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Author: Almon J. Bate
Publisher:
ISBN:
Category : Airplanes
Languages : en
Pages : 34
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Book Description
The experiment was designed to compare three types of aircraft cockpit warning systems: (1) Visual: malfunctions simultaneously activated a master warning light and a specific malfunction indicator light. (2) Visual and tone: malfunctions simultaneously activated an intermittent sweeping tone (through earphones), a master warning light, and a specific malfunction indicator light. (3) Visual and voice: malfunctions simultaneously activated a master warning light, a specific malfunction indicator light, and a voice recording which informed the operator through his earphones of the specific malfunction needing attention. Three groups of 11 university students served as subjects. While responding to a visual, visual-tone, or visual-voice warning system, each subject was also required to find and position, under cross hairs, a series of strategic targets on a strip of rear-projected aerial photographic imagery. No statistically significant differences among the three warning systems were found in the speed of reaction to the master warning light, reaction to the specific-indicator panel, total reaction time, or number of strategic targets found or missed. The results of the study suggest that the addition of either a tone or a voice warning to a visual, master plus specific, malfunction warning system is of questionable value in a 'heads-in' cockpit situation where the visual system can be seen. The data from the experiment do not suggest that a voice warning system has any advantage over a simple aural signal for augmenting a visual system. (Author).
Author: Almon J. Bate
Publisher:
ISBN:
Category :
Languages : en
Pages : 48
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Book Description
This study was conducted to determine the relative merits of supplementing aircraft visual/annunciator panel malfunction warning systems with a general alerting tone or with a voice recording identifying specific malfunctions. When a malfunction occurred, subjects pushed the one illuminated switch of sixteen malfunction indicators located on the annunciator panel. Subjects also performed a navigation task in which they momentarily positioned, under cross hairs, a series of navigational checkpoints displayed on rear-projected aerial strip photography. The photographic imagery moved across a 10-by-10-inch viewing screen at three simulated aircraft speeds: 340, 1160, and 2260 knots. One malfunction warning occurred during the last half of each test period. Although navigation performance (number of navigational checkpoints detected) decreased as simulated speed increased, this performance did not vary with the warning systems. The strictly visual annunciator panel malfunction warning system was the poorest system tested. The addition of a general alerting tone resulted in quicker and usually less variable responses at all aircraft speeds than did any of the other systems. (Author).
Author: Almon J. Bate
Publisher:
ISBN:
Category : Airplanes
Languages : en
Pages : 34
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Book Description
The experiment was designed to compare three types of aircraft cockpit warning systems: (1) Visual: malfunctions simultaneously activated a master warning light and a specific malfunction indicator light. (2) Visual and tone: malfunctions simultaneously activated an intermittent sweeping tone (through earphones), a master warning light, and a specific malfunction indicator light. (3) Visual and voice: malfunctions simultaneously activated a master warning light, a specific malfunction indicator light, and a voice recording which informed the operator through his earphones of the specific malfunction needing attention. Three groups of 11 university students served as subjects. While responding to a visual, visual-tone, or visual-voice warning system, each subject was also required to find and position, under cross hairs, a series of strategic targets on a strip of rear-projected aerial photographic imagery. No statistically significant differences among the three warning systems were found in the speed of reaction to the master warning light, reaction to the specific-indicator panel, total reaction time, or number of strategic targets found or missed. The results of the study suggest that the addition of either a tone or a voice warning to a visual, master plus specific, malfunction warning system is of questionable value in a 'heads-in' cockpit situation where the visual system can be seen. The data from the experiment do not suggest that a voice warning system has any advantage over a simple aural signal for augmenting a visual system. (Author).
Author: Paul Kemmerling
Publisher:
ISBN:
Category : Airplanes
Languages : en
Pages : 56
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Book Description
The study was designed to create a flight condition that would be sufficiently stressful, and at the same time, require the pilot to direct his attention out of the cockpit for relatively long periods, so that an adequate comparison could be made between voice and tone warning.
Author: Joseph Dennis Mazza
Publisher:
ISBN:
Category : Airplanes
Languages : en
Pages : 0
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Book Description
An experiment was performed in which seventeen subjects responded to warning signals presented on displays simulating integrated and conventional aircraft cockpit warning systems. Performance using the conventional system was superior in terms of both mean reaction time and number of errors committed. (Author).
Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 72
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Author: Robert J. Randle
Publisher:
ISBN:
Category : Aeronautics
Languages : en
Pages : 74
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Author: J. E. Veitengruber
Publisher:
ISBN:
Category :
Languages : en
Pages : 148
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Author: David E. Thorburn
Publisher:
ISBN:
Category : Aeronautics
Languages : en
Pages : 0
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Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 28
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In support of the F/FB/EF-111 Digital Flight Control System Program Office, the present human engineering study evaluated the merits of voice versus tone warning systems in tems of pilot response time and response accuracy performance. Task loading and background communication were two other variables that were evaluated. Non-significant study results for the warning systems found in this study, suggest that for this small number of messages (four), neither a voice or a tone warning system has an advantage over the other. However, based on the present and previous research in the area of warning systems, and considering the total number of tone messages in the F-111, the long term benefits of implementing a voice warning system may be great in terms of reducing pilot workload. These study results demonstrated statistically significant main effects for task loading and background communication. Therefore, these results suggest that specifying pilots' response times for a time critical system, such as a ground collision advisory system, may require further consideration of relevant factors that have a significant influence on human reaction and response times. (FR).
Author:
Publisher:
ISBN:
Category : Airplanes
Languages : en
Pages : 250
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Book Description
