Soft hydrogel enables transparent, broadband ultrasound in tissue and water (IMAGE)
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The graphic shows how researchers turned a porous hydrogel into a soft acoustic metapad that can both transmit ultrasound efficiently and focus it over a broad frequency range. Designed with a gradient acoustic refractive index, the material is intended for applications that require acoustic transparency, flexible fit and wave control, including biomedical ultrasound and underwater acoustics.
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