リトロリフレクタを用いた光波マイクロホンの独立成分分析による SN 比改善

DOI

書誌事項

タイトル別名
  • Improvement of SN Ratio by Independent Component Analysis on Optical Wave Microphone with Retroreflector

抄録

An Optical wave microphone is proposed as a new sound detection method. The Optical wave microphone measures sound waves by observing the weak diffraction light generated when laser light is affected by sound waves. Therefore, it can be used in locations where laser light is transmitted without disturbing the sound field. In addition, since no objects are used in the sound-receiving part, it can be used near equipment that generates a lot of electromagnetic waves, such as MRIs, in environments with severe temperature and humidity, and in intense air currents. However, due to the characteristics of the Optical wave microphone, the noise level is high, and there is an urgent need to improve the signal-to-noise ratio for practical use. In previous studies, it has been confirmed that the use of a retroreflector amplifies diffracted light, and that independent component analysis (ICA) shows good results. In this study, we succeeded in improving the signal-to-noise ratio of an Optical wave microphone using a retroreflector by ICA with principal component analysis (PCA) as a pretreatment.

収録刊行物

キーワード

詳細情報 詳細情報について

  • CRID
    1390015133365842048
  • DOI
    10.24466/pacbfsa.35.0_b-3
  • ISSN
    24242586
    13451510
  • 本文言語コード
    ja
  • データソース種別
    • JaLC
  • 抄録ライセンスフラグ
    使用不可

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