Perceptual characteristics of computerized program visualizations can differentially affect detection and localization performance

This paper concerns a study aimed at selection of alarm sounds with improved audible performance characteristics for older listeners over current conventional residential smoke detectors. Many current residential smoke detectors possess alarms that have their primary frequency peak in the 4000 Hz region of the audible spectrum. Additionally, many of these alarms are constant instead of providing temporal modulation of the signal. This study analyzed a variety of alternative sounds for selection as a better choice for an “age sensitive” smoke alarm signal. The study presented a battery of candidate sounds to pairs of subjects aged 65 and older with varying levels of hearing impairment (0 to 45 dB) in their own homes to see which sounds performed best in terms of detection, localization, and perceived attention-getting value. Subjects were placed in various location- and masking-based conditions within their homes during listening periods and subjected to sounds played at a constant level. A computerized system collected response data as the battery of stimuli was presented. The data showed a fairly predictable positive trend in detection and localization performance level as the frequency of the stimuli decreased from 4000 Hz to 500 Hz. The data also showed that pulsed signals were more detectable than steady alarms.

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Improvement of Detection and Localization Performance Using the Receiving Array Response Difference Between Ocean Noise and Signal in Shallow Water

IEEE Access ◽

10.1109/access.2019.2930063 ◽

2019 ◽

Vol 7 ◽

pp. 98474-98485

Author(s):

Tongwei Zhang ◽

Guangjie Han ◽

Zeren Zhou ◽

Jinfang Jiang ◽

Lei Shu

Keyword(s):

Shallow Water ◽

Ocean Noise ◽

Localization Performance ◽

Detection And Localization

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Nodule polarity effects on detection and localization performance in liver CT images

10.1117/12.271281 ◽

1997 ◽

Cited By ~ 8

Author(s):

Richard G. Swensson ◽

Philip F. Judy ◽

Christine Wester ◽

Steven E. Seltzer

Keyword(s):

Ct Images ◽

Liver Ct ◽

Localization Performance ◽

Polarity Effects ◽

Detection And Localization

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Localisation of “unseen” visual stimuli: Blindsight in normal observers?

Swiss Journal of Psychology ◽

10.1024//1421-0185.62.3.159 ◽

2003 ◽

Vol 62 (3) ◽

pp. 159-165

Author(s):

H. Schärli ◽

P. Brugger ◽

M. Regard ◽

C. Mohr ◽

Th. Landis

Keyword(s):

Apparent Motion ◽

Target Stimulus ◽

Visual Stimuli ◽

Normal Subjects ◽

Conscious Awareness ◽

Computer Screen ◽

Subjective Confidence ◽

Localization Performance ◽

Phenomenal Awareness ◽

Detection And Localization

We developed two experiments on normal subjects to simulate “blindsight”, i.e., above chance localization performance of visual stimuli without phenomenal awareness. In both experiments, visual targets were presented on a computer screen at one of six possible locations, followed by a metacontrast mask. Subjects (1) indicated whether they had seen the target stimulus or not, and (2) guessed at which location the stimulus had been presented. Fifty percent were blank trials. We found that even when subjects did not acknowledge the presence of a stimulus, they nevertheless guessed its location with above chance accuracy. Apparent motion improved both detection and localization performance. Subjective confidence was related to stimulus presence and localisation performance. Thus, simulated blindsight appeared to be based on residual conscious awareness.

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