[Retracted] Voice Recognition Control System Based on Cloud Computing and IoT Sensors

Table 1

Comparison of various wireless communication technical indicators.

Way of communication	Infrared	Bluetooth	Wi-Fi	ZigBee
Working frequency	820 nm (wavelength)	2.4 GHz	5.2 GHz	868/915 MHz/2.4 GHz
Coverable distance	6	11	25	200
Transmission rate/(Mb/s)	1.521/4/16	1	54
Power consumption	15	100	100	3
Transfer method	One-on-one	One-to-many	One-to-many	One-to-many
Maximum number of nodes	2	5	255	65000