It does the same job, while being 10 times thinner and much cheaper.
How it forms, how we hear it, and what it can do.
Our brains are really good at sifting through information.
Don’t read this if you’re not in the mood to sing to yourself. Seriously.
It can manipulate objects in complex patterns for only 10 bucks.
Climate change is creating super corridors for sound waves beneath the Arctic.
A whole new world of signal processing may be just around the corner.
Why you can never hear your own, real voice without assistance (recording yourself) has to do with how sound reaches your inner ear. Basically, your inner ear picks up acoustic vibrations like the chirping of birds, rattle of the city or people’s voices and translates these vibrations into electrical signals that the brain can process as “sound”. The inner ear, however, also picks up vibrations conducted by the bones in your neck and head. This combination of internal and external vibrations produces an uniquely characteristic voice which you won’t ever be able to hear elsewhere!
We all need a bit of quiet in our lives sometimes, but have you ever took a minute to ponder what ‘total silence’ might feel like? It’s scary. Every bodily function, otherwise unnoticed, now sounds like a freight train. Feels like it, anyway. You can even hear your heart beats. Though not exactly ‘perfect silence’, a team of researchers at Hong Kong University of Science and Technology have come mighty close. They report 99.7% absorption of low frequency pressure waves (sound) using subwavelength structures or materials.
A chance discovery has provided experimental evidence that stars may generate sound. While he was examining the interaction of an ultra-intense laser with a plasma target, John Parsley from the University of York found that interfering plasma generates a series of pressure pulses – in other words, sounds.
A very simple, yet effective optical technique was demonstrated that can transform video inputs, such as the motion of a piece of paper, into audio. To achieve this, the researchers involved exploited a simple principle that describes how sound waves causes objects in their path to vibrate. If you reverse engineer the vibrations, you can effectively decode the sound source
Researchers at the Hong Kong University of Science and Technology have created a thin metamaterial surface that is capable of absorbing nearly all of the acoustic energy (sound). Unlike conventional sound absorbing material that is sometimes only effective when meters thick, the metasurface is deeply “subwavelength” and therefore much thinner. There’s a catch though: the system has been demonstrated for near perfect sound absorption
Listening to loud music has been shown time and time again to affect hearing in a negative way. The damage becomes more pronounced with age, leading to difficulties in understanding speech. A new analytic study by researchers at University of Leicester examined the cellular mechanisms that underlie hearing loss and tinnitus triggered by exposure to loud sound. Music to your ears
Rave parties go crazy when the bass drops, no doubt about it, but what makes people click so well with low frequencies? Canadian scientists at the McMaster Institute for Music and the Mind investigated how our brains react to low-freq pitches and found our affinity has to do with how humans detect rhythm. Basically, the bass is easier to follow, so more
Listening to a high pitched tune will enhance the sweetness of food, while a low hum will make your taste buds signal bitter. Obviously, listening to all low frequencies won’t turn your chocolate bar into a pickled vegetable, but research in this respect suggests there’s genuine synesthetic behaviour. Some restaurant owners are already exploiting this knowledge and play ambient music
Using relatively simple perforated sheets of plastic and an extensive amount computation, Duke University researchers have created the world’s first sound invisibility cloak. The cloak diverts sound waves in a way that it conceals both itself, and anything hidden beneath it. The device is, of course, 3D, and it works in the same way, no matter what direction the sound
Ghastly nails on a blackboard or deafening sires don’t come any close to a infant’s whining as far as annoying sounds are concerned, according to a recent study from SUNY New Paltz. In a fairly simple approach, researchers asked study participants to solve various math problems while a background noise was playing. Six sounds were chosen, namely screeching saw on