Instruction: Output yes if the supporting document can answer the given question. Otherwise, output no.

Input:
Question: Are these things loud? Every video I see online has music in the background, but I want to know how much noise these things make?  Can you run on them without being embarrassed at how squeaky they sound?
Document: I purchased these for my 13 year old son who is into everything adventurious. love the way they attach to your leg and shoes, makes me feel more secure about my son using them. he loves them and is so happy to have been able to master running, jumping and everything inbetween  on his fly jumpers. good item, fast delivery.
Answer: no