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Sound Quality of Audible Warning Devices
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English
Abstract
A large-size truck is equipped with a variety of audible warning devices. These warning devices are grouped into three categories by their usage, i.e., malfunction type, proximity type and attention type. The sound characteristics of warning sound that are investigated for each type are signal envelope, fundamental frequency and the number of harmonics. Many sounds are synthesized with nine fundamental frequencies, ten or fewer harmonics and two signal envelopes. With volume fixed, these sounds are evaluated using an unpleasantness rating scale, and the functional impression of these sound is also chosen. From the results, the range of fundamental frequencies, the number of harmonics and the shapes of signal envelopes for preferable sound quality are determined.
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Topic
Citation
Nishida, T. and Hagiwara, B., "Sound Quality of Audible Warning Devices," SAE Technical Paper 931346, 1993, https://doi.org/10.4271/931346.Also In
References
- Egawa:The study of evaluation of warning sound of automatic guided vehicle, human engineering 23 1987
- Sasahara et.al Selection for warning sound of handy fire alarm Fire 35 6 1985
- Antin J.F. et.al. The intensity of auditory warning tones in the automobile environment:detection and preference evaluation Applied Ergonomics February 1991