- #1
k.udhay
- 160
- 10
Presently there is a gear whine noise issue in a vehicle transmission. Our NVH team captured the noise signal using a microphone and then did an FFT of the signal and gave us a frequency plot. What exactly can I take out of it?
- Can I assume every harmonic belongs to a noise generated by a gear having the same meshing frequency?
- Then, what are those harmonics which don't match with any gear order?
- An irrelevant question - Does excess PCD runout of a gear cause whine? How to prove if that is the major cause?