Very low-frequency hydrophone calibration

McEachern, James F.

doi:10.1121/1.391445

Cited by 1 publication

(1 citation statement)

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“…Various methodologies, such as reciprocity or substitution (Bobber, 1988;Smith and Bacon, 1990;Radulescu et al, 2003;Koch and Wilkens, 2004;Veledar, 2009), have been proposed for the kilohertz and megahertz frequency range but few for very low frequencies. Methodologies developed by Levin (1973) andMcEachern (1984) propose a dynamic calibration with a hydrophone displacement in a pressure field, whereas Golenkov and Pavlov (1972) and Zalesak (1999) propose a static one, in which the pressure itself is variable. In the Levin (1973) method, a hydrophone is placed along an inflexible vertical axis that is connected to a wheel and a motor.…”

Section: Introductionmentioning

confidence: 99%

Hydrophone Calibration at Very Low Frequencies

Joubert¹,

Nolet²,

Sukhovich³

et al. 2015

Bulletin of the Seismological Society of America

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We propose a new method to study the response of a hydrophone at very low frequencies. In our method, the hydrophone is placed in a calibration chamber filled with water and, by instantaneously changing the water height, an abrupt pressure increase of about 1000 Pa is produced. The pressure variation mathematically corresponds to an input signal close to a step function. The response is recorded after filtering and digitizing so that we obtain the response of the complete system.We also report on the development of an automatic method to determine the number of poles and zeros and their values that describe the observed response. We apply our method to the RAFOS II

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