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pwall192
New User
Nov 7, 2011, 11:33 PM
Post #1 of 5
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Car Noises database
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Does anyone know of a database of actual car noises? I'm thinking of working on one to make it easier for people to identify what their car problem is. Having trouble finding the audio data.
Thanks!
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Tom Greenleaf
Ultimate Carjunky
/ Moderator
Nov 8, 2011, 5:47 AM
Post #2 of 5
(3466 views)
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Re: Car Noises database
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YouTube or others have quite a few. Still hard with the best work. Describing noises is tricky at best. Being there is always the best.
Mechanic's stethoscope may help depending what type of noise and where,
T
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Discretesignals
Ultimate Carjunky
/ Moderator
Nov 8, 2011, 6:06 AM
Post #3 of 5
(3462 views)
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Re: Car Noises database
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While back GM dealerships had a tool called an EVA (Electronic vibration analyzer). I don't know if they still use it. The tool has a transducer that would measure minute pressure changes and it would give you a frequency and the order of a vibration/noise. The tool came with a chart that showed which parts of the car were capable of producing those different frequencies and orders. EVA and a timing light was also great for balancing drive line components.
Since we volunteer our time and knowledge, we ask for you to please follow up when a problem is resolved.
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pwall192
New User
Nov 8, 2011, 10:44 AM
Post #4 of 5
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Re: Car Noises database
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Hmm, sounds like the EVA is still a mess: link deleted....not allowed
Have you ever used one? Does it recognize the sound or just output a frequency that you have to match on the chart?
I'm thinking about going to a local technical college and seeing if I can work with them to start recording common sounds. Thoughts?
(This post was edited by Hammer Time on Nov 8, 2011, 12:02 PM)
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Discretesignals
Ultimate Carjunky
/ Moderator
Nov 8, 2011, 5:29 PM
Post #5 of 5
(3429 views)
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Re: Car Noises database
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I used it a couple of times working at the dealer. It was mainly used to prove to the service manager that a car under warranty needed a new tire when a customer came in for complaint of a vibration. You had to write down all the information from the EVA on the RO, so the dealer could meet GM's warranty hurdles.
It measures intensity/frequency/order of a vibration on what ever you stick the probe on. It didn't tell you what was causing the vibration or how it was traveling, but using the chart you could get a general idea what would cause a certain vibration. Used with a timing light, you could balance a driveshaft in the vehicle. I did play with that a few times also and it worked well.
You google "Electronic Vibration Analyzer", which I am sure you already have, and there is all kinds of information on it.
There are a whole of different noises, but I really haven't seen a database of sounds on problem vehicles. Would be an interesting project if you have the time especially if you could measure the frequency and orders of those sounds.
Since we volunteer our time and knowledge, we ask for you to please follow up when a problem is resolved.
(This post was edited by Discretesignals on Nov 8, 2011, 5:39 PM)
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