A Method of Improving Remote Reproduction of a Sound Field by One-Third-Octave Analysis and Digital Filtering

Abstract

This Memorandum describes work done to improve the measure of agreement between a target one-third-octave spectrum and its reproduction via some remote sound source. Digital filters create limited bandwidth data which are modified and finally recombined to produce a new time history. Studies of certain fixed and rotary wing aircraft have shown mean errors significantly reduced by this technique. Great Britain.

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Document Details

Document Type
Technical Report
Publication Date
Oct 01, 1987
Accession Number
ADA196064

Entities

People

  • J. B. Collister

Organizations

  • Royal Aircraft Establishment

Tags

Communities of Interest

  • Air Platforms
  • Materials and Manufacturing Processes

DTIC Thesaurus Topics

  • Aircraft Noise
  • Aircrafts
  • Amplifiers
  • Bandpass Filters
  • Bandwidth
  • Difference Equations
  • Digital Filters
  • Equations
  • Filters
  • Filtration
  • Frequency
  • Frequency Bands
  • Low Pass Filters
  • Noise
  • Rotary Wing Aircraft
  • Tape Recording
  • Transfer Functions

Readers

  • Acoustical Oceanography.
  • Image Processing and Computer Vision.
  • Systems Analysis and Design