Rate pitch discrimination in cochlear implant users with the use of double pulses and different interpulse intervals
Rate pitch discrimination in cochlear implant users with the use of double pulses and different interpulse intervals
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使用双脉冲和不同脉冲间隔对人工耳蜗用户的音调辨别率进行评估
DOI：
10.1080/14670100.2019.1656847
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发表时间：
2019
影响因子：
--
通讯作者：
Bahmer
中科院分区：
文献类型：
--
作者：
Pieper;S. H. ;Bahmer
与正常听力（NH）听众相比，人工耳蜗（CI）用户的速率音调辨别能力较差。在低脉冲频率下，可察觉差异 (JND) 平均为基本频率的 20%，而 NH 听众可以在 1kHz 时辨别出 0.2% 的小频率差异。最近的研究表明，具有短脉冲间隔 (IPI) 的双脉冲可能对 CI 用户的速率音调辨别产生有益的影响。在第一个实验中，进行了心理物理学测试，以确定是否可以通过应用等幅度和短 IPI 的双脉冲来改善 CI 用户的速率音调。提出了基本速率为 200 和 400pps 的脉冲序列，由单脉冲或双脉冲组成，IPI 为 15、50 和 150μs。在第二个实验中，在由交替的双脉冲和单脉冲组成的脉冲串的节距与由单脉冲组成的脉冲串的节距之间进行成对比较。交替脉冲串的基本速率为 400pps，只有单脉冲的脉冲串的基本速率为 200、300 和 400pps。评估和比较不同刺激类型的响度和音调感知。对于两种脉冲率，单脉冲和双脉冲之间发现了显着的响度差异。双脉冲 IPI 之间的音高辨别 JND 具有很高的受试者间变异性，并且没有发现显着的群体效应。没有受试者报告双脉冲和单脉冲刺激之间的音调变化。相比之下，大多数受试者认识到单脉冲序列和双脉冲和单脉冲交替的脉冲序列之间的音调变化。后者的音调低于单脉冲序列刺激。总而言之，在脉冲串中使用（等幅）双脉冲代替单脉冲不会影响音调感知。相反，具有相同幅度的双脉冲和单脉冲之间的响度不同。
The rate pitch discrimination ability of cochlear implant (CI) users is poor compared to normal-hearing (NH) listeners. At low pulse rates, the just noticeable difference (JND) is on average 20% of the base rate, while NH listeners can discriminate small frequency differences of 0.2% at 1 kHz. Recent investigations suggest that double pulses with short interpulse intervals (IPIs) may have a beneficial effect on rate pitch discrimination in CI users. In a first experiment psychophysical tests were carried out to establish whether rate pitch in CI users could be improved by applying double pulses with equal amplitude and short IPIs. Pulse trains with base rates of 200 and 400 pps, composed of either single pulses or double pulses with IPIs of 15, 50, and 150 μs were presented. In a second experiment pairwise comparisons were carried out between pitch of a pulse train composed of alternating double and single pulses with pitch of pulse trains composed of single pulses. The alternating pulse train had a base rate of 400 pps, the pulse trains with solely single pulses had base rates of 200, 300, and 400 pps. The loudness and pitch perception of the different stimulus types were evaluated and compared. A significant loudness difference was found between single and double pulses for both pulse rates. The JND for pitch discrimination between double-pulse IPIs had a high inter-subject variability, and no significant group effect was found. No subject reported a pitch change between double pulse and single pulse stimulation. In contrast, most of the subjects recognized a change in pitch between single-pulse trains and pulse trains with alternating double and single pulses. The latter was lower in pitch than the single-pulse train stimulation. To conclude, using (equal amplitude) double pulses instead of single pulses in a pulse train does not effect pitch perception. Instead, loudness differs between double pulses and single pulses with the same amplitude.
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影响因子：
2.8
作者：
McKay, CM;Henshall, KR
通讯作者：
Henshall, KR
抖动率