An audio splitter is a device that allows multiple audio outputs from a single audio source. It typically has one input jack and several output jacks, enabling users to connect multiple headphones or speakers to a single device, such as a smartphone or computer. This is particularly useful in situations where several people want to listen to the same audio simultaneously. Audio splitters come in various forms, including 3.5mm audio splitters for standard headphone jacks and HDMI audio splitters for digital connections. They are commonly used in settings like classrooms, home theaters, and during group activities, making it easier to share audio without needing multiple devices.