It’s easy to take your hearing for granted. We hear thousands of things every day, and many of them fade into the background. The hum of your refrigerator, the cars on the road, the wind in the leaves, and more. It’s the wordless song of the modern world, and there are too many verses to count. But every now and then, you hear a new sound in the cacophony, a sound you never thought you’d ever hear, if only because you didn’t know such a sound existed. And it turns out there are more than you think, so let’s check out ten.
10. The heart of a blue whale can be heard 2 miles away
The blue whale is the largest animal that has ever lived. They put even the mightiest of dinosaurs to shame. They can grow up to 100 feet long and weigh over 200 tons. Even the largest dinosaur that ever lived, Argentinosaurus, was only slightly longer thanks to its tail, but weighed about 100 tons less .
If that wasn't enough, dig a little deeper and take a look at the blue whale's heart. A massive organ weighs 400 pounds When they dive 1,000 feet below the surface, their hearts can slow to just a few beats per minute. And the thunderous sound their heartbeats make can be heard two miles away.
9. A bee's penis makes a loud popping sound after mating.
The insect world is a harsh and compassionless place. We all know that the female praying mantis eats her mate's head after they reproduce, and many female spiders eat the males if they can't escape. Insects have it tough, and bees are no exception. Some bees die when they sting you, and it turns out that some die after mating, too. And it's not because the queen is vicious and deadly like these praying mantises. Instead, it's because the male reproduces with such ferocity that, when he finishes, he explodes his penis with with an audible pop .
All a male drone exists for is to potentially reproduce with a queen. They only live for about three months, and they must congregate where the queen is, then attempt to mate. A few drones, about one in 1,000, will successfully reproduce. The rest will miss their chance and likely die, their life purpose unfulfilled.
Those who succeed experience the most explosive mating ritual . It may only last a few seconds, but once the male successfully penetrates the queen, the chest muscles put pressure on his penis so that he ejects the necessary genetic material with enough force that the penis itself is pulled right out of the bee's body and remains inside the queen. .
8. The Caribbean Sea makes a whistling sound that can be heard in space
There are a lot of noises in the world that come from mundane, natural phenomena. The wind can howl in a cave, a rock can rumble and crack as the temperature changes, and while it may sound vaguely ominous to the human ear, that's just the way the world works. That's probably the best way to cope with the knowledge that the Caribbean Sea whistles.
Based on decades of research, scientists have noticed that something called a Rossby wave, which is a large wave moving westward, has an unusual interaction with the ocean floor. This causes the wave to die out and then reappear further away. While most waves die out, some survive and create fluctuations so powerful that they actually affect the Earth's gravitational field.
The oscillations, called "sloshing," occur every 120 days. The sound they produce, a whistling sound, is A-flat and can be picked up by satellites in space, although it is actually below the audible range that the human ear can detect.
7. Number stations produce mysterious radio signals
If you've ever watched the TV series Lost, you're all too familiar with the idea of mysterious numbers that may have great and important meaning in the world. And who knows, maybe the digital stations are telling us the entire combination to a secret vault, or the identity of some mysterious person, or the code for the end times. Or maybe it's just spy stuff.
Sometime during the Cold War, shortwave radio operators began picking up strange transmissions. Sometimes they would play short pieces of music, but mostly they were just lists. Letters or numbers, spoken by men, women, sometimes even children. Nothing else. The numbers seemed random.
To this day station numbers still exist. They still broadcast what may or may not be coded messages, and the mystery of who is sending them and to whom they are being sent remains.
It is believed that this connection with spies from other countries where normal communication is impossible. The shortwave radio is simply switched off, it is not tracked, modified or intercepted. The receiver is untraceable because anyone with a radio can hear it. They just need to know what the code means, and for everyone else it is cryptic gibberish.
6. You can hear the giant Gippsland earthworm moving in its tunnels
While it’s not a hard and fast rule, it’s often the case that the bigger something gets in nature, the creepier it becomes. Even small, seemingly innocent animals become terrifying when they get big enough. So when you hear about a creature called the giant Gippsland earthworm, you might already be feeling a little on edge. The longest one ever discovered was 13 feet long , and that makes it even more unpleasant.
