How Wireless Speakers Can Withstand Interference

Even though manufacturers of wireless speakers would like you to believe that nothing could come in the way between the music which you are streaming from your device and the speakers, the fact is that a lot of can go wrong with the signal while it is traveling. That is because other wireless devices are also transmitting radio waves which might or might not be at the same frequency as the signal which is being sent out by the transmitter. In this paragraph I will show some of the techniques which are being utilized in order to enhance the robustness of wireless speakers when it comes to being able to resist problems due to wireless interference.

speakers which are wireless

First of all, let me explain the main problem. Just imagine an FM radio station. FM radio stations send out radio waves over a specific frequency. That frequency is carefully allocated by considering other nearby transmitters. If every radio station was going to transmit at the same frequency, the result would be that all of these signals would compete with one another and there would be nothing but static when listening to the radio. In order to avoid this, every radio station uses the frequency which differs from the frequencies of other nearby stations. Thereby the listener can tune into any channel and receive just one radio station.

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Wireless speakers are quite a bit different than radio stations, however. That is because the frequency that is being used is not allocated by any government authority. Instead, wireless speakers use certain frequency bands which are open for use by unlicensed equipment. As a result, chances are that two or more devices are trying to transmit the signal at the same frequency. That can cause problems because one signal can easily be affected by another. One technique to avoid this is called adaptive frequency hopping. In the next paragraph I am going to describe this technology.

The first step is to scan the frequency band for signals. The result is a table listing all channels which are used by other transmitters. In addition, there will be a list of available free channels which are currently not being occupied by other devices. Those free channels are then used to assemble an adaptive hop set. The signal which is being transmitted is jumping between these frequencies. While the signal is being transmitted, the adaptive transmitter will continue scanning the frequency band. Every once in a while some free channels will become occupied by other transmitters. At the same time, some channels will open up. If one of the channels being used in the adaptive hop set is occupied by another transmitter, the adaptive transmitter will remove it from its hop set and replace it by another free channel.

This technology ensures not only that the own signal has less chances of being disrupted but also minimizes the impact of its signal onto other devices.