A clear explanation of the different types of radio broadcasting — AM, FM, digital radio, and the internet streaming that powers our free directory.
At Airtype Radio, If you have ever wondered what the difference is between AM and FM radio, or what DAB digital radio means, or how internet radio differs from all of these, this guide gives you clear, jargon-free answers. Understanding the technology behind radio helps you appreciate why different types of stations sound different — and why internet streaming, the technology powering our directory, delivers the best audio quality of all.
AM Radio — The Original Format
AM stands for Amplitude Modulation. In AM broadcasting, the audio signal is encoded by varying the strength (amplitude) of a radio wave. AM radio can travel extremely long distances — sometimes thousands of kilometres, especially at night — and can be received with a simple, inexpensive antenna. However, AM audio quality is relatively poor: it is susceptible to interference from electrical equipment, weather, and atmospheric conditions. Today, AM radio is primarily used for news, talk, and sports coverage where voice intelligibility matters more than audio fidelity.
Why Our Directory Uses Internet Streaming Exclusively
We focus exclusively on internet radio streams because they are the only format that can deliver a truly global, cross-device, high-quality radio experience to listeners anywhere in the world. Every station in our directory streams live via a verified HTTPS connection, ensuring reliable, secure, high-quality audio regardless of which country you are listening from or which device you are using.
FM Radio — The Music Standard
FM stands for Frequency Modulation. In FM broadcasting, the audio signal is encoded by varying the frequency of the radio wave rather than its amplitude. FM is far less susceptible to interference than AM, and was designed from the beginning for stereo music broadcasting. FM radio delivers noticeably better audio quality than AM, which is why it became the dominant format for music stations from the 1960s onwards. However, FM signals do not travel as far as AM and cannot penetrate buildings or terrain as effectively.
DAB — Digital Radio
Digital Audio Broadcasting (DAB) transmits radio as a digital data signal rather than an analogue wave. This allows more stations to be packed into the same radio spectrum, and eliminates the hiss and static associated with analogue FM. DAB is widely deployed across the UK, Europe, and Australia, though its global adoption has been slower than anticipated due to the cost of replacing billions of analogue receivers. Audio quality on DAB varies significantly between broadcasters — some use very low bitrates that actually sound worse than FM.
Internet Radio — The Clear Winner
Internet radio delivers audio over the internet using the same technology as any other online streaming service. Unlike AM, FM, or DAB, internet radio has no geographic limitations — a station can reach the entire world equally well. Audio quality is dramatically better than any over-the-air format when stations stream at high bitrates (128 kbps or above). There is no interference, no signal dropouts due to weather, and no limitations on the number of simultaneous broadcasters. Internet radio has also democratised broadcasting — anyone with a computer and an internet connection can run a radio station. Our directory harnesses all of these advantages to deliver thousands of live stations to your device from across the globe.