Have you ever been on a long journey with a friend and wished you could watch the same show or music while you travel?In a car, you can just turn on the radio and play whatever you want. But on a train, plane, or other public transport, blasting whatever media you’re watching is hugely inconsiderate for your fellow travelers.That’s where the humble headphone splitter comes in. You’ve probably seen them in use, but how does a headphone splitter actually separate the audio for two sets of headphones without losing any quality?