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The electromagnetic spectrum consists of all the types of electromagnetic radiation arranged according to their frequency and wavelength. Each of the various colors of visible light has specific frequencies and wavelengths associated with them, and you can see that visible light makes up only a small portion of the electromagnetic spectrum. Because the technologies developed to work in various parts of the electromagnetic spectrum are different, for reasons of convenience and historical...
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Electromagnetic and acoustic double-shielding graphene-based metastructures.

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This study introduces a novel graphene and honeycomb metastructure for simultaneous electromagnetic interference (EMI) and acoustic shielding. The double-shielding material effectively mitigates both electromagnetic waves and sound pollution.

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Area of Science:

  • Materials Science
  • Acoustics
  • Electromagnetism

Background:

  • Increasing concerns regarding acoustic and electromagnetic pollution necessitate advanced shielding solutions.
  • Existing materials offer either electromagnetic interference (EMI) shielding or acoustic insulation, but not both.
  • A dual-function shielding structure is crucial for comprehensive environmental protection.

Purpose of the Study:

  • To develop a novel metastructure capable of providing both electromagnetic and acoustic shielding.
  • To evaluate the shielding effectiveness of the proposed material against electromagnetic waves and sound.
  • To demonstrate the practical application of the double-shielding metastructure.

Main Methods:

  • Fabrication of a unique metastructure using graphene paper and artificial honeycomb.
  • Measurement of electromagnetic interference (EMI) shielding effectiveness across a wide frequency range (2.6–26.5 GHz).
  • Assessment of acoustic shielding effectiveness within the low-frequency spectrum (200–1500 Hz).

Main Results:

  • The metastructure achieved an EMI shielding effectiveness of up to 74 dB.
  • Acoustic shielding effectiveness reached 25 dB between 200 and 1500 Hz.
  • Exceptional acoustic shielding of up to 40 dB was observed at 200 Hz.

Conclusions:

  • The developed graphene-honeycomb metastructure demonstrates high performance in both electromagnetic and acoustic shielding.
  • This novel material offers a promising solution for combating combined electromagnetic and acoustic pollution.
  • The double-shielding capability makes it suitable for diverse applications requiring protection from both wave types.