than the toxic fumes. I would love to remove them all, but it’s not so easy now.

With a pair of Bose A20 (or Lightspeed Zulus) headsets you shouldn’t hear much of it…



Lenny



 	  Quote: 	
		   On Jun 29, 2018, at 12:19 PM, David Carr <junk(at)dcarr.org> wrote:

 

 Hi list,

 

 Has anyone had success with sound reduction in the cockpit?  

 

 At the moment, I'm experiencing 96-97dBA in cruise and 100+dBA at high power.  I've got good headsets, but I'd like to do better than this.  I am willing to spend a little money and weight.

 

 At the moment, there's only carpet on the front and rear passenger floors.  All other surfaces are painted metal/fiberglass.  It seems like there's room for improvement, but I would love to hear the experience of anyone who's been there before.

 

 Thanks!

 David

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_________________
Lenny Iszak
Palm City, FL
2014 RV-10, N311LZ - 500 hrs

Kelly McMullen

Joined: 16 Apr 2008
Posts: 1188
Location: Sun Lakes AZ

Posted: Fri Jun 29, 2018 8:11 pm Post subject: Any success with sound reduction?

That is why I chose the material I did. From catalog:  Has fire retardant qualities and meets FAR 25.853a Appendix F, Pt1.  



 	  Quote: 	
		  Sent from my IBM-360 main frame 	


 

On Fri, Jun 29, 2018 at 8:20 PM, Lenny Iszak <lenard(at)rapiddecision.com (lenard(at)rapiddecision.com)> wrote:

 	  Quote: 	
		  --> RV10-List message posted by: Lenny Iszak <lenard(at)rapiddecision.com (lenard(at)rapiddecision.com)>

 

 A few years ago there was a guy with a boombox in a cooler at OSH. He closed that cooler and it got dead quiet. It was impressive. It cost a 1AU for the whole plane. I installed it under the floor boards, but then realized how flammable this stuff is. I’d rather take the noise than the toxic fumes. I would love to remove them all, but it’s not so easy now.

 With a pair of Bose A20 (or Lightspeed Zulus) headsets you shouldn’t hear much of it…

 

 Lenny

 

 

 

 > On Jun 29, 2018, at 12:19 PM, David Carr <junk(at)dcarr.org (junk(at)dcarr.org)> wrote:

 > 

 > Hi list,

 > 

 > Has anyone had success with sound reduction in the cockpit?  

 > 

 > At the moment, I'm experiencing 96-97dBA in cruise and 100+dBA at high power.  I've got good headsets, but I'd like to do better than this.  I am willing to spend a little money and weight.

 > 

 > At the moment, there's only carpet on the front and rear passenger floors.  All other surfaces are painted metal/fiberglass.  It seems like there's room for improvement, but I would love to hear the experience of anyone who's been there before.

 > 

 > Thanks!

 > David

 

 

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  FORUMS -

 eferrer" target="_blank">http://forums.matronics.com

 ====================================

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 ====================================

 b Site -

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 rel="noreferrer" target="_blank">http://www.matronics.com/contribution

 ====================================

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_________________
Kelly McMullen
A&P/IA, EAA Tech Counselor
KCHD

digidocs

Joined: 04 Dec 2013
Posts: 59

Posted: Fri Jun 29, 2018 11:58 pm Post subject: Any success with sound reduction?

Hi Kelly,



What did you use on the firewall?

Thanks,

David

On Fri, Jun 29, 2018 at 9:56 PM, Kelly McMullen <apilot2(at)gmail.com (apilot2(at)gmail.com)> wrote:

 	  Quote: 	
		  I've taken no measurements, but I put super sound insulation http://www.aircraftspruce.com/catalog/appages/supersoundproofsheet.php

under the floorboards in front and rear footwells, up the sides of fuselage and under baggage compartment floor, as well as in the doors.



Did not use it on the firewall, went with higher temp material.



 	  Quote: 	
		  Sent from my IBM-360 main frame 	


 

On Fri, Jun 29, 2018 at 11:23 AM, Tim Olson <Tim(at)myrv10.com (Tim(at)myrv10.com)> wrote:

 	  Quote: 	
		  --> RV10-List message posted by: Tim Olson <Tim(at)MyRV10.com>

 

 Add some sort of fabric headliner and sidewall covering, for starters to reduce the echo chamber.

 Tim

 

 > On Jun 29, 2018, at 11:19 AM, David Carr <junk(at)dcarr.org (junk(at)dcarr.org)> wrote:

 > 

 > Hi list,

 > 

 > Has anyone had success with sound reduction in the cockpit?  

 > 

 > At the moment, I'm experiencing 96-97dBA in cruise and 100+dBA at high power.  I've got good headsets, but I'd like to do better than this.  I am willing to spend a little money and weight.

 > 

 > At the moment, there's only carpet on the front and rear passenger floors.  All other surfaces are painted metal/fiberglass.  It seems like there's room for improvement, but I would love to hear the experience of anyone who's been there before.

 > 

 > Thanks!

 > David

 

 

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 eferrer" target="_blank">http://forums.matronics.com

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Kellym

Joined: 10 Jan 2006
Posts: 1705
Location: Sun Lakes AZ

Posted: Sat Jun 30, 2018 4:16 am Post subject: Any success with sound reduction?

IIRC it was one of the fiberfrax varieties. No sound qualities.



On 6/30/2018 12:56 AM, David Carr wrote:

 	  Quote: 	
		   Hi Kelly,

 

 What did you use on the firewall?

 

 Thanks,

 David

 

 On Fri, Jun 29, 2018 at 9:56 PM, Kelly McMullen <apilot2(at)gmail.com 

 <mailto:apilot2(at)gmail.com>> wrote:

 

     I've taken no measurements, but I put super sound insulation

     http://www.aircraftspruce.com/catalog/appages/supersoundproofsheet.php

     <http://www.aircraftspruce.com/catalog/appages/supersoundproofsheet.php>

     under the floorboards in front and rear footwells, up the sides of

     fuselage and under baggage compartment floor, as well as in the doors.

     Did not use it on the firewall, went with higher temp material.

 

     Sent from my IBM-360 main frame

 

 

     On Fri, Jun 29, 2018 at 11:23 AM, Tim Olson <Tim(at)myrv10.com

     <mailto:Tim(at)myrv10.com>> wrote:

 

         

 

         Add some sort of fabric headliner and sidewall covering, for

         starters to reduce the echo chamber.

         Tim

 

         > On Jun 29, 2018, at 11:19 AM, David Carr <junk(at)dcarr.org <mailto:junk(at)dcarr.org>> wrote:

         > 

         > Hi list,

         > 

         > Has anyone had success with sound reduction in the cockpit?  

         > 

         > At the moment, I'm experiencing 96-97dBA in cruise and 100+dBA at high power.  I've got good headsets, but I'd like to do better than this.  I am willing to spend a little money and weight.

         > 

         > At the moment, there's only carpet on the front and rear passenger floors.  All other surfaces are painted metal/fiberglass.  It seems like there's room for improvement, but I would love to hear the experience of anyone who's been there before.

         > 

         > Thanks!

         > David

 

 

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         <http://wiki.matronics.com>

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         rel="noreferrer" target="_blank">http://www.matronics.com/

         <http://www.matronics.com/>contribution

         ===========

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_________________
Kelly McMullen
A&P/IA, EAA Tech Counselor # 5286
KCHD

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