Use headphones to watch the movie and listen to music, but when you want to sleep use a set of $2 earplugs from your local pharmacy. They are comfortable if you put your head to the side, and they cut out all noise, not just low end wavelengths. From a reluctant gold exec frequent flyer.
Yes they have it as an add-on - http://www.amazon.com/HeadphoneMate-Microphone-Samsung-Android-Smartphones/dp/B00EWQDC8A/ref=cm_cr_pr_sims_t
I bought this aftermarket on Amazon and it works just fine - standard 3.5mm jack - just pull the old cable out from the base of the headphones and slide this one back in its place