Robin
Posts: 1
Joined: Sat Jul 02, 2016 4:34 am

Sound-proofing

Sat Jul 02, 2016 4:43 am

I was going to buy the i3 but the interior noise when driving at 30mph - possibly the carbon fibre shell - has put me off.
Please invest in some really good sound-proofing.

MikeS
Posts: 713
Joined: Thu Jan 16, 2014 8:29 am
Location: Brighton UK

Re: Sound-proofing

Sat Jul 02, 2016 7:21 am

Mine is near silent and 30!
BMW 3 Series 2005 - Aug 2014
BMW Z4 35i 2009 - Mar 2014
BMW X1 Mar 14
BMW i3 Sep 14

jadnashuanh
Posts: 5154
Joined: Thu May 22, 2014 2:07 pm
Location: Nashua, NH USA

Re: Sound-proofing

Sat Jul 02, 2016 9:36 am

FWIW, I also think the car is quite quiet, but what can put people off is the limited road noise. Because there isn't the muted hum of an engine and exhaust, the noises the car does make become more obvious. When designing the car, the engineers were looking at ways to save grams...adding more noise suppression materials would add pounds. This is one reason why there aren't powered seats or a powered hatchback, among many other small things. I've only owned one car where I added sound-proofing to, an Infiniti M35, which while quiet at running around, the drone at speed was just terrible after a short while. Finally sold that car cause it bugged me too much.
Jim DeBruycker
2014 i3 BEV, 2021 X5 45e
(The i3 will be sold soon, <17K-miles, interested?)

bwilson4web
Posts: 765
Joined: Fri Apr 29, 2016 11:59 pm
Location: Huntsville, AL

Re: Sound-proofing

Sat Jul 02, 2016 6:19 pm

My Prius is quiet but the i3 is like a library with one exception.

I stopped while driving into a scattered rain shower, the ones that start with the sparse, 'big drops'. When stopped, the i3 sounded like being inside a bass drum. Once moving, no problem.

Bob Wilson
20k/27k mi 2014 BMW i3-REx
10k/10k mi 2017 Prius Prime

LCTRNZ
Posts: 3
Joined: Sat Dec 03, 2016 8:03 pm

Re: Sound-proofing

Sat Dec 03, 2016 8:11 pm

My i3 BEV is extremely quiet even at speeds in excess of 30mph. my 330i ZHP is not nearly as quiet. granted the hum of the exhaust is awesome, i cannot complain about the i3. I ordered the Harmon Kardon sound system, so perhaps the sweet sound of the speakers covers wind noise. Either way, I am quite impressed and pleased with the noise level.
2005 imola red 330i ZHP / 2017 protonic blue i3 BEV

epirali
Posts: 420
Joined: Sun May 24, 2015 7:05 am
Location: Maryland

Re: Sound-proofing

Sun Dec 04, 2016 7:21 am

Robin wrote:I was going to buy the i3 but the interior noise when driving at 30mph - possibly the carbon fibre shell - has put me off.
Please invest in some really good sound-proofing.
I am an audio engineer and incredibly sensitive to car and road noise. It is the one factor that will always keep me from buying a car (unless it is a track car). I hear no real road noise in the i3 except wind noise and that is really at speeds above 50 mph. In fact the car has no squeaks and rattle either and I can hear the light noise of the motor.

So what noise are you hearing? Was something wrong with the tires? Was this during a test drive? You should drive another one before deciding.

kc1
Posts: 63
Joined: Tue Apr 29, 2014 5:41 am
Location: London, UK

Re: Sound-proofing

Thu Dec 08, 2016 3:06 pm

@epirali are you seriously claiming that with your super sensitive professional ears you don't hear the motor whine (rather than light noise)? It's really noticeable in my wife's 16 Rex
BEV: Arravani, Loft, +Winter, Comfort, 428 wheels, Pro Media, HK, Auxiliary cabin heating, DA+, DC Rapid, LED lights, Sunroof, internet. Ordered May '14, Scheduled, Oct 14, Arrived Nov '14

jadnashuanh
Posts: 5154
Joined: Thu May 22, 2014 2:07 pm
Location: Nashua, NH USA

Re: Sound-proofing

Thu Dec 08, 2016 4:09 pm

I suppose it's possible that a unit's gear reduction pack is noisy, but while I think everyone can hear the whine of the motor at times, most do not consider it a show stopper. Considering that the motor tops out at somewhere near 14K RPM, and is tuning a set of gears, IMHO, it's pretty quiet and nothing like the roar of an ICE with all of its normal harmonics. One reason why you can hear the motor/gear train noise is because everything else is so quiet.
Jim DeBruycker
2014 i3 BEV, 2021 X5 45e
(The i3 will be sold soon, <17K-miles, interested?)

epirali
Posts: 420
Joined: Sun May 24, 2015 7:05 am
Location: Maryland

Re: Sound-proofing

Thu Dec 08, 2016 5:50 pm

kc1 wrote:@epirali are you seriously claiming that with your super sensitive professional ears you don't hear the motor whine (rather than light noise)? It's really noticeable in my wife's 16 Rex
I am seriously claiming that I hear no objectionable noise in my 15 i3 w/Rex. I hear the tires, the wind and the electric motor but they are all in the very quiet range of any car i have owned, electric or ICE.

Audis are among the most heavily sound proofed cars out there and the i3 is as quiet as my Audis in road noise and obviously quieter than the ICE even with good sound deadening.

So if your motor whine is louder than you ICE engine you may have an issue.

Update: I actually listened carefully again today on a cold day (40 F). The dominant noise in the car at 50-60 mph is definitely wind noise, and below it is the tires. At on speed do I hear anything but the faintest motor "whine" or noise inside the car with the windows rolled up.

Return to “Suggestions for BMW”