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Materials

Acoustic metasurface design completely absorbs low frequency sound

Absorbing low frequency sound is a big job, or at least, a job for big things. Acoustic absorption systems require big resonant cavities with large amounts of heavy damping material and significant surface areas to work efficiently. Consequently, the sound-deadening systems used in music studios and anechoic chambers take up a lot of room. Now scientists have flipped this notion on its head by designing coiled metasurfaces that not only completely absorb low frequency sounds, but are a tiny fraction of the size of traditional sound-absorbing systems.Read More

Around The Home

Snooz sound helps you sleep sound

Have you ever found that the sound of a fan has helped you drift off to sleep? Well a new device is inspired by just that phenomenon. The Snooz is described as an "an ultra-portable sound conditioner." It sits next to your bed and contains a controllable fan aimed at blocking out background noise.Read More

Electronics

Sensor detects sound direction and cuts background noise

Although the ability tends to wane as we get older, the human auditory system is pretty good at filtering out background noise and making a single voice able to be understood above the general hubbub of a crowded room. But electronic devices, such as smartphones, aren't quite as gifted, which is why getting Siri or Google Now to understand you in crowded environments can be an exercise in futility. But now researchers have developed a prototype sensor that’s not only able to figure out the direction of a particular sound, but can also extract it from background noise.

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Home Entertainment Review

Review: Nano HiFi NH1 Bluetooth boombox

The world of products competing for your ears these days is incredibly crowded, from the multitude of budget Bluetooth speakers on up to Sonos and others aiming to drag your dad's treasured hi-fi into the 21st century with top-notch wireless sound. The Nano HiFi NH1 falls somewhere toward the latter end of the spectrum, but maintains a notable level of portability and affordability. Gizmag had the opportunity to play part of our northern summer soundtrack over this nifty setup and we came away with this review.

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