HAM Radio
Amateur Radio Transmissions
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Ham Sandwich

Meet Gaspar Miró, or EA6AMM (echo alpha six alpha mike mike), a Spanish radio amateur broadcasting from Majorca in the Balearic Islands. Gaspar offers us a tour of the different signals picked up by his antennas. Most of those in this generator are data transmissions. We can get a closer look at how HAM radio functions through his recordings.

At the core of this process, a carrier frequency is paired with a modulation that alters the carrier to convey data. The modulation can be either in the time domain, modifying the carrier’s presence at any given moment, or in the frequency domain, modifying the carrier frequency itself. The Morse modulation, for example, breaks the carrier into short and long bursts to encode the different letters of the alphabet. Thus, the carrier is modulated in the time domain. Frequency-shift keying, as illustrated by the third (orange) slider, doesn’t chop the signal as one might think. The carrier is always present, but switches between two frequencies. Thus, this is frequency modulation. The second slider (red) uses the same principle though at a much slower modulation speed and with more than two frequencies. This allows the slider to create something of a melody, albeit one born from an algorithm rather than a traditional music scale.

The fifth (green) and sixth (teal) sliders showcase contests for radio amateurs. Using Morse or plain speech, members of the HAM radio community had to contact as many contestants as fast as possible. In one of the latest world contests, our friend Gaspar was in 22nd position, with 4,700 contacts in 24 hours!

Many sliders in this generator create odd sounds. The seventh slider (light blue), for example, could be the soundtrack of a 1950s horror film. Behind these oddities, people who suffer from tinnitus may find a surprising relief. And those without can take advantage of the excellent noise-blocking properties of all these sounds.

If you like these sounds, consider joining the HAM radio community and meet cool people all around the world. After all, it was a real pleasure to team up with Gaspar.

Testimonials - write yours here

Tip : click the blue dots to load their associated settings.

  This is absolutely fascinating. These sounds and the write up here spired me to read up on HAM radio transmissions. The depth of variability with this generator pulled me in for hours, oblivious to everything else save this beautifully strange world.

  Feels so comfy, something womblike about the cracked voices from the radio.

  This makes me feel calm and relaxed. Each night after us kids were all in bed, my dad used to fire up his HAM radio, so this is the sound I would hear as I went to sleep.

  I know next to nothing about amateur radio, but I like to put this on when I need to fill a silent room with sound. Also great to put on my headphones at the coffee shop for drowning out surrounding conversations, thanks to the vocal component.

  It’s great with Atomic City ^^

  ← Russian satellite that is lost in space I guess

  That’s just soo good!

  I grew up with ham radio. My dad (W7UDI) ran a repeater along with my late grandfather (W7FQQ) and both my mom and grandmother (K7UDI and K7FQQ) had their licenses. This... this is exactly what it sounds like in my dad's shop and what it sounded like in the garage of my late grandfather. Thank you.

  Well I'm filing this RIGHT under noise generators I didn't know I needed in my life.

  Awesome! One of my favorite background noises is radios, glad to hear of another one for myNoise. I had a blast helping you create the Numbers Station generator all those years ago. Back then I was only studying for my license, now I am licensed and working in the control systems and radio telemetry field. Here's to working on another noise generator in the future! -Christian Brown [KM4WOV]

  I love the radio noise generators on this website. They are amazing.

  Reminiscent of 60's sci-fi such as Star Trek in an eerie, intense sort of way. Love it <3

  Focusing on sliders 1, 6, and 10 sounds like wandering around an abandoned space station. Love it!

  This could actually be quite useful to me for syllabic SSB mute circuit! De VK4VT.

  M0JFE - like you a radio amateur - this is brilliant way to show how diverse our hobby is and that is a small portion of what we do - hope to have a QSO one day - 73 my friend

  My father is an extra class operator and I've spent my life listening to and learning from him. This generator reminds me of sitting in my dad's shop with the radio on hearing people from all over the world check in. All that's missing is his custom-made call sign signal casting out ._ ._ _____ ..._ ._ every ten minutes =P

  This is awesome! I have always loved the sounds of ham radio! Thats one of the major reasons I was attracted to it over 45 years ago! Especially RTTY and SSTY and all of the other ethereal sounds that are on the shortwave HF spectrum! Thanks!

  Awesome, ham can be pretty soporific, unless you're trying to copy the transmission of course! Owen M∅TGK Liverpool

  Those sounds remind me one of S. King book, where some gifted kids were kidnapped by an army and were used to sense the other side. Excellent theme!

  When played very quiet (left) and mixed with the So Quiet setting in Calm Office, can really help you focus.

  Pairs quite nicely with Isochornic Tones on the "Concentrated" preset.

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Morse ContestSSB ContestSpaceshipFSKRadiophonic WorkshopAir SurveillanceLost In SpaceModem Surprise!

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If you ♥ HAM Radio try...


Each slider controls a particular audio stream; adjust sliders to taste and mood. The animation button turns the soundscape into an slowly evolving texture. Use this feature if you intend to listen to the generator over a long period of time!