Cabin Noise Reduction

Poosik · 10-16-2015, 05:49 PM

I didn't have access to a decibel meter, however subjectively there is reduction in road noise and increased stereo clarity. The interior feels "tomb" like now, but shortly ears readjust and start picking up on annoying sounds not heard before. For one a slight buzzing rattle in dash board. With the cold weather coming I'm expecting more little noises.
Cost approx. $100 (roadkill sound deadner)
weight- 50lbs

Persian Whisperjet · 10-16-2015, 07:54 PM

I'll tell you what *not* to do -- don't hog out your SCR. Turbo wheeeeeeee!!!!!

Poosik · 10-16-2015, 09:25 PM

too late!!

Yozh · 10-17-2015, 12:23 AM

I would rather hear all kinds of noises and rattles than add an extra 50 lbs to my car. This 335d is a fat pig as is.

Poosik · 10-17-2015, 08:46 AM

FAT indeed

Mik325tds · 10-17-2015, 08:58 AM

Interesting idea. I'm an audiophile, too. The car can't be quiet enough and every buzz annoys the hell out of me.
The buzz/rattle under the dash seems to be common on our cars. Check the lower frame mounting of the CIC/CCC.

mojobmw_e90 · 10-17-2015, 10:36 AM

I like to hear my turbos spool and my Bov to be heard. U want a quiet car buy a tesla or prius

Poosik · 10-17-2015, 01:50 PM

dude its not about the turbo whistle
its the annoying road/tire/dash/noises that aggravate.

Quasimodem · 10-17-2015, 02:13 PM

I keep wondering why my rear doors sound so hollow when closing them -- I forget that I put sound damping material in my front doors and they now sound pretty solid.

Chief Orman · 10-18-2015, 01:23 PM

Love the sound of my turbo. Hate creaks, squeeks, and other sounds that make me feel like my car is falling apart.

I got rid of my engine cover because it seems stupid and counter-productive to have the equivalent of a sweater on the engine when the temps under the hood are, in my view, too hot due to the twin turbo setup. That said, I can't say that I particularly love the sound of my car at idle (well actually I do kind of love it) and may consider doing some sound insulation.

I have read in other places that hood, but particularly the front doors, are the source of 50% of the interior noise. The mini cooper pages have a lot on sound insulation given the "bucket of beans" sound to those cars.

10-16-2015, 05:49 PM	#1
Poosik Private First Class 24 Rep 133 Posts Drives: BMW 335D Join Date: Jan 2014 Location: Connecticut iTrader: (0)	Cabin Noise Reduction I didn't have access to a decibel meter, however subjectively there is reduction in road noise and increased stereo clarity. The interior feels "tomb" like now, but shortly ears readjust and start picking up on annoying sounds not heard before. For one a slight buzzing rattle in dash board. With the cold weather coming I'm expecting more little noises. Cost approx. $100 (roadkill sound deadner) weight- 50lbs Attached Images
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10-16-2015, 07:54 PM	#2
Persian Whisperjet Kind of a Big Deal 171 Rep 857 Posts Drives: 2011 335d Join Date: Dec 2012 Location: Washington, D.C. iTrader: (0)	I'll tell you what not to do -- don't hog out your SCR. Turbo wheeeeeeee!!!!!
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10-16-2015, 09:25 PM	#3
Poosik Private First Class 24 Rep 133 Posts Drives: BMW 335D Join Date: Jan 2014 Location: Connecticut iTrader: (0)	too late!!
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10-17-2015, 12:23 AM	#4
Yozh Colonel 871 Rep 2,611 Posts Drives: 2011 335d M-Sport Join Date: Mar 2014 Location: Wet Coast iTrader: (4)	I would rather hear all kinds of noises and rattles than add an extra 50 lbs to my car. This 335d is a fat pig as is.
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10-17-2015, 08:46 AM	#5
Poosik Private First Class 24 Rep 133 Posts Drives: BMW 335D Join Date: Jan 2014 Location: Connecticut iTrader: (0)	FAT indeed
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10-17-2015, 08:58 AM	#6
Mik325tds Major 808 Rep 1,192 Posts Drives: 335d M-Sport Join Date: Jul 2014 Location: Greater Detroit iTrader: (0)	Interesting idea. I'm an audiophile, too. The car can't be quiet enough and every buzz annoys the hell out of me. The buzz/rattle under the dash seems to be common on our cars. Check the lower frame mounting of the CIC/CCC.
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10-17-2015, 10:36 AM	#7
mojobmw_e90 Major 382 Rep 1,497 Posts Drives: 2014 E63S Join Date: Oct 2014 Location: Chicago IL iTrader: (3)	I like to hear my turbos spool and my Bov to be heard. U want a quiet car buy a tesla or prius
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10-17-2015, 01:50 PM	#8
Poosik Private First Class 24 Rep 133 Posts Drives: BMW 335D Join Date: Jan 2014 Location: Connecticut iTrader: (0)	dude its not about the turbo whistle its the annoying road/tire/dash/noises that aggravate.
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10-17-2015, 02:13 PM	#9
Quasimodem Colonel 149 Rep 2,383 Posts Drives: 335d Join Date: Oct 2008 Location: California iTrader: (0) Garage List 2009 335d US [0.00]	I keep wondering why my rear doors sound so hollow when closing them -- I forget that I put sound damping material in my front doors and they now sound pretty solid. __________________ Speakers: CDT Audio HD-42 comps--front doors (RAAMmat deadened), CDT ES-06 6.5" woofers--kickpanl Pods, Hertz EBX202R dual 8" ported trunk sub. Amps: Phoenix Gold RSd 500.4 (comps & pods). PG RSd 600.1 (sub). Power & Ground: 4AWG Streetwires w/RockFosgt RFDB1 distro blocks. Input: HU lineout--Kicker KISL RCA adapters--RockFosgt RFIT-6 cables--Audiocontrol Matrix--Monster cables--RSd 500.4--lineout Monstr Cabl to RSd 600.1.
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10-18-2015, 01:23 PM	#10
Chief Orman Major 694 Rep 1,443 Posts Drives: 335D 2010 Join Date: Jun 2013 Location: East Bay, Nor Cal iTrader: (0)	Love the sound of my turbo. Hate creaks, squeeks, and other sounds that make me feel like my car is falling apart. I got rid of my engine cover because it seems stupid and counter-productive to have the equivalent of a sweater on the engine when the temps under the hood are, in my view, too hot due to the twin turbo setup. That said, I can't say that I particularly love the sound of my car at idle (well actually I do kind of love it) and may consider doing some sound insulation. I have read in other places that hood, but particularly the front doors, are the source of 50% of the interior noise. The mini cooper pages have a lot on sound insulation given the "bucket of beans" sound to those cars.
	Appreciate 0 Quote