Sculk Sensor reacts to you taking on and off any type of equipment, even when they don't make any sound at all. Armor - alright, elytra - rustles like leather, so fair... Heads and carved pumpkin don't make any sound, both for putting on and taking off, but sculk sensor react like it hears something in that. Even better, putting on any item with /item replace will also make sensors react once the item is replaced no matter which item you put on your head. I think the solution, I think, might be just to play respective sounds for armor and elytra both when on and off, and also add a general sound for putting on/off any other miscellaneous item on your head.