Effect of Air Content on Broadband Noise Measurements in the 1.22-m Diameter Water Tunnel.

Abstract

The effect of air content on broadband radiated noise in the 1.22-m diameter water tunnel was investigated. In addition, tunnel operating pressure was also varied. The transmitting hydrophone was positioned in the tail of an axisymmetric body mounted in the test section. Two receiving transducers were used. Both showed a somewhat systematic change in broadband spectral levels with variations in air content up to 11 parts per million and variations in pressure. (Author)

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Document Details

Document Type
Technical Report
Publication Date
Aug 11, 1981
Accession Number
ADA108540

Entities

People

  • B. E. Robbins
  • D. E. Thompson

Organizations

  • Pennsylvania State University

Tags

Communities of Interest

  • Sensors

DTIC Thesaurus Topics

  • Abstracts
  • Acoustic Measurement
  • Broadband
  • Classification
  • Detectors
  • Frequency
  • Hydrophones
  • Instrumentation
  • Measurement
  • Navy
  • Noise
  • Pennsylvania
  • Radiated Noise
  • Security
  • Transmitting
  • Universities
  • Water Tunnels

Readers

  • Acoustics.
  • Aerodynamics/Aeronautics.
  • Electromagnetic Wave Scattering and Antenna Radiation Engineering