Blocking sound with holes.

• Autores: Charles Q. Choi
• Localización: Scientific American, ISSN 0036-8733, Vol. 299, Nº. 6, 2008, págs. 42-42
• Idioma: inglés
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• Resumen

  • This article discusses research, published in the August 22, 2008 issue of "Physical Review Letters," indicating that an object with holes in it can deaden sound more effectively than a solid object. The researchers studied the effect of a perforated aluminum plate on ultrasonic waves traveling through water. When the holes matched the wavelength of the sound they generated interference that modulated the sound waves.