Apple put a barometric vent in the space where the iPhone 7 headphone jack would have been

iFixit is the hero this industry needs, and it has once again done a beautiful job of ripping apart a brand-new iPhone and showing us what's inside. Even better, iFixit does X-rays, too! Do you want to see inside that Taptic Engine black box? Now you can: iFixit
Thank you, iFixit! Oh, and what's that weird ghostly circle on the lower right third? It'€™s the non-mechanical home button, of course.
A couple other things of note:
There are only a few tweaks that make the iPhone 7 waterpro