High Pitch Noise Hurting My Ears

BrianMSmith · 10-26-2011, 05:18 PM

On a very smooth road going 30-40mph (not frequently) I can hear a faint high pitch sound from the rear, can't tell if it corellates with throttle - if it does, and it gets louder over time, then it's likley the rear diff. If not, then it can be the fuel pump. It can also be wind noise, do you notice it at certain speeds? Bearings tend to make a growling noise.

ImportConvert · 10-26-2011, 09:31 PM

Quote:

Originally Posted by BrianMSmith

On a very smooth road going 30-40mph (not frequently) I can hear a faint high pitch sound from the rear, can't tell if it corellates with throttle - if it does, and it gets louder over time, then it's likley the rear diff. If not, then it can be the fuel pump. It can also be wind noise, do you notice it at certain speeds? Bearings tend to make a growling noise.

People say this, but in my experience they make a "warbling" whine to a shrill whine that is load-dependent, modified by accel/decel and loading/unloading in corners.

TypeOne · 10-27-2011, 03:57 PM

I noticed a noise after I put my head unit in. I think it is some interference with the antenna or something. Can't really tell once the car is running.

ImportConvert · 10-26-2011, 09:30 PM

I have ridden in one 370Z, and driven a few. I have no clue what you guys are talking about and I have heard plenty of wheel-bearings/diffs that are a bit "off". I heard nothing of the sort in any of the 370'z.

kenchan · 10-27-2011, 04:17 PM

i know what sarah is saying. it's a very audible high pitch sound. like when you turn on a old CRT TV. the car i test drove first had it and i was joking about it to the sales guy. he said he couldn't hear it. it might be because he was sitting in the passenger seat and the noise is audible in certain areas in the car.

the car i bought did not have this sound when i test drove it...and to this day does not have it. i think there was a TSB out for this. do a search.

brucelidat · 12-14-2011, 12:38 PM

I haven't noticed any high pitched frequency at all

kenchan · 12-14-2011, 03:40 PM

it's only on certain cars. mine does not have it but the other car i test drove the same day had the high pitched CRT TV tone.

slongholio · 12-14-2011, 03:44 PM

haven't heard it yet, but my droid has a frequency analyzer app downloaded on it. good way to check it out/prove it to the dealer if necessary.

m4a1mustang · 12-14-2011, 03:45 PM

Quote:

Originally Posted by slongholio

haven't heard it yet, but my droid has a frequency analyzer app downloaded on it. good way to check it out/prove it to the dealer if necessary.

You have a 2011 so you shouldn't ever encounter it.

kenchan · 12-14-2011, 03:46 PM

Quote:

Originally Posted by slongholio

haven't heard it yet, but my droid has a frequency analyzer app downloaded on it. good way to check it out/prove it to the dealer if necessary.

those app version spectro-analyzers suck.

i know cause i have one in my droidx and it's only sort of okay. it will most likely not detect.

m4a1mustang · 12-14-2011, 03:44 PM

Yep. It only affects some of the '09s and maybe a few '10s. Mine had it bad.

Mike S. · 12-14-2011, 09:44 PM

Ill throw my .02 in. G37 owners (no shock there) have a similar problem. I have it in my car, an 09 G37x. It sounds like its comming through the speakers. I can only tell when the radio is off. It doest happen at idle, but a tiny bit of gas gets it to make the CRT Monitor type sound. Sound dosent really change pitch or tone with any higher rpms other than idle.

Sucks but i dont have the energy to fight with Infiniti.

UNKNOWN_370 · 12-14-2011, 11:42 PM

Quote:

Originally Posted by natenyc123

Took my baby back to the dealer and said I don't want it back until its fixed. The dealer rejected my claim of a high pitched noise coming from the back of the car that is so hard to hear but actually hurts your ears. My girlfriend complained too about this to me. Went back again ..and now the dealer says i'm right and all the cards in the lot have this problem. The service guy said it sounds like a bad fuel pump that puts out this high frequency noise...what is the deal..

..anyone heard this before. Is this a factory problem? Thanks in advance.

btw...i put in stillen generation 3 intakes and she sounds real throaty now..and a little faster...2nd gear burns nice rubber when I bang it down and take off.

Wow you can hear my mother-in-Law in DC? I don't think nissan has enough sound deadening to fix her screaching high pitched noise.

12-14-2011, 12:38 PM	#6 (permalink)
brucelidat A True Z Fanatic Join Date: Jun 2011 Location: temple city, ca Posts: 2,432 Drives: 2011 370z 7AT GM Sp Rep Power: 32	I haven't noticed any high pitched frequency at all __________________ Works Emotion CR Ultimate - FI CBE w/ 18" resonators - Ecutek - eibach sways - Quaife - FI LTH w/race cats - kw v3 - spl - Topgunz SC - 488whp 398trq

12-14-2011, 03:44 PM	#11 (permalink)
m4a1mustang A True Z Fanatic Join Date: Feb 2009 Location: Northern VA Posts: 55,385 Drives: on two wheels Rep Power: 6963	Yep. It only affects some of the '09s and maybe a few '10s. Mine had it bad. __________________ - Steve Zs & Coffee - Saturdays at 10AM in Fairfax, VA and Columbia, MD (Click the banner!) LIKE us on Facebook!

12-14-2011, 09:44 PM	#12 (permalink)
Mike S. Base Member Join Date: Aug 2010 Location: Buffalo Posts: 19 Drives: 09 G37xS Rep Power: 15	Ill throw my .02 in. G37 owners (no shock there) have a similar problem. I have it in my car, an 09 G37x. It sounds like its comming through the speakers. I can only tell when the radio is off. It doest happen at idle, but a tiny bit of gas gets it to make the CRT Monitor type sound. Sound dosent really change pitch or tone with any higher rpms other than idle. Sucks but i dont have the energy to fight with Infiniti. Last edited by Mike S.; 12-14-2011 at 10:14 PM.

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10-26-2011, 05:18 PM	#1 (permalink)
BrianMSmith Enthusiast Member Join Date: Dec 2009 Location: secret Posts: 267 Drives: 370Z, Ducati 748S Rep Power: 16	On a very smooth road going 30-40mph (not frequently) I can hear a faint high pitch sound from the rear, can't tell if it corellates with throttle - if it does, and it gets louder over time, then it's likley the rear diff. If not, then it can be the fuel pump. It can also be wind noise, do you notice it at certain speeds? Bearings tend to make a growling noise.

10-27-2011, 03:57 PM	#3 (permalink)
TypeOne A True Z Fanatic Join Date: Jul 2010 Location: Baton Rouge, LA Posts: 2,682 Drives: BSM 370 Rep Power: 1852	I noticed a noise after I put my head unit in. I think it is some interference with the antenna or something. Can't really tell once the car is running.

10-26-2011, 09:30 PM	#4 (permalink)
ImportConvert A True Z Fanatic Join Date: Jun 2010 Location: SWMO Posts: 4,454 Drives: 2019 CX5 GT Reserve Rep Power: 7628	I have ridden in one 370Z, and driven a few. I have no clue what you guys are talking about and I have heard plenty of wheel-bearings/diffs that are a bit "off". I heard nothing of the sort in any of the 370'z.

10-27-2011, 04:17 PM	#5 (permalink)
kenchan A True Z Fanatic Join Date: Aug 2009 Location: N/A Posts: 76,801 Drives: N/A Rep Power: 141521	i know what sarah is saying. it's a very audible high pitch sound. like when you turn on a old CRT TV. the car i test drove first had it and i was joking about it to the sales guy. he said he couldn't hear it. it might be because he was sitting in the passenger seat and the noise is audible in certain areas in the car. the car i bought did not have this sound when i test drove it...and to this day does not have it. i think there was a TSB out for this. do a search.

12-14-2011, 03:40 PM	#7 (permalink)
kenchan A True Z Fanatic Join Date: Aug 2009 Location: N/A Posts: 76,801 Drives: N/A Rep Power: 141521	it's only on certain cars. mine does not have it but the other car i test drove the same day had the high pitched CRT TV tone.

12-14-2011, 03:44 PM	#8 (permalink)
slongholio Base Member Join Date: Sep 2009 Location: Charlotte Posts: 41 Drives: 2011 370z AT Red Rep Power: 16	haven't heard it yet, but my droid has a frequency analyzer app downloaded on it. good way to check it out/prove it to the dealer if necessary.