15.04.2024 Media industry
Numbers Stations in Radio. For Puzzle and Cryptography Enthusiasts
Krzysztof Fiedorek
They broadcast seemingly meaningless strings of numbers and letters, sometimes short, encrypted messages. Some even play music between coded transmissions or broadcast propaganda. For over a hundred years, number stations have puzzled radio enthusiasts and mystery hunters. What do we know about them?
Poczytaj artykuł
w wydaniu polskim
illustration: bing.com/createThe first number stations appeared at the end of World War I. Initially, they were used to send simple Morse codes meant for spies and intelligence agents. Over time, the transmissions became more complex, incorporating sequences of numbers, letters, and even words in various languages.
The Cold War era was the peak of number station activity. They served as tools of propaganda and disinformation, broadcast by governments and intelligence agencies on both sides of the Iron Curtain. Although the number of active number stations significantly decreased after the Cold War, they still operate in many parts of the world. Their purposes and methods remain largely unknown, sparking much speculation and conspiracy theories. Some are still used by intelligence agencies, while others transmit religious or political messages.
Based on their content, number stations can be categorized into:
- Stations broadcasting strings of numbers and letters: These stations broadcast sequences of numbers, letters, or combinations of both, often without clear meaning to the average listener. An example is UVB-76, also known as "The Buzzer."
- Stations broadcasting messages: These stations transmit short, coded messages intended for specific recipients, such as spies or intelligence agents. An example is The Lincolnshire Poacher, used by British intelligence during World War II.
There are also other, less common types of number stations, such as those that broadcast natural sounds, time signals, and experimental transmissions. Some even play music or propaganda messages.
Studying and classifying number stations is a complex task due to their often hidden nature and lack of reliable information about their origins and purposes.
Broadcasting Methods of Number Stations
Number stations use different methods to broadcast their signals, depending on their purpose and available technology. Some of the most common methods include:
- Shortwave Broadcasting (SW): This is the most popular method for broadcasting number station signals. Shortwave signals can travel long distances, reaching audiences worldwide.
- AM Broadcasting: Amplitude modulation (AM) is a simple and relatively inexpensive broadcasting method, commonly used in commercial radio. However, AM signals are prone to atmospheric and other types of interference.
- USB Broadcasting: Upper Sideband (USB) modulation is more efficient than AM, providing better sound quality and less susceptibility to interference.
- LSB Broadcasting: Lower Sideband (LSB) modulation is similar to USB but offers better signal penetration in challenging propagation conditions.
In addition to these basic methods, number stations may also use more advanced broadcasting techniques, such as:
- Digital Broadcasting: Digital signals provide higher sound quality and are less susceptible to interference than analog signals.
- Spread Spectrum Broadcasting: This technique involves broadcasting the signal from multiple locations, making it harder to trace or interfere with.
Receiving Number Station Signals
Receiving number station signals can be challenging due to their weak and often distorted nature. In addition to standard radio receivers, listeners may also use specialized equipment, such as:
- Scanners: Scanners allow quick searches across different radio frequencies, making it easier to find number station signals.
- Directional Antennas: Directional antennas can focus on a signal from a specific direction, improving reception quality.
- Demodulation Software: This software can demodulate AM, USB, and LSB signals, allowing users to listen to broadcasts from number stations.
It’s important to note that many number station broadcasts are coded or encrypted, making them difficult to understand without the proper key or knowledge.
Researchers and enthusiasts of number stations use various techniques to crack codes and decrypt the messages broadcast by these stations. They employ cryptography knowledge, frequency analysis, and other methods to uncover hidden meanings in these transmissions. As noted by Wikipedia, almost no government or broadcaster has officially acknowledged the use of number stations.
COMMERCIAL BREAK
New articles in section Media industry
Equality and Diversity in Media: European Broadcasting Union Report
KFi
European public media are increasingly focusing on diversity, equality, and inclusion (DEI) as the foundation of their operations. Public broadcasters in Europe are implementing diversity strategies - both in content and within their teams. The findings from the report are clear: although progress is visible, many challenges remain.
How the Media Talk (or Stay Silent) About Climate. Reuters Institute Report
Krzysztof Fiedorek
Although climate change is becoming increasingly noticeable worldwide, the media have failed to maintain growing interest in the topic. The report "Climate Change and News Audiences 2024" shows that audience engagement with climate topics has remained almost unchanged for several years.
Clickbait Uncovered. How Online Headlines Evolved Over 25 Years
Krzysztof Fiedorek
Researchers from the Max Planck Institute analyzed 40 million headlines from the past 25 years. They are getting longer, more emotional, and negative, with a clear influence of clickbait style. Even reputable media use strategies and tricks to grab attention.
See articles on a similar topic:
Work in the media. We have more recruitment offers at Reporterzy.info [LINK]
AUTOPROMOCJA Reporterzy.info
Thanks to cooperation with the recruitment website Talent.com, the database of recruitment advertisements published in Reporterzy.info has been significantly enriched. We invite you to browse current job offers and internships in the media and advertising industry from the largest Polish cities.
Violence in Media and Child Rearing
Małgorzata Więczkowska
The influence of mass media on individuals is now an undisputed fact. There is no place today where this impact on religious, moral, political, social, or educational attitudes cannot be felt.
Poles on the Internet. RegionyNEXERY 2024 Report
KFi
The Internet not only connects people but also changes their daily habits in ways that seemed unattainable just a few years ago. Over 40% of Poles work remotely, and IoT devices are gaining popularity in rural areas. The #RegionyNEXERY 2024 report reveals surprising facts about the digital reality.
Influencers 2024. Data, Facts, and Stories from the UNESCO Report
Krzysztof Fiedorek
As many as 68% of digital creators are nano-influencers. One in three has experienced hate speech, and over 60% do not thoroughly verify information before publishing. Moreover, only half disclose their content sponsors. The findings from the "Behind The Screens" report are both inspiring and alarming.
