I think he wants to work. Yes he's used to hearing these loud noises at the airport where he worked. I doubt this is fear, he wants to investigate. I would take this stuff, put it on the ground, turn it on, and let him investigate. I bet he calms down as soon as he's allowed to sniff it.
Misty- Samoyed Mix, Tannor- Golden Retriever CGC
Robyn- GSD CGC, TC, Midnite-GSD CGC,TC, Brennan-Golden Retriever CGC, Batman-Husky/Greyhound , Apollo-GSD