A Comparison of Impedance Measurement Techniques in Air.

Abstract

The acoustic impedance of several Helmholtz resonators were measured using two different techniques. The first technique employed the conventional Standing Wave Tube method. The second was the Dual-Microphone Transfer Function of J. Y. Chung and D. A. Blaser. The calculability of the frequency dependent Helmholtz resonator impedance allowed the methods to be compared for both absolute accuracy and relative precision. The average relative precision for the SWT technique was 4.2% while the average for the dual-microphone technique was 18.4%. (Author)

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Document Details

Document Type
Technical Report
Publication Date
Mar 01, 1984
Accession Number
ADA143638

Entities

People

  • J. T. Mason

Organizations

  • Naval Postgraduate School

Tags

DTIC Thesaurus Topics

  • Accuracy
  • Acoustic Impedance
  • Acoustic Properties
  • Acoustics
  • Coefficients
  • Computer Programs
  • Computers
  • Frequency
  • Materials
  • Measurement
  • Mechanical Impedance
  • Microphones
  • Physics
  • Plastic Explosives
  • Reflection
  • Standing Waves
  • Transfer Functions

Fields of Study

  • Physics

Readers

  • Computational Modeling and Simulation
  • Graph Algorithms and Convex Optimization.
  • Microwave Engineering.