Journal of Marine Science and Application

, Volume 16, Issue 3, pp 370–374 | Cite as

Method for measuring self-noise of vector hydrophones

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Abstract

The Vector Hydrophone (VH) is widely used to remotely detect underwater targets. Accurately measuring the self-noise of the VH provides an important basis for evaluating the performance of the detection system in which it is utilized, since the ability to acquire weak signals is determined by the VH self-noise level. To accurately measure the VH self-noise level in actual working conditions, the Dual-channel Transfer Function Method (DTFM) is proposed to reduce ambient background noise interference. In this paper, the underlying principles of DTFM in reducing ambient background noise is analyzed. The numerical simulations to determine the influence of ambient background noise, and the sensitivity difference of the two VHs on the measurement results are studied. The results of measuring the VH self-noise level in a small laboratory water tank by using DTMF indicate that ambient background noise interference can be reduced effectively by employing DTMF, more accurate self-noise level can be obtained as well. The DTMF provides an effective method for accurately measuring the self-noise level of VHs and also provides technical support for the practical application of the VH in underwater acoustics.

Keywords

self-noise vector hydrophone acoustic measurement underwater transducer transfer function method 

非线性内波引起的浅水模式演化研究

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Copyright information

© Harbin Engineering University and Springer-Verlag GmbH Germany 2017

Authors and Affiliations

  1. 1.Science and Technology on Underwater Acoustic LaboratoryHarbin Engineering UniversityHarbinChina
  2. 2.College of Underwater Acoustic EngineeringHarbin Engineering UniversityHarbinChina

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