Recent Comments

    acoustic metamaterial tagged posts

    New ‘Acoustic Metamaterial’ Cancels Sound

    March 10, 2019, Categories  Physics

    The mathematically designed, 3D-printed acoustic metamaterial is shaped in such a way that it sends incoming sounds back to where they came from, Ghaffarivardavagh and Zhang say. Inside the outer ring, a helical pattern interferes with sounds, blocking them from transmitting through the open center while preserving air’s ability to flow through.
    Credit: Photo by Cydney Scott for Boston University

    Mechanical engineers create synthetic, sound-silencing structure that blocks 94% of sounds. Researchers have demonstrated it’s possible to silence noise using an open, ringlike structure, created to mathematically perfect specifications, for cutting out sounds while maintaining airflow.

    “Today’s sound barriers are literally thick heavy walls,” says Ghaffarivardavagh...

    Read More

    Sound-Shaping Super-Material invented

    February 27, 2017, Categories  Physics, Technology/Electronics

    1. Metamaterial bricks are assembled into a layer to produce a meta-surface, which could have applications across healthcare and entertainment 2, These space coiling bricks act to slow down sound waves, meaning that they can be transformed into any required sound field.

    1. Metamaterial bricks are assembled into a layer to produce a meta-surface, which could have applications across healthcare and entertainment
    2, These space coiling bricks act to slow down sound waves, meaning that they can be transformed into any required sound field.

    A super-material that bends, shapes and focuses sound waves that pass through it has been invented by scientists. Metamaterials have already shown remarkable results with light manipulation, allowing scientists to create a real-life version of Harry Potter’s invisibility cloak, for example. But a Universities of Sussex and Bristol team have now shown that they also work with sound waves, which could transform medical imaging and personal audio.

    Finely shaped sound fields are used in medical imaging and therapy as well as in ...

    Read More