Accession Number : ADA132744

Title :   The Detectability of Repetitive, Periodic Impulses.

Descriptive Note : Final rept. 1 Feb 80-31 Jan 83,

Corporate Author : BOLT BERANEK AND NEWMAN INC CANOGA PARK CA

Personal Author(s) : Horonjeff,Richard ; Fidell,Sanford ; Green,David

PDF Url : ADA132744

Report Date : May 1983

Pagination or Media Count : 61

Abstract : Concern for predicting aural detectability of complex natural sounds has generally focused on steady state tonal and broadband signals. Procedures for calculating detectability of such signals are reasonably well established and validated. Large errors of prediction may occur, however, when these procedures are applied to other classes of signals, such as high crest factor, short duration, impulsive wavetrains. The experimentation described here was intended to support analyses of detection performance that could lead to general quantitative procedures for predicting the audibility of repetitive, periodic impulsive signals. Three separate studies were conducted using similar procedures. The first study quantified the detectability of individual impulses. The second study was directed toward the detectability of multiple impulses of varying periodic repetition rates. The third study explored hypotheses about detection strategies suitable for modelling the audibility of repetitive impulsive wavetrains.

Descriptors :   *Hearing, *Sound, *Impulse noise, *Auditory signals, Auditory perception, Detection, Auditory signals, Broadband, Sound waves, Repetition rate, Periodic variations, Narrowband, Wavefronts, Mathematical analysis, Mathematical models, Frequency, Time intervals

Subject Categories : Psychology
      Anatomy and Physiology
      Acoustics

Distribution Statement : APPROVED FOR PUBLIC RELEASE