Noise puzzles for buddies

Hello Offroader Hope to get here one or the other hint about a noise phenomenon, which I noticed for the first time yesterday. Was on the way with my wrangler, the windows all below, wonderfully warm. Then I suddenly made out a noise under the car. Each time per wheel turn. Thought first of all on a stone or similar in the tire profile, however, it was not a short hard “Tick – Tick – Tick” but rather a “pffft – pffft – pffft”, similar to the noise which one If you put a playing card on the bike so that the spokes make a noise (we did it before anyway). It only occurred when driving without load, both when accelerating and braking it disappeared suddenly. Well, the car was in the 100′ service week ago, including timing belt changes and changes on summer tires. Now, of course, you might think it has to have something to do with the tyre change (since the service was the first time with open But since the whole car was screwed, it doesn’t necessarily have to be related to the socks, which I checked all 4 on any parts stuck in the profile. I was still lying under it, but with my technical understanding I would have trouble to recognize if the drive shaft were missing. Maybe one of you has a ignite idea, otherwise I have no choice but to go to the friendly one and let him hear and find out the mistake in his own attempt. Thank you in advance for your tips. Salut Alfan