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It can be hard to roll out of bed and get your day started, but a good Bluetooth alarm clock can help make it much more pleasant. The best Bluetooth alarm clocks do so much more than just wake you up ...

The new, 'ultra-thin' sound diffuser is 10 times thinner than the widely used diffusers found in recording studios, concert venues and movie theaters to reduce echoes and improve the quality of sound.

Sound diffusers based on acoustic metasurfaces can be one order of magnitude thinner than conventional diffusers while retaining comparable performance, Yun Jing and colleagues report in Physical ...