The common worm has the good qualities to at least move quietly, but not as quietly as the giant Gippsland worm. Not only can you hear these creatures moving in their underground burrows and tunnels, they actually very loud and they sound very much like they have digestive problems. The sound is a gurgling, slurping, gurgling noise that comes from underground, so you never see the source, you just hear it under your feet as you walk.
5. The acoustics in part of the Central Station allow you to hear whispers in the room
Traditionally, if you don't want someone nearby to hear you, you whisper. Whispering is a surefire way to keep things secret and/or make yourself look even more suspicious in front of others who now know you're saying something but are trying to make sure they don't hear it. It's also polite in the library or during a really boring work meeting.
Head to the dining room on Central Station New York City, and you'll find that whispering is no secret, at least in one part of the building. There's whispering gallery , a place where you can hear whispers from across the room, even over the noise of the crowd, if you put your ear to the wall.
If one person is standing against the wall of the arch and a friend is walking in the opposite direction, they can maintain a conversation thanks to smart acoustics, despite the fact that there is a whole crowd of people between them.
4. You can hear the sound of a sea urchin grinding its teeth on the rocks.
Sea urchins look like little aquatic cacti covered in spines, even though they are animals. And underneath that spiky, plant-like exterior, there is more to them than most of us realize. For example, if you turn a sea urchin over, you will see a tiny hole on the underside, which is the urchin's mouth. And in its mouth, it has tiny calcite teeth that it uses to cut through rocks and miraculously self-sharpening all the time, so it never gets dull.
Equally remarkable is that this process involved grinding these teeth, and the sound could be heard. It is described as part of the surrounding sound ocean, when small urchins chew on rocks to cut out holes in which to hide.
3. You can hear caterpillar poop
There are countless sounds in the natural world that we all recognize. A cow mooing, a duck quacking, and so on. Even some insects are easy to recognize by sounds like a bee buzzing or a cricket chirping. But what sound does a caterpillar make? Traditionally, not much. And it turns out that's only because we haven't been listening closely enough, or in large enough groups. If you try hard enough, you can hear caterpillars pooping.
In the case of the gypsy moth caterpillar, you don't necessarily hear a grunt or other biological sound. Gypsy moth caterpillars have a habit of reproducing in in huge quantities . Some years, thousands of them can swarm an area. When this happens, there can be so many of them in one place that the sound you hear is like spanking thousands of caterpillar excrements falling to the ground like the soft patter of rain.
2. Some types of tinnitus can be heard by outside listeners.
William Shatner is known to have suffers from tinnitus due to an accident on the set of the original series "Star Trek" back in 1969. Explosion special effects damaged the hearing of both Shatner and Leonard Nimoy, leaving him with what he described as a static hissing in his ears that continues to this day. This is what people with tinnitus typically experience, a ringing or hissing sound that does not come from an outside source.
There is one type of tinnitus that is much more unusual than the others, which is sometimes called objective tinnitus . This type produces a sound that someone else can hear. It usually requires a stethoscope, but in some cases it can be heard simply by placing your ear next to the person suffering from it, like listening to a seashell on the beach.
Venous tinnitus is one of the specific forms of objective tinnitus that can be heard by outside listeners. It is caused by changes in blood flow , often due to anemia. Essentially, you hear your own blood in your veins, and you usually notice it more in your right ear than your left.
1. Perseverance recorded the sound of Mars in 2021
One of the most amazing things you can ever hear as a human, as a thinking, living being on planet Earth, is the sound of another world. Maybe in 1,000 years, it will be as boring as listening to the wind at home. But right now, today, when no human has ever set foot on an alien world, it’s pretty amazing. And thanks to NASA’s Perseverance rover, we actually have access to the sounds of Mars.
In February 2021, the first ever cases were registered martian sounds , giving scientists the opportunity to study the red planet's acoustic landscape. The idea was that they could gather new information about the planet to help us understand it better. After all, every little bit helps. If the planet had a pervasive dance rhythm in the background, that would be a significant find.
Despite what you might think, the rover's two microphones have not been recycled in the slightest. In fact, they were off the shelf and are available for purchase. You can listen yourself sounds and hear the Martian wind, as well as the sounds of the rover, including the sound of lasers firing at rocks. In practice, it's not very exciting, the sounds aren't very unusual, but the idea of hearing something in the atmosphere that changes the way sound works compared to what we hear on Earth is pretty amazing.
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