Final answer:
Bluetooth uses Frequency-hopping spread spectrum (FHSS) to communicate between devices. It operates in the 2.4-GHz frequency range and ensures secure and reliable transmission by rapidly changing frequencies to avoid interference, similar to how 4G, Wi-Fi, and GPS technologies transmit signals.
Step-by-step explanation:
Bluetooth technology utilizes the Frequency-hopping spread spectrum (FHSS) as a method to reduce interference and improve the security of the communication channel. This spectrum technology enables Bluetooth devices to rapidly switch between many frequency channels, thereby avoiding potential interference and eavesdropping. Like Bluetooth, other wireless communication technologies such as 4G, Wi-Fi, and GPS operate in the radio-wave portion of the electromagnetic spectrum. These frequencies are selected because they are less likely to be absorbed by common building materials, ensuring a more reliable signal. Furthermore, like other radio communication methods that vary the wave's amplitude (AM) or frequency (FM), Bluetooth in the 2.4-GHz range facilitates communication between nearby devices. Various applications and technologies like highway toll sensors, or medical equipment, use specific frequencies within the radio spectrum, and this is why there are regulations for the use of mobile devices in areas where interference with sensitive equipment must be prevented.