Reddit reviews Parts Express Airline Headphone Adapter

Adapter to convert a normal headphone to the dual-headphone jacks some airlines still use.

http://www.amazon.com/Parts-Express-Airline-Headphone-Adapter/dp/B002I9WCWK

It's called airplane headphone adapter or something like that.

http://www.amazon.com/Parts-Express-Airline-Headphone-Adapter/dp/B002I9WCWK

All you would need is one of these

A20s work quite well to lower cabin noise.

There's two reasons.

The first is the two-port headphone jack is a remnant of older times, back when headphone jacks were designed to split the audio signal between a left and a right channel (or, in layman, the left and right speaker/earphone). It actually became more cost-effective for airliners to incorporate two-prong headphone jacks in the event that one jack stopped working — if it did, you could still hear audio out of one ear, which is better than nothing. Ergo, airliners deferred maintenance on a seat armrest (where most jacks are) until both parts of the dual jack broke.

The second — and this is almost certainly true of any airliner that still uses them today — is because airplanes want to make additional money off passengers. Consumers don't typically purchase two-prong headphones anymore, they buy standard, 3.5-mm jack compatible headphones for their phones, tablets and computers. Airliners know this, and they know if you want to watch an in-flight movie or listen to music, you'll shell out $5 for one of their headsets — and you won't steal them at the end of the flight.

Frequent travelers usually forego all these problems by buying a headphone jack adaptor, [like this one] (http://www.amazon.com/Parts-Express-Airline-Headphone-Adapter/dp/B002I9WCWK/ref=pd_sim_e_4?ie=UTF8&refRID=0D9V0QWWTC1DG0T5JEQG).

The whole practice is growing obsolete — passengers are bringing their own movies and TV shows on their phones and tablets, and newer planes have the standard 3.5-mm jack for watching satellite TV or listening to the radio. Airliners have moved away from gouging consumers of their $5 for headphones to gouging consumers $30 for flying with bags.

sorry, forgot to link, https://www.amazon.com/Parts-Express-Airline-Headphone-Adapter/dp/B002I9WCWK

Just so you know, there are two ports on a plane occasionally, but they are 2xmono - like with these guys: https://amzn.com/B002I9WCWK