Radio is no longer limited to AM and FM. Today, listeners can move from a local station to satellite radio, digital broadcasts, or an internet stream in seconds, and each format works a little differently behind the scenes. The main types of radio broadcasting covered in this guide are AM, FM, digital, satellite, and internet radio. If you want to work in radio, understanding how these formats work can help you see how modern content reaches audiences and where your production skills fit in. Below, we break down each type of radio broadcasting, compare how they work, and explain where they are used today.
What You Should Know Before You Start
Do you need special equipment for digital or satellite radio?
- Digital radio broadcasts require a compatible receiver. Availability depends on the digital radio system, vehicle, and market.
- Satellite radio requires compatible equipment and typically an active subscription.
Which radio format is commonly used for talk and news?
- AM remains common for local talk, news, and sports because it can cover large geographic areas.
- Many broadcasters also simulcast programming on FM and stream it online, giving audiences more ways to listen.
Do you need a license to broadcast in any of these formats?
- AM and FM stations need a Federal Communications Commission (FCC) license to transmit over the air in the United States.
- Internet-only radio does not require an FCC broadcast license, although music streaming may still require appropriate music licensing and royalty payments.
Table of Contents
- How AM Radio Broadcasting Works
- How FM Radio Broadcasting Works
- Digital Radio Broadcasting: HD Radio and DAB
- Satellite Radio Broadcasting: What Is SiriusXM?
- Internet Radio Broadcasting: What Is Internet Radio?
- Comparing the Types of Radio Broadcasting
- Why BeOnAir
- Frequently Asked Questions
How AM Radio Broadcasting Works
AM stands for amplitude modulation. It carries sound by changing the strength, or amplitude, of a radio signal while the signal’s frequency remains constant.
One reason AM has remained useful is its reach. During the day, AM signals travel mainly along the ground, while at night they can also reflect from the ionosphere and travel much farther. Because this can create interference between stations, some AM broadcasters must reduce power or change their nighttime operations under FCC rules.
AM is particularly well suited to formats where spoken content matters more than high-fidelity sound, including talk radio, news, and sports.
A few characteristics are especially useful to understand if you want to work in radio:
- It can cover large areas: AM signals can travel significant distances, particularly under the right nighttime conditions.
- It is more vulnerable to interference: Electrical storms, power lines, and electronic equipment can create the static listeners sometimes hear.
- Transmission affects the listener’s experience: What sounds great in the studio still has to reach an audience clearly.
If you are building a career in broadcasting, you do not need to become a radio engineer. However, understanding what happens after the microphone can help you become a more knowledgeable broadcaster or producer.
Our guide to how AM and FM radio work explores the differences in more detail, while the FCC establishes the rules governing licensed AM and FM broadcasting in the United States.
How FM Radio Broadcasting Works
FM stands for frequency modulation. Instead of changing the strength of the signal, as AM does, FM carries audio by varying the frequency of the carrier wave.
This makes FM less vulnerable to many types of interference and generally gives listeners clearer, higher audio quality sound. That is one reason FM became closely associated with music and stereo broadcasting.
The tradeoff is reach. FM signals travel largely by line of sight, so distance, terrain, buildings, transmitter power, and antenna height can all affect how far a station can be heard.
A few things future broadcasters should know:
- FM delivers clearer audio: This makes it well suited to music and other programming where sound quality matters.
- Coverage tends to be more local: Hills, buildings, and distance from the transmitter can weaken the signal.
- The technical setup matters: Antenna height and transmitter power both affect how effectively a station reaches its audience.
You may spend most of your time thinking about what happens behind the microphone, but understanding how that content reaches listeners helps you see the bigger picture of how a radio station operates.
Digital Radio Broadcasting: HD Radio and DAB
Digital radio converts audio created in the studio into digital data before broadcasting it over the air. Depending on the system, this can allow stations to provide additional channels, song and artist information, traffic updates, alerts, and other data alongside the main program.
In the United States, the digital radio system you are most likely to encounter is HD Radio. It is the digital broadcasting technology approved by the FCC for the AM and FM bands, and FM stations can use it to provide their primary programming alongside additional digital subchannels.
Outside the U.S., many countries use DAB or DAB+ (Digital Audio Broadcasting). According to RAJAR, DAB accounted for 57% of digital listening hours in the UK during the second quarter of 2026. Germany’s combined DAB+ networks now reach around 98% of the population.
A few things future broadcasters should know:
- More content can share the airwaves: Digital broadcasting can allow stations to provide additional programming and data without requiring a completely separate traditional FM frequency.
- Listeners can receive additional information: Stations may transmit details such as song titles, artist names, station information, and alerts alongside the audio.
- Radio is increasingly multiplatform: A station may broadcast through AM or FM, provide digital channels, and stream online at the same time.
That last point matters if you want to work in radio. Today’s broadcaster is rarely creating for just one signal. Understanding how content moves from the studio to different platforms gives you a much clearer picture of the modern radio industry.
Satellite Radio Broadcasting: What Is SiriusXM?
Satellite radio delivers programming through satellite-based services to compatible receivers, allowing listeners to access the same channels across much larger geographic areas than a local AM or FM signal can typically cover.
SiriusXM is the major satellite radio provider in the U.S., offering music, sports, news, talk, and entertainment through its satellite service and app.
