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1 .This is Scientific American's 60-Second Science. I'm Wayt Gibbs.Got a minute?
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2 .I'll never forget the day I saw the first ultrasound image of my peanut-size son-to-be.
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3 .If only the pictures weren't so fuzzy.
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4 .Is it a boy or is that her foot?
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5 .Now physicists at Nanjing University in China have come up with a method to clean up pictures made from high-pitched acoustic waves.
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6 .Think of a one-way mirror, but for sound.
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7 .Their system would let the pressure waves that carry sound pass through if they come from the left.
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8 .But it reflects waves hitting it from the right.
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9 .No known natural material can do this.
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10 .But a metamaterial, a clever arrangement of thin brass plates bent into tiny maze-like shapes has just the right properties.
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11 .The metamaterial can even be tailored to steer the outgoing sound and to filter out all sounds except those of a particular frequency.
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12 .That's just what you want for a sharp ultrasound picture.
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13 .The work appears in Applied Physics Letters.
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14 .The researchers are now building a prototype of their design.
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15 .Maybe one day, the only thing fuzzy about those first fetal photos will be the way they make you feel inside.
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16 .Thanks for the minute, for Scientific American's 60-Second Science. I'm Wayt Gibbs.
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