Transmission of Background Conversation by the TA-341 Telephone Set. The Problem and Proposed Solutions.

Abstract

The purpose of this experiment was to examine the degree to which the TA-341 telephone set picks up background conversation and to test some alternative handset and headset configurations to determine whether hardware either currently in use by the Army or other commercially available equipment could offer a practical solution to the problem. Eight passive devices were examined in detail and were evaluated in terms of their ability to reject background conversation without affecting the intended communication. None proved successful. Therefore, an active device-an electronic program expander (EPEX)-was built and tested. It demonstrated a high degree of success in meeting the requirements against which the passive devices had been tested. Details both of the operational characteristics and of the circuit design of EPEX are reported. (Author)

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Document Details

Document Type
Technical Report
Publication Date
Apr 01, 1978
Accession Number
ADA055344

Entities

People

  • James C. Geddie
  • Joel T. Kalb

Organizations

  • Human Engineering Laboratory

Tags

Communities of Interest

  • Advanced Electronics
  • Human Systems

DTIC Thesaurus Topics

  • Acoustic Absorption
  • Acoustics
  • Amplifiers
  • Analysis Of Variance
  • Anechoic Chambers
  • Attenuation
  • Engineering
  • Frequency
  • Frequency Response
  • Hearing Loss
  • Human Factors Engineering
  • Impedance
  • Losses
  • Microphones
  • Sound Pressure
  • Test And Evaluation
  • Word Lists

Readers

  • Software Engineering
  • Speech Processing/Speech Recognition.
  • Systems Analysis and Design

Technology Areas

  • Microelectronics
  • Microelectronics - Microelectromechanical Systems