ABSTRACT

Auditory alerts are an essential part of many multi-modal interaction scenarios, particularly in safety and mission critical settings, such as hospitals and transportation. A variety of strategies can be employed in the design of auditory alerts, often orienting manipulation of volume and pitch parameters. However, manipulations by applying a Doppler effect are under-investigated. A perceptual listening test is conducted (n = 100) using multiple alert sounds that are subjected to a variety of volume, pitch, and Doppler manipulations, with the unaltered sounds serving as a benchmark. Applying a mixed methods approach consisting of inferential statistics and thematic analysis, it is found that decreases in volume and a Doppler simulation of a sound moving away reduce importance and urgency, increase safety, are harder to detect, and are perceived as being more distant in perceptions of auditory alerts. Further, increases in volume and a Doppler simulation of a sound approaching are effective in communicating safety, whilst pitch manipulations were much less effective. Further work is required to provide wider, ecologically valid, verification of these findings, particularly as to how listener detection of Doppler and volume manipulations can be improved.

摘要

听觉警报是许多多模式交互方案的重要组成部分，尤其是在安全和关键任务环境中，例如医院和交通运输中。在听觉警报的设计中可以采用多种策略，通常是针对音量和音高参数的操纵。然而，对通过应用多普勒效应进行的操纵的研究不足。使用多种警报声音进行感知听觉测试（n = 100），这些声音会经受各种音量，音高和多普勒操作的影响，而未改变的声音将作为基准。应用由推论统计和主题分析组成的混合方法，发现音量的减小和声音消失的多普勒模拟降低了重要性和紧迫性，增加了安全性，更难发现，并且被认为与听觉警报的距离更远。此外，音量的增大和声音逼近的多普勒模拟在传达安全性方面是有效的，而音调操作的效果则差得多。需要进一步的工作来提供对这些发现的更广泛的，生态上有效的验证，尤其是关于如何改善听众对多普勒检测和音量调节的验证。