Laser biospeckle metrology in investigating plant-sound interactions

Minoru Hirai, Daiki Endo, Hiroki Gonome, Takahiro Kono, Jun Yamada, Uma Maheswari Rajagopalan

研究成果: Conference contribution


In recent years, it has been found that sound also has effect on plant growth and its yield with certain sound directing the seedling of corn toward the sound source and its ability in distinguishing stuttering of larvae from other sounds. However, methods investigating the effects of sound either take a long time or destructive. Here, we have used laser biospeckle, a non-destructive and non-contact technique to investigate the activities of an arugula plant (2-4 weeks old) under sounds of different frequencies of 0 Hz or control, 100 Hz, 1 kHz, 10 kHz. Laser biospeckle has been proved to be valid for investigating the aging of fruits, believed to be due to the movement of water, organelles etc. Biospeckle activities were recorded for 20 sec at 15 fps following exposure to sounds for 1min. The correlation parameter (r) of biospeckle activity was used to characterize the activity of the plant with r being 1 for highly active and 0 for reduced plant activity. Sound level of 100 dB was the same for all frequencies. There was a clear difference in r between the control and other frequencies and r was lower than that of control indicating a reduction in the activity. Moreover, r for 100 Hz was found to be closer to control while at higher frequencies, r was much lower indicating a dependence of the activity on the frequency.

ホスト出版物のタイトルOptical Interactions with Tissue and Cells XXXI
編集者Bennett L. Ibey, Norbert Linz
出版ステータスPublished - 2020
イベントOptical Interactions with Tissue and Cells XXXI 2020 - San Francisco, United States
継続期間: 2020 2月 12020 2月 2


名前Progress in Biomedical Optics and Imaging - Proceedings of SPIE


ConferenceOptical Interactions with Tissue and Cells XXXI 2020
国/地域United States
CitySan Francisco

ASJC Scopus subject areas

  • 電子材料、光学材料、および磁性材料
  • 生体材料
  • 原子分子物理学および光学
  • 放射線学、核医学およびイメージング


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