目录

蓝牙音箱

蓝牙

什么是蓝牙?

Bluetooth is a standardized protocol for sending and receiving data via a 2.4GHz wireless link.It's a secure protocol, and it's perfect for short-range, low-power, low-cost, wireless transmissions between electronic devices.

蓝牙的工作原理

The Bluetooth protocol operates at 2.4GHz in the same unlicensed ISM frequency band where RF protocols like ZigBee and WiFi also exist. There is a standardized set of rules and specifications that differentiates it from other protocols.

什么是蓝牙音箱?

蓝牙音箱的设计

Simple Wireless Bluetooth Stereo Audio System for Outdoor Use

蓝牙音箱的特点

1.应用广泛

2.操作简便

3.传输速度较快

4.传输距离适中

蓝牙音箱的工作原理

一个简单的蓝牙音箱基础包括数据同步接受模块(包括EPROM)、数字模拟转换模块(D/A),功放模块(前置运放+后级功放)。

普通便携式蓝牙音箱是通过3.5mm音频插头直接获得音频信号源,然后通过内部放大电路对音频信号进行放大处理再推动扬声器发声。现在把蓝牙耳机的音频输出端并联在便携式音箱的3.5mm插头上,这样手机便可通过蓝牙将音频信息发送至蓝牙耳机,音箱便可放大由蓝牙耳机发出的音频信号,达到扩音的目的。