Evaluation of Communication During Active Sonar Transmissions with a Speech-Recognition Model

Abstract

Predictions using the Speech Intelligibility Index (SII) are reported for speech recognition in tonal and broadband noise. Three levels of background pink noise (60, 65, and 70 dBA) were used for the SII. Tones in the frequency range around 1000 Hz at 77, 83, and 89 dB SPL were added to the background pink noise. The speech spectra were for four different vocal efforts (normal, raised, loud, and shouted). The simulated listeners for most of the predictions were assumed to have normal hearing. A hearing loss was also included for a subset of predictions. If 'barely adequate' speech recognition is used as a criterion, the effects of the background noise can be overcome by increasing the vocal effort of the speaker, often to a shout. Speech-recognition, Speech communication, Intense tones, Acoustic habitability standards.

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Document Details

Document Type
Technical Report
Publication Date
Jul 30, 1993
Accession Number
ADA275008

Entities

People

  • Chaslav V. Pavlovic
  • Lynne Marshall
  • Thomas E. Hanna

Organizations

  • Naval Submarine Medical Research Laboratory

Tags

Communities of Interest

  • Biomedical

DTIC Thesaurus Topics

  • Abstracts
  • Active Duty
  • Active Sonar
  • Automated Speech Recognition
  • Background Noise
  • Biomedical Research
  • Broadband
  • Classification
  • Consonants
  • Ear
  • Frequency
  • Frequency Bands
  • Hearing Loss
  • Human Factors Engineering
  • Recognition
  • Security
  • Word Recognition

Readers

  • Acoustics.
  • Speech Processing/Speech Recognition.

Technology Areas

  • AI & ML
  • AI & ML - Bayesian Inference