Evaluation of a Wireless Tongue Tracking System on the Identification of Phoneme Landmarks.
Evaluation of a Wireless Tongue Tracking System on the Identification of Phoneme Landmarks.
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DOI：
10.1109/tbme.2020.3023284
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发表时间：
2021-04
期刊：
影响因子：
--
通讯作者：
Inan OT
中科院分区：
文献类型：
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作者：
Sebkhi N;Santus N;Bhavsar A;Siahpoushan S;Inan OT
评估基于永磁体定位的舌头跟踪系统的准确性，以生成音素地标的基线。界标的位置可变性提供了跟踪误差的间接测量，以估计附着在舌头上的小示踪剂的位置。还首次尝试创建独立于受试者的（通用）基线。从10名受试者中收集了2,500条舌头轨迹，这些受试者被要求重复说出10次25个音素。从每个舌头轨迹中识别出一个界标，并通过比较每个重复界标与最终界标的距离来计算跟踪误差，最终界标设置为它们的平均位置。在受试者依赖的基线中，发现跟踪误差在所有音素和受试者中基本一致，小于25%的误差大于5.8 mm（中位数：3.9 mm）。然而，受试者间变异性表明，我们系统的当前限制导致了明显的误差（中位数：55 mm，Q3：65 mm）。在主题相关的情况下报告的跟踪错误证明了我们的系统生成音素地标的基线的潜力。我们已经确定了改进的领域，这将减少受试者相关基线和通用基线之间的差距，同时降低跟踪误差，使其与金标准相当。创建音素标志的基线可以帮助受语音障碍影响的人使用视觉反馈来提高他们的可懂度，该视觉反馈将他们的舌头放置到适当的位置。
Evaluate the accuracy of a tongue tracking system based on the localization of a permanent magnet to generate a baseline of phoneme landmarks. The positional variability of the landmarks provides an indirect measure of the tracking errors to estimate the position of a small tracer attached on the tongue. The creation of a subject-independent (universal) baseline was also attempted for the first time. 2,500 tongue trajectories were collected from 10 subjects tasked to utter 10 repetitions of 25 phonemes. A landmark was identified from each tongue trajectory, and tracking errors were calculated by comparing the distance of each repetition landmark to a final landmark set as their mean position. In the subject-dependent baseline, the tracking errors were found to be generally consistent across all phonemes and subjects, with less than 25% of the errors reported to be greater than 5.8 mm (median: 3.9 mm). However, the inter-subject variability showed that current limitations of our system resulted in appreciable errors (median: 55 mm, Q3: 65 mm). The tracking errors reported in the subject-dependent case demonstrated the potential of our system to generate a baseline of phoneme landmarks. We have identified areas of improvement that will reduce the gap between the subject-dependent and universal baseline, while lowering tracking errors to be comparable to the gold standard. Creating a baseline of phoneme landmarks can help people affected by speech sound disorders to improve their intelligibility using visual feedback that guides their tongue placement to the proper position.