An optical fiber infrasound sensor: a new lower limit on atmospheric pressure noise between 1 and 10 Hz.

@article{Zumberge2003AnOF,
  title={An optical fiber infrasound sensor: a new lower limit on atmospheric pressure noise between 1 and 10 Hz.},
  author={Mark A. Zumberge and Jonathan Berger and Michael A. H. Hedlin and E. Husmann and Scott L. Nooner and Richard Hilt and Rudolf Widmer-Schnidrig},
  journal={The Journal of the Acoustical Society of America},
  year={2003},
  volume={113 5},
  pages={2474-9}
}
A new distributed sensor for detecting pressure variations caused by distant sources has been developed. The instrument reduces noise due to air turbulence in the infrasound band by averaging pressure along a line by means of monitoring strain in a long tubular diaphragm with an optical fiber interferometer. Above 1 Hz, the optical fiber infrasound sensor (OFIS) is less noisy than sensors relying on mechanical filters. Records collected from an 89-m-long OFS indicate a new low noise limit in… CONTINUE READING
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