Before the advent of wireless audio guide systems, scenic spots and museums primarily relied on human guides in conjunction with wired loudspeaker-equipped "ladies' ear" for explanations. Visitors had to follow the guide closely or rely on brief text descriptions, leading to problems such as interference between groups, high labor costs, and limited visitor freedom. With the development of wireless communication technologies like UHF and 2.4G, wireless audio guides gradually replaced the traditional "ladies' ear." These devices consist of a transmitter and receiver, enabling "one-to-many" explanations and allowing for selection of dozens of independent channels, ensuring that multiple groups visiting the same location do not interfere with each other, improving clarity and efficiency in group tours.
Further technological advancements have allowed for the installation of signal transmitters or the integration of RF sensors and Bluetooth, enabling pre-recorded audio content to be automatically triggered when the user's handheld device approaches a specific area, achieving a "talking wherever you go" self-guided tour experience. In the era of smart audio guides, playback modes have expanded to include map selection, QR code scanning, and other options. Built-in positioning chips in the devices display real-time location on the venue's electronic map, providing navigation functionality. The system senses the user's location through the transmitter and handheld terminal device and triggers corresponding explanatory information.
