Audio Transmitters and Receivers: How Do They Work?

Transmitters and receivers have evolved over the decades to make sending and receiving data easier. This is due to the evolution of electronic devices transitioning to the use of wireless equipment, as compared to employing traditional wired hardware. While traditional wired devices may have the fuss of figuring out which terminal to plug your device into, alongside the maneuvering of tangled cords, wireless devices have no cords, making them easy to deal with. For example, when a device is transmitting audio information to a connected speaker via bluetooth transmission to produce audible noise, this is all achieved through the use of a transmitter and receiver exchanging and transforming signals.

Every wireless device consists of a transmitter and a receiver. Although they have separate functions, they work hand-in-hand with each other to relay signals. With an antenna being an essential component in such equipment, such components work to either capture radio waves or transform electrical signals into broadcastable radio waves. For comparison, in wired devices, signals are sent through wires when relayed. However, in wireless devices, these signals are sent through transmitters and receivers. The audio sources send signals to the transmitter, converting them into radio waves. The receiver then intercepts these radio waves. Once the receiver catches the radio waves, they get converted into electrical energy. To make the transmitter and receiver work together, they must share the same bluetooth connection, that of which is the standard for all wireless devices. This helps devices connect and share data over shorter distances using ultra-high frequency radio waves, and is vital to the functionality of any wireless device. 


Transmitters are used to convert electrical energy into radio waves with the help of several other elements, such as a power source, oscillator, modulator, amplifier, and antenna. With an antenna, the transmitter can broadcast radio waves. The transmitters are available in two types, namely body pack and belt pack variations. As transmitters typically require batteries to function, users can wear these transmitters on their belts or their bodies.

Transmitters either operate as a separate piece of electronic equipment or as an electrical circuit within a device. The primary purpose of a transmitter is to communicate information over long distances.


Receivers are devices that catch the radio signals broadcasted by a transmitter, changing the received signals back into audio signals with an operation opposite of transmitters. A receiver consists of an antenna, radio frequency (RF) amplifier, tuner, detector, and audio amplifier. The antenna is used to catch radio waves.

The advent of receiver devices originated in 1933, and they are identified by their high stability and reliability of performance. However, they are not suited for heavy-duty use. The range of a receiver's frequency can differ from 500kHz to 30kHz; therefore, they are best suited for operations near powerful transmitters where high selectivity and stability is necessary.


No matter your operational needs, Limitless Aerospace is here to provide you with countless parts and components you may need for your operations. Owned and operated by ASAP Semiconductor, we have an inventory of over 2 billion parts readily available for purchase.  That way, if you are interested in buying transmitters, receivers, or any other hardware part, Limitless Aerospace is your one-stop-shop!


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