Reaction to a product is just a distorted noise (8)
I believe the answer is:
feedback
'reaction' is the definition.
(I've seen this before)
I don't understand the rest of the clue.
Can you help me to learn more?
(Other definitions for feedback that I've seen before include "useful response to inquiry" , "Informative response" , "Responses to customer survey" , "Response to an inquiry or experiment" , "Information about results" .)