Ok, this is weird and sad

My aunt sent me a audiogram chart that she has at school that shows sounds at different levels. Leaves rustling is in the range that I cannot hear, and until today I wouldn't have believed it and didnt notice until today. There's a decent breeze today and i can feel it and see the trees moving but i can barely hear rustling and thats if a good breeze comes along, otherwise I dont hear them :(  I never noticed that before... and I'm pretty sure I have been able to hear them at some point but I dont even know when I stopped...