There are more Bluetooth headset products on the market, while Bluetooth speakers are relatively few. The so-called Bluetooth speaker actually refers to a speaker that relies on the Bluetooth transmission protocol as a carrier for data transmission. Since most mobile devices (mobile phones, laptops, tablets) have a Bluetooth chip, no data or audio cable is required. Quickly identified, easy to operate, and easy to connect.
From the perspective of sound quality performance, the effective audio data volume of CD sound quality data (44.1KHz sampling rate, 16bit sampling accuracy) is about 1.4Mbit. To transmit CD sound quality music signals, the transmission rate only needs to be maintained at 2Mbit per second. Bluetooth The “2.1 + EDR” specification is sufficient. In addition, since these products often use the mature acoustic structure of traditional speakers, and realize wireless playback after integrating the Bluetooth module, their sound quality performance is comparable to that of similar speakers.
In terms of specifications, although the Bluetooth 3.0 / 4.0 standard has been proposed, the former is mainly reflected in the alignment of Bluetooth’s radio frequency modulation with Wi-Fi, and the latter is reflected in the application of automatic power control, that is, low power consumption. Both versions reflect advances in Bluetooth technology, but have little to do with audio applications. From the chip level application, it is suitable for 3.0 / 4.0 version.
The mainstream Bluetooth speakers use the A2DP stereo protocol. In 2012, smartphones, tablets, and other devices supported the A2DP protocol. Therefore, in terms of use, Bluetooth speakers are completely free of any obstacles.