Hearing Thresholds among Pilots and Non-Pilots: Implications for Auditory Warning Design

Abstract

Observations in simulator studies suggested that the older segments of the General Aviation pilot population were having difficulty hearing specific auditory warnings in the cockpit. These observations, in combination with data from Tobias (1968a; 1968b; 1972), prompted a reexamination of the hearing capabilities of pilots and non-pilots. In Phase 1, threshold data were collected for 150 non-pilots and 150 pilots using stratified age sampling. The usual higher-frequency decrements attributable to aging and general environmental exposure were found in both samples. Significant differences were found between the non-pilot and pilot samples, with greater threshold shifts between 2 and 6 kHz in evidence among the pilots. In Phase 2, individuals were exposed to simulated aircraft engine noise and asked to detect and identify both conventional and novel auditory warning sounds. Results of both phases are discussed in terms of implications for the design of auditory warnings for General Aviation aircraft.

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References

Beringer

D. B.

Harris

H. C.

Jr. (1997). Automation in General Aviation: Two studies of pilot responses to autopilot malfunctions. FAA Office of Aviation Medicine, TR DOT/FAA/AM-97/24. Springfield, VA: National Technical Info. Service.

Edworthy

Loxley

Dennis

(1991). Improving auditory warning design: Relationship between warning sound parameters and perceived urgency. Human Factors, 33(2), 205–231.

Edworthy

(1994). The design and implementation of non-verbal auditory warnings. Applied Ergonomics, 25(4), 202–210.

Hellier

E. J.

Edworthy

Dennis

(1993). Improving auditory warning design: Quantifying and predicting the effects of different warning parameters on perceived urgency. Human Factors, 35(4), 693–706.

Patterson

R. D.

(1990). Auditory warning sounds in the work environment. Phil. Trans. R. Soc. Lond., B 327, 485–492.

Peterson

A. P. G.

Gross

E. E.

Jr. (1972). Handbook of Noise Measurement, 7th ed. New Concord, MA: General Radio Co.

Tobias

J. V.

(1968a). Cockpit noise intensity: Fifteen single-engine light aircraft. FAA Office of Aviation Medicine, TR FAA-FM-68-21. Springfield, VA: National Technical Info. Service.

Tobias

J. V.

(1968b). Cockpit noise intensity: Eleven twin-engine light aircraft. FAA Office of Aviation Medicine, TR FAA-AM-68-25. Springfield, VA: National Technical Info. Service.

Tobias

J. V.

(1972). Auditory effects of noise on air-crew personnel. FAA Office of Aviation Medicine, TR FAA-AM-72-32. Springfield, VA: National Technical Info. Service.