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Any success with sound reduction?

 
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digidocs



Joined: 04 Dec 2013
Posts: 32

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

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: 2752

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

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: 1115
Location: Sun Lakes AZ

PostPosted: Fri Jun 29, 2018 6:58 pm    Post subject: Any success with sound reduction? Reply with 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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Lenny Iszak



Joined: 23 Mar 2008
Posts: 246

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

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 - 400 hrs
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Kelly McMullen



Joined: 16 Apr 2008
Posts: 1115
Location: Sun Lakes AZ

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

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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-List" rel="noreferrer" target="_blank">http://www.matronics.com/Navigator?RV10-List
====================================
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eferrer" target="_blank">http://forums.matronics.com
====================================
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errer" target="_blank">http://wiki.matronics.com
====================================
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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
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digidocs



Joined: 04 Dec 2013
Posts: 32

PostPosted: Fri Jun 29, 2018 11:58 pm    Post subject: Any success with sound reduction? Reply with 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 (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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===========








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Kellym



Joined: 10 Jan 2006
Posts: 1527
Location: Sun Lakes AZ

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

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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target="_blank">http://www.matronics.com/
<http://www.matronics.com/>Navigator?RV10-List
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eferrer" target="_blank">http://forums.matronics.com
<http://forums.matronics.com>
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errer" target="_blank">http://wiki.matronics.com
<http://wiki.matronics.com>
===========
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<http://www.matronics.com/>contribution
===========







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