Air transparent soundproof window

Sang-Hoon Kim; Seong-Hyun Lee

Air transparent soundproof window

Materials Science 2013-07-02 v1

Authors: Sang-Hoon Kim , Seong-Hyun Lee

Abstract

A soundproof window or wall which is transparent to airflow is presented. The design is based on two wave theories of diffraction and acoustic metamaterials. It consists of a three-dimensional array of strong diffraction-type resonators with many holes centered at each individual resonator. The acoustic performance levels of two soundproof windows with air holes of $20mm$ and $50mm$ diameters were measured. Sound waves of 80dB in the frequency range of $400 - 5,000Hz$ were applied to the windows. It was observed that the sound level was reduced by about $30 - 35$ dB in the above frequency range with the $20mm$ window and by about $20 - 35$ dB in the frequency range of $700 - 2,200Hz$ with the $50mm$ window. It is an extraordinary acoustic anti-transmission. The geometric factors which produced the effective negative modulus were obtained.

Keywords

acoustics microwave resonators

Cite

@article{arxiv.1307.0301,
  title  = {Air transparent soundproof window},
  author = {Sang-Hoon Kim and Seong-Hyun Lee},
  journal= {arXiv preprint arXiv:1307.0301},
  year   = {2013}
}

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4 pages, 6 figures, 1 table

Air transparent soundproof window

Abstract

Keywords

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