There’s no debate that wireless devices make life easier and simpler. Take wireless stereo systems, for example. With a traditional wired speaker, you have to figure out the right output terminals to plug your system into. The cords can get tangled, creating a tripping hazard and ruining the look of your home theater.
A wireless audio solution is seamless in comparison to a wired speaker. Since there are no cords to deal with, all you need to do is wirelessly pair the speaker with the audio source. Once the two devices are connected, you can start enjoying your audio. This may seem like magic, but it’s possible, thanks to transmitter and receiver technology.
Interested in learning what a wireless audio transmitter and receiver is? Basically, a transmitter takes electrical energy and turns it into radio waves. It has different elements that work together to create radio waves, including:
- Power Source: Deliveries the energy that allows the device to work
- Oscillator: Creates an alternating current at a frequency the transmitter uses to send radio waves
- Modulator: Adds useful information to the radio wave, such as amplitude modulation (AM) and frequency modulation (FM)
- Amplifier: Increases the strength of the radio wave to amplify its broadcast
- Antenna: Transforms the electrical signals into radio waves and broadcasts them
The receiver is the opposite of a transmitter. It intercepts radio waves. A receiver consists of the following:
- Antenna: Captures radio waves
- Radio Frequency (RF) Amplifier: Improves the strength of weak signals, making it easier for the tuner to process the signal
- Tuner: Extracts specific signals from an assortment of different frequencies—think of the tuner like a filter. Without it, you would hear radio waves from all frequencies.
- Detector: Separates audio information from the radio wave
- Audio Amplifier: Strengthens the signal so it can be heard
Speakers are made up of various components, however, the driver is arguably one of the most important parts of the system. The driver is responsible for converting audio signals into sound waves.
Audio signals are electrical energy the audio source sends the speaker to turn into something you can hear. For wired speakers, these signals are sent through the wire that connects the two devices. With a wireless sound system, however, the signal is sent through the transmitter.
When the audio source sends an audio signal to the transmitter, the signal is converted into radio waves. Those radio waves are intercepted by the receiver. Once the wireless speaker receiver kit catches the radio waves from the transmitter, they are converted back into electrical energy.
Now that the audio signal has reached the speaker, the driver is able to do its job of turning the signal into sound waves. The connection between the transmitter and receiver are vital to the function of wireless speakers. But what allows you to pair these two components?
Bluetooth is a connection standard that’s used for all kinds of wireless devices, like speakers and game controllers. This wireless connection allows devices to share data over short distances using ultra-high frequency (UHF) radio waves. Since Bluetooth is a complex topic, there’s no need to do a deep dive. However, it’s important to know that for transmitters and receivers to work together, they need to be able to use the same Bluetooth profile.
WiSA is an international trade association comprised of leading audio, CE and manufacturing brands who collectively define world-wide standards for wireless, High-Resolution, multichannel audio.
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