AUDITORY INTENSITY DISCRIMINATION AS A FUNCTION OF STIMULUS PRESENTATION METHOD

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Abstract:

Relative differential intensive limens were obtained at three frequencies and two intensities for three stimulus patterns involving fluctuation of a steady tone and three patterns involving separate stimuli. The same observers were utilized in all cases in Experiment I, signals were presented through earphones. Somewhat lower thresholds were obtained for fluctuating intensity patterns than for separate stimuli patterns, thresholds tended to be lower at the high intensity level, and thresholds tended to be lower at the higher intensity level, and thresholds were lower for patterns allowing greater opportunity for comparison within the patterns. When similar thresholds were obtained for patterns presented through speakers Experiment II , thresholds were smaller, the influence of intensity was smaller, and the influence of presentation pattern type was less consistent. Significance of the findings is discussed. Author

Author(s):
Loeb, Michel ; Hawkes, Glenn R.
Author Organization(s):
ARMY MEDICAL RESEARCH LAB FORT KNOX KY
Annotation:
an experiment to determine whether the relative differential limen for auditory intensity changes with type of discrimination, sensation level, frequency, and number of comparison cycles. presentation of stimuli through earphones and through speakers. equal judgments allowed and doubtful ones precluded.
Pagination:
0013

Security Markings

DOCUMENT & CONTEXTUAL SUMMARY

Distribution:
Approved For Public Release, Document Partially Illegible
Distribution Statement:
Document Partially Illegible.

RECORD

Collection: TR
Identifying Numbers
Report Number(s):
USAMRL-542
 Subject Terms
Communities of Interest:
No COI(s) Identified
Descriptor(s):
*HEARING, FREQUENCY, HUMANS, EARPHONES, INTENSITY, LOUDSPEAKERS
Report Date:
1962 Jun 25
Creation Date:
1963 Jan 15