Driveline Noise Diag
Wanted to share this quick video on how you can use the scope to identify and make sense of driveline noises to be able to clearly make a good call and not be left guessing. I hope it helps some and thank you in advance.
Thanks for the demonstration. I purchased the microphones after watching one of your videos awhile back. I have found them to be accurate when refining the source of troublesome noises. Yes, I have a NVH as well, but find your technique is great for a variety of diagnostic noise complaint. Do you know of any quick electrical adapters available to connect the microphones to the BSN connectors?…
Hi Marty, This is a set made by Jarhead Diagnostics that work with the wireless Chassis ear microphones. They have a BNC male plug on one end and an RCA female plug on the other end. Ebay actually has such cables that can be purchased at various lengths and amount you are looking for. These only work with scopes that have BNC connectors. ChassisEar BNC to RCA Inline Socket Oscilloscope Lead…
Thank you Marty, contact me , I have some adapters for the chassis ears. …
Hello Sadel, Do you have a way to connect the older wired style Non wireless Chassis Ear microphones with the 3.5mm microphone jack leads?
Great tip! Anyone that has beat there head against the wall on a noise diag, can really appreciate the simplicity of establishing a baseline where there is no audible noise to the human ear, and then monitor scope readings from the various “microphones”, once the noise goes into the audible range. You are correct that the investment is pretty minimal. About…
I found 3.5mm pigtails on Amazon and soldered to bnc pigtails
Randall, I believe it would be fair to be in the range of an hour or two for initial hooking up mics and capturing a waveform , depends how many hook ups need be made and how many trips need to be made. Sometimes that's all that would need to pick up a noise to pin point the issue , sometimes there's more time involved and more diag like my rod knock demo I showed. Like everything it just…
My thoughts as well. I don't believe I would want my shop to charge less then 2 hours for what you described. We would have likely started with a road test and some time spent in trying to identify the noise on the hoist, prior to hooking up the chassis ears. Not hard to loose time on some noise diags. We will see how it goes, once we have had a chance to experiment with your technique. I…
I also saw your related video a year ago. So I've been thinking of a way to implement the ideas you discussed. Since I did not have my own set of Chassis Ears, I was using shop owned Chassis Ears that were frequently damaged and placed back in the box. Even if I did preliminary testing of the leads, I would get misled by microphones/leads that did not generate audio at the same volume given the…
Sadel - i love your method of seeing the noise on all channels at the same time vs switching the box back and forth to listen.
Here is a link to the project files for an adapter one of my techs made, that allows all four chassis “speakers” to be fed into a Zeus(and I suspect other scopes), and allow “listening” to four chassis “speakers” on the four channel scope. It really turned out nice, Imo: thingiverse.com/thing:5317972