Headphone screening to facilitate web-based auditory experiments.
Headphone screening to facilitate web-based auditory experiments.
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DOI：
10.3758/s13414-017-1361-2
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发表时间：
2017-10
期刊：
影响因子：
--
通讯作者：
McDermott JH
中科院分区：
文献类型：
--
作者：
Woods KJP;Siegel MH;Traer J;McDermott JH
通过互联网远程进行的心理物理实验允许从大量参与者那里收集数据，但牺牲了对声音呈现的控制，因此在听力研究中没有广泛应用。为了帮助标准化在线声音呈现，我们介绍了一个简短的心理物理测试，以确定在线实验参与者是否戴着耳机。听众判断三个纯音中哪一个最安静，其中一个音调在立体声通道中呈现180°异相。这个任务在耳机上很容易，但在扬声器上由于相位消除而很困难。我们在实验室中通过测试戴着耳机或通过扬声器收听的听众来验证测试。筛选测试是有效和高效的，区分两种模式的听力与少量的试验。当在线运行时，获得了一个双峰分布的分数，这表明一些参与者在扬声器上执行任务，尽管指示使用耳机。检测和筛选这些参与者的能力减轻了对在线实验音质的担忧，这是向众包提供的可能性开放听觉感知研究的第一步。
Psychophysical experiments conducted remotely over the internet permit data collection from large numbers of participants, but sacrifice control over sound presentation, and therefore are not widely employed in hearing research. To help standardize online sound presentation, we introduce a brief psychophysical test for determining if online experiment participants are wearing headphones. Listeners judge which of three pure tones is quietest, with one of the tones presented 180° out of phase across the stereo channels. This task is intended to be easy over headphones but difficult over loudspeakers due to phase-cancellation. We validated the test in the lab by testing listeners known to be wearing headphones or listening over loudspeakers. The screening test was effective and efficient, discriminating between the two modes of listening with a small number of trials. When run online, a bimodal distribution of scores was obtained, suggesting that some participants performed the task over loudspeakers despite instructions to use headphones. The ability to detect and screen out these participants mitigates concerns over sound quality for online experiments, a first step toward opening auditory perceptual research to the possibilities afforded by crowdsourcing.
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影响因子：
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