[__rito__]

Having an headphone on ears for 6-9 hours continuous- isn't that harmful for health?

[nunez]

It's fine as long as the earbud fits well. Comply foam or custom tips makes that easy. https://health.clevelandclinic.org/sleeping-with-headphones

I've been sleeping with custom ear molds for five years prior to moving to noise machine earbuds. Hearing's fine as of earlier this year!