Noise Audible measurement.

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Jaycon
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Noise Audible measurement.

Post by Jaycon » Mon Nov 11, 2013 9:03 pm

Is it possible to measure noise/vibration with the automotive scope using accessories or with the standard kit, something like an electronic stethoscope might do to pin point noise location thanks.

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Fat Freddy
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Re: Noise Audible measurement.

Post by Fat Freddy » Tue Nov 19, 2013 5:52 am

What sort of noise/vibration?
using accessories
Chassis ears? Piezo transducers?

Steve Smith
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Re: Noise Audible measurement.

Post by Steve Smith » Tue Nov 19, 2013 2:48 pm

Hi Jaycon, at present we do manufacture an NVH kit (Noise Vibration and Harshness) for use with OEM's (Original equipment manufacturers) with specific software for their vehicles.

However during early 2014 this will be released to the Aftermarket as an extension to the Pico Diagnostics platform which will give you Battery-Starting-Charging/Relative Compression/Cylinder Balance, and then NVH.

I do not have any prices as yet but please watch the newsletter and website for further information.

There are, I am sure, BNC mic's and accelerometers on the market that can be linked via an interface into a scope but do require interpretation in relation to the noise/vibration applied. NVH really is another world and as ever training is the key. I have only touched on this subject in brief in my previous role and will soon be booked on a dedicated training course where I hope to pass some of this knowledge on.

Take care.......Steve

Jaycon
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Re: Noise Audible measurement.

Post by Jaycon » Thu Dec 05, 2013 2:02 pm

Hi guys thanks for reply, I had received information there was an add on for the automotive scope but couldn't find any info about such to date, I had a look at the chassis ear and was considering a purchase. I think I will hold off and review the complete pico kit when it becomes available next year, thanks again Freddie and Steve.

northfieldauto
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Re: Noise Audible measurement.

Post by northfieldauto » Mon Dec 16, 2013 6:08 am

Yes, possible. Try piezo sensors, or Stelmans chasiss ear, or Diesel RPM pick up.
The key is interpretation of the data. Piston pin knock, valvetrain noise, or chain slap. It varies on engine to engine due to design and failures. Also there is error from sensor to sensor.
I gathered some data and can ID some failures, but it is a wide area to cover.
Usefull on 3V Ford engines to distinguish chain failures, monitoring Injector pintle opening on high pressures common rail. Valve train noise indentification. Confirming solenoid operation without electrical hook up.
etc.
If people are interested I can post some interesting case studies.

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Robski
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Re: Noise Audible measurement.

Post by Robski » Wed Dec 18, 2013 2:55 pm

If people are interested I can post some interesting case studies.
Go for Gold pal :mrgreen:

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