headphoneout

headphoneout is a term that typically refers to the audio output jack on electronic devices that is designed to connect headphones. This jack allows users to listen to audio privately without disturbing others. The standard connector for headphoneout is a 3.5mm (or 1/8 inch) TRS (Tip-Ring-Sleeve) or TRRS (Tip-Ring-Ring-Sleeve) connector. The TRS connector usually carries stereo audio, while TRRS connectors can also carry microphone input, making them common on smartphones and some laptops for headset functionality.

The headphoneout port has been a ubiquitous feature on portable music players, smartphones, tablets, computers, and other audio-playing devices for many years. However, in recent years, some manufacturers have begun removing the headphoneout jack from their flagship smartphone models, citing reasons such as space-saving for other components, improved water resistance, and a push towards wireless audio solutions like Bluetooth headphones. This trend has led to a greater reliance on adapters or wireless alternatives for users who wish to use wired headphones with these devices. Despite its declining presence on some new devices, the headphoneout jack remains a standard and widely used audio output method.