A short extension and a jack plug allowed him to use these slightly unusual cans. This isn’t a special hack, but it’s still an interesting read because it sheds a bit of light upon these old ...

A small round connector for accepting the pin-shaped plug from certain phone headsets ... is now the more common size on phones. See: Headphone Jack (3.5mm) 2.5mm connectors are still common ...

The 3.5mm headphone jack is an industry standard audio plug. Most commonly used for connecting a pair of stereo headphones to your smartphone or 'piping' your audio from your phone to an external ...

And for today's focus, why do older airplanes have double headphone ... how many passengers plug and unplug their headphones every day on different flights. The double-jack system helped make ...