A few things future broadcasters should know:
- It is built for wide-area listening: Programming is not tied to the coverage area of a single local transmitter.
- Subscriptions are central to the model: SiriusXM provides paid access to music, talk, sports, entertainment, and other programming.
- Satellite and streaming increasingly overlap: Listeners can also access SiriusXM content through phones, computers, and other connected devices.
For broadcasters, satellite radio is another example of how one piece of audio content can reach audiences through multiple platforms.
Internet Radio Broadcasting: What Is Internet Radio?
Internet radio delivers audio through the internet rather than a traditional AM or FM transmitter.
A local radio station can stream its broadcast online, while another station can exist entirely on the internet and reach listeners far beyond its home market.
Why does that matter if you want to work in radio?
- Your potential audience can be much larger: An internet connection can take local content to listeners almost anywhere.
- People can listen across devices: Phones, laptops, smart speakers, and connected cars have all become part of the radio and audio experience.
- Digital skills matter: Working in radio increasingly means understanding streaming, online audiences, and multiplatform content.
That audience is already substantial. Edison Research found that 81% of Americans age 12 and older listened to online audio during the previous month in 2026, representing approximately 233 million people.
Comparing the Types of Radio Broadcasting
There is no single “best” type of radio broadcasting. Each format reaches listeners differently, which affects everything from sound quality and coverage to how a station produces and distributes its content.
Here is a simple comparison:
| Type | How It Works | Key Strength | Common Uses |
|---|---|---|---|
| AM radio | Changes the amplitude of the carrier signal | Long-distance coverage | Talk, news, and sports |
| FM radio | Changes the frequency of the carrier signal | Clearer, higher-quality sound | Music and local programming |
| Digital radio | Transmits audio as digital data | Additional channels and information | Music, talk, data, and alerts |
| Satellite radio | Delivers programming through satellite-based services | Wide geographic coverage | Music, sports, news, and entertainment |
| Internet radio | Streams audio over an internet connection | Potential global reach | Live radio, online stations, and streamed audio |
Traditional radio is also continuing to evolve alongside digital platforms. Nielsen’s 2026 audio research shows that AM/FM radio remains a significant part of U.S. ad-supported audio listening even as audiences increasingly use streaming, podcasts, and other digital formats.
For future broadcasters, the opportunity is therefore not simply about choosing analog or digital. It is about learning how audio is created, produced, adapted, and delivered across multiple platforms.
Take What You Know Into the Studio
Understanding AM, FM, digital, satellite, and internet radio gives you a useful foundation. Learning how to create content for those platforms is where professional broadcasting skills begin.
Through our BeOnAir Radio & TV Broadcasting program, you can gain hands-on experience with professional broadcast equipment, studio production, audio editing, on-air performance, and digital broadcasting.
If the technical and creative side of sound interests you most, our Audio Production program allows you to explore audio recording and production in greater depth.
Ready to See Broadcasting From Behind the Board?
Knowing how different types of radio broadcasting work can help you understand the industry. Stepping into a studio can help you understand where you might fit within it.
Explore our broadcasting and media programs to see the training options available, or book a campus tour to experience the studios and equipment for yourself.
If you are ready to start building practical skills for a career in media, you can also apply online.
Frequently Asked Questions
What types of radio stations can you work for?
Radio stations can broadcast through AM, FM, digital radio, satellite, internet streaming, or a combination of these formats. Traditional AM and FM are terrestrial services that use the radio spectrum and operate under FCC regulations in the U.S., while other forms of broadcasting rely on digital, satellite, or internet distribution.
For future broadcasters, understanding these formats helps show how one piece of content can now reach audiences in multiple ways.
How does amplitude modulation affect an AM signal?
Amplitude modulation carries an audio signal by changing the amplitude of a carrier signal while its frequency remains constant. AM can provide long-distance, cost-effective coverage, making it useful across large geographic areas, including rural communities.
At night, atmospheric conditions can allow AM signals to travel hundreds of miles. Because signals from different stations can interfere with one another over these longer distances, some stations must adjust their nighttime power or operations under FCC rules.
How does satellite audio broadcasting work?
Satellite audio broadcasting delivers programming through satellite-based services to compatible receivers across wide geographic areas. SiriusXM is the primary U.S. satellite radio provider, and receiving its satellite service generally requires compatible equipment and a subscription.
SiriusXM also provides internet streaming, so listeners may be able to access its programming across multiple devices. Plans, channel lineups, and subscription options can change, so listeners should check SiriusXM directly for current information.
How are DAB broadcasts different from analog radio?
DAB broadcasts encode audio as digital data rather than transmitting it using traditional analog AM or FM modulation. Digital multiplexing allows multiple program services and additional data, such as station and program information, to be carried together. This can make more efficient use of available spectrum and give broadcasters greater flexibility in the services they provide.
Does internet radio have a wider reach than traditional radio?
Potentially, yes. With internet access, a station is no longer limited by the geographic coverage of a terrestrial AM or FM transmitter, giving internet radio the potential to reach listeners around the world.
Many traditional stations now stream online alongside their over-the-air broadcasts. Internet-based audio services also allow listeners to access content through phones, computers, smart speakers, connected cars, and other devices.