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Back in 2016 Apple famously removed the headphone jack from the iPhone 7, and while customers and companies alike mocked Apple for releasing a flagship smartphone without a headphone jack, it eventually became clear within the next couple years that the iPhone 7 had set a trend that virtually every other smartphone manufacturer would follow. Now I want to start off by sharing some background knowledge of the 3.5mm headphone jack. Which is one of the most unique I/O ports to ever exist, and there are a few reasons for this.

First, it was invented over fifty years ago in the 1960’s, which means it came out before the VCR player, a product many of you may not even recognize since it’s been obsolete for so long. But the headphone jack was able to stand the test of time and remain relevant even to this day. Which brings me to the second thing that makes the port so special, it can actually be upgraded with modern features by simply adding another ring to its sleeve. That’s why older headphone jacks only have one or two rings, while today we’re used to seeing three. And those extra rings added capabilities like stereo audio and audio input, without the need to redesign an entirely new connector, not to mention modern headphones are backward compatible with older products. But there’s one more important quality of the headphone jack, it served as a ubiquitous industry standard for audio in and out.

Strange Parts video: https://youtu.be/utfbE3_uAMA