Objective analysis of cabin noise solutions

sonic370

finally some common sense reasoning.............

SeattleLion

These results are interesting but unfortunately not too helpful. We don't know what sort of road surface was involved or where the measurement was made. Assuming that the Edmunds results are consistent between cars, the touring Z was about 5 db louder than the Mercedes. That would be around 25% more noise.

What I was hoping we could do is get the difference in the same car of the noise level before and after sound treatment. With that data, members could compare solutions versus cost, etc. and decide what, if anything they want to do.

Rui Z

Actually, it is useful information. I'm sure edmunds used more professional equipment then an iphone app, so we need to compare their numbers to the decibel you get from an iphone app. If it's not close to the edmunds numbers, then that means there is alot of muffling going on with the iphone or whatever other device you are using. If there's too much muffling, you will not get an accurate measurement of noise level difference for before and after sound treatment.

Like I suggested before, you should look into what Nissan did as their road noise fix for the 2011 model.

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Rui Z

You should have bought a Mercedes C350!

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chuckd05

My brothers 350z is def much more quite inside.

It doesn't bother me at all but it's def not as loud inside while cruising or running over rocks.

The noise doesnt really bother me but I'm just stating a fact. I have no intentions of sound dampening material being installed but what the OP said makes sense.

He seems concerned so I think he should conduct his study and post his results.

My .02

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09 370Z 6M PW - FBO Best 1/4 mile = 12.926 @ 109 SOLD -- 08 BMW 135i - FBO 12.1@120mph SOLD -- white 09 e92 335 Coupe Mtech - 11.9 @ 119 :-)

butdamnbrian

wow, i'm actually pretty surprised at the response the OP is getting with this post. i'm pretty sure he was only trying to be helpful.

do i think the z is too noisy, or does the cabin noise bother me? no. is it much louder in the z's cabin than other cars that perform better than the z? yes. do i care? no. do some people care, and would they benefit from the OP's post? yes.

every car has strengths and faults; we all chose to accept the good with the bad when we bought the 370z. with that said, we're all here to improve our driving experiences as much as possible -> to me, that's what the tuner/enthusiast crowd is all about. for me, it's the clutch/transmission that can use work for our cars, and not the cabin noise. for other people, it's oil temps. for other people, it's the terrible base stereo or the bose system. fine, we all have gripes and we want to improve aspects of our driving experience. we still think the z is great.

so this guy has an issue with cabin noise. maybe he spoke too soon when he decided everyone else has the same issue, but he's only trying to crowd-source some helpful data and organize a thread to help other people collect data. then people s**t on him for that with snarky comments; it's disappointing to see that here.

save the sarcasm for retards who ask a question they can answer with the search button, yeah?

OP, go spend some time in the audio/video section and ask the same questions there... a lot of guys should have experience with this question and probably can give you some worthwhile feedback...

Guard Dad

Whenever the subject of cabin noise comes up the smart remarks are sure to follow. Some folks just can't resist putting people down if they have views that differ from their own.

Chriz

Because some views are just wrong to others
Some Z members may consider that threads like these bring upon a negative image towards the car, including myself. For me thats a valid reason to state my objection to said views. Besides there is already a thread for this on the same page.

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PW 7AT w/Sports Pkg
Hook Em!

kenchan

In my view you don't need a spl meter to do this and, remeber that mobile phone mics are caliberated to work for voice. The op just sounds like a a dorky iphone user.

EL Diablo

I'm on the "like it loud" side.

IMO - Sports cars should sound aggressive on the inside and out.

waaaasabi

I joke...
...albeit very poorly.

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That's SOOOO not Raven!

Ztoon

I covered the rear interior with Dynamat Xtreme.
Good results. It does a lot to rid the cabin of annoying road noise so that you're hearing more of just the engine sound.

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mengel

If you don't like the road noise, buy an exhaust, an intake and some high flow cats. Wont here the road noise over that...

ThoriumHotdog

Wow. I didn't expect these type of responses after reading the OP.

I'm pretty sure he was only suggesting this so people can find the best solution IF the noise bothers them. It's like putting your car on the dyno to test an exhaust. If someone finds a cheap solution that makes the obvious sports car noise level go down, would you guys really complain?

Anyway, OP, I suggest a standard place in the cabin to place the Iphone or device. The noise will vary from position to position.

chuckd05

Ill do this test if someone would like to buy me some dynomat.

on the real tho, even with an exhaust this car is just loud. my brothers 350z with test pipes and exhaust is much more quite inside.. when I take him in my car he always says how loud it is.. I am completely used to it but he isn't.. If I cruise at 50-75 mph even with the 4.08s its relatively silent still, but while accelerating and going speeds over 80, it gets a bit louder than I would like. But I am doing nothing to help it with test pipes, gears, and an exhaust system.

A buddy of mine has a 370z with a greddy exhaust, canister style with tit. tips and his car is OBNOXIOUSLY LOUD with test pipes. He comes in my car and tells me how quite it is..

It is what it is, i don't mind it at all... BUT some do, and all OP did was list how to test it... I thought he was going to have results to follow though. I like his concept he needs to try it out and post his results.. So get to it Mr. OP and report back.

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09 370Z 6M PW - FBO Best 1/4 mile = 12.926 @ 109 SOLD -- 08 BMW 135i - FBO 12.1@120mph SOLD -- white 09 e92 335 Coupe Mtech - 11.9 @ 119 :-)