The noise does decrease when I coast but does not go away completely. Rough roads will aggravate the frequency of the sounds. Pedaling will do the same, especially in the rear wheel. I would assume applying torque to the rear wheel is causing that.
My then-new wheel did exactly the same thing for around 2-3 weeks back in the spring. More ticking and pinging sounds while mashing, climbing hills, etc., fewer when coasting or not pedaling hard. Just the spokes wearing in. No noises since everything settled. I didn't even bother with lubing the spokes.