蓝牙，何去何从？

Core Viewpoint - Bluetooth is a ubiquitous wireless connection standard that connects various devices, including headphones, speakers, smartwatches, and more, while also evolving through its history and upcoming developments [1][3]. Group 1: How Bluetooth Works - Bluetooth operates using high-frequency radio waves in the 2.4 GHz band, similar to Wi-Fi, but employs adaptive frequency hopping (AFH) to avoid interference [3]. - Bluetooth has low power consumption and a smaller range compared to Wi-Fi, with backward compatibility across versions [3]. Group 2: Bluetooth History - Bluetooth was named after King Harald "Bluetooth" Gormsson and originated from a 1996 meeting among Intel, Ericsson, and Nokia, with the first version released in 1999 [7][8]. - Major versions and their improvements include: - Bluetooth 1.2 (2003): Addressed Wi-Fi interference and improved pairing speed [12]. - Bluetooth 2.0 (2004): Enhanced data rate (EDR) increased speed from 1 Mbps to 3 Mbps [12]. - Bluetooth 4.0 LE (2010): Introduced low energy consumption [12]. - Bluetooth 5 (2016): Increased range from approximately 50 meters to over 200 meters [12]. - Bluetooth 5.3 (2021): Improved audio quality and power efficiency [12]. - Bluetooth 5.4 (2023): Enhanced security and reduced latency, with features for electronic shelf labels (ESL) [12]. Group 3: Upcoming Developments - Auracast, announced in 2022, will allow multiple users to connect to the same audio stream in public spaces, enhancing accessibility for individuals with hearing impairments [13][14]. - Devices must support Bluetooth 5.2 or higher to utilize Auracast, and widespread adoption may take time due to the need for compatible broadcasting equipment [14].