Accession Number:

ADA214298

Title:

Dual Task Performance with LPC (Linear Predictive Coding) Degraded Speech in a Sentence Verification Task

Descriptive Note:

Memorandum rept. Oct 1986-Sep 1987

Corporate Author:

NAVAL RESEARCH LAB WASHINGTON DC

Report Date:

1989-10-20

Pagination or Media Count:

11.0

Abstract:

The results of a preliminary study on the effects of reduced speech intelligibility on dual task performance are reported. The speech task was a sentence verification task, and the speech degradation was accomplished using a narrowband digital voice transmission system operating with and without random bit errors. The second task was a visual picture sorting task. There was a dual task decrement on the sorting task, and in addition, there was an further decrease in sorts per minute as the speech was increasingly degraded. Reaction time for the speech task increased with the concurrent sorting task, but the dual task condition did not affect speech task error rates. Keywords Voice communications, Linear predictive coding, Bit errors, Intelligibility, Sentence verification, Reaction time.

Subject Categories:

  • Psychology
  • Voice Communications

Distribution Statement:

APPROVED FOR PUBLIC RELEASE