Log In

Come Join Us!

Are you an
Engineering professional?
Join Eng-Tips Forums!
  • Talk With Other Members
  • Be Notified Of Responses
    To Your Posts
  • Keyword Search
  • One-Click Access To Your
    Favorite Forums
  • Automated Signatures
    On Your Posts
  • Best Of All, It's Free!
  • Students Click Here

*Eng-Tips's functionality depends on members receiving e-mail. By joining you are opting in to receive e-mail.

Posting Guidelines

Promoting, selling, recruiting, coursework and thesis posting is forbidden.

Students Click Here


Vehicle Interior Noise

Vehicle Interior Noise

Vehicle Interior Noise

Hi there..
I am undertaking a project about the vehicle interior noise from the structure vibration point of view. I have searched the internet to find as many related information about this topic as i can but no luck. Could you please help me in this issue to guide me for the best websites in the internet and ppl that are willing to help me in this issue. I would be so pleased if you could provide me with such information.


RE: Vehicle Interior Noise

Helpful phrases for your websearch:

Boundary Element Modelling

Statistical Energy Analysis

Acoustic coupling

radiation efficiency

But I doubt you'll find much of any depth, unless there's some academic stuff out there.

It's a pretty big field - what are you really interested in?


Greg Locock

RE: Vehicle Interior Noise

Thx for your help
What i am interested in the vehicle internal noise due to the coupling effect or in a simple way the structural vibration of the panel

is that of any help to u so u can lead me more

RE: Vehicle Interior Noise

What frequency range are you interested in? At low frequency (<100 Hz) we use an FE model of the acoustic cavity coupled to the FE model of the structure. At higher frequencies we don't use analytical techniques, we use SEA or equivalent, and this doen't work well below 500 Hz.

Most vehicle noise that bothers the customer lies in the range 60-300 Hz, therefore we have a lot of noise problems that are not modellable.


Greg Locock


Greg Locock

RE: Vehicle Interior Noise

Hi GregLocock
Thx for your help..
My interest is the low frequency (0-200 Hz) due to the coupling effect of the vibrating panels .. and how they can be reduced. It seems that u r working in a motor company in the NVH section .. So could u please tell me how the FEM being used and implemented in the car and r u using any passive and active control to reduce the noise in the passenger compartment.

Thx alot

RE: Vehicle Interior Noise

We don't use active control, although I have worked on active noise control a long time ago. Therefore we use passive techniques - mostly via noise path analysis.

CAE NVH use FEA models of every major component in the car which are used to feed into VSIGN, which assembles the various components via their mountings, and allows us to put frequency dependent representations of the bushes and forcing functions and so on into the assembly. The resulting vibrations are used to drive an abstracted version of the acoustic cavity, and so give us an estimate of the noise at the occupant's ears.  


Greg Locock

RE: Vehicle Interior Noise

Hi spirit

I need the data sheet of all vehicles noise level, If any can give clue on this


RE: Vehicle Interior Noise

You won't find many people giving good data away - typical NVH data costs several hundred dollars per hour, and is often commercially sensitive.

It's a pretty all encompassing question. What do you actually want? spectra? overall noise levels? what sort of operating conditions? Internal or external? what microphone position? What sort of vehicle? Do you want to be able to publish the data?

Take a look at www.prosig.com and find the power steering pump noise example - that shows typical data for one problem.


Greg Locock

RE: Vehicle Interior Noise

You might look to the proceedings of the various SAE Noise and Vibration Conferences,  held every two years in Traverse City, Mich.  The '01 Conference papers are all available on CD-ROM and contain a wealth of useful information.  Try www.SAE.org
Anything more specific is likely to be proprietary information that will not be available.

Red Flag This Post

Please let us know here why this post is inappropriate. Reasons such as off-topic, duplicates, flames, illegal, vulgar, or students posting their homework.

Red Flag Submitted

Thank you for helping keep Eng-Tips Forums free from inappropriate posts.
The Eng-Tips staff will check this out and take appropriate action.

Reply To This Thread

Posting in the Eng-Tips forums is a member-only feature.

Click Here to join Eng-Tips and talk with other members! Already a Member? Login


White Paper - A Guide to 3D Printing Materials
When it comes to using an FDM 3D printer effectively and efficiently, choosing the right material at the right time is essential. This 3D Printing Materials Guide will help give you and your team a basic understanding of some FDM 3D printing polymers and composites, their strengths and weaknesses, and when to use them. Download Now

Close Box

Join Eng-Tips® Today!

Join your peers on the Internet's largest technical engineering professional community.
It's easy to join and it's free.

Here's Why Members Love Eng-Tips Forums:

Register now while it's still free!

Already a member? Close this window and log in.

Join Us             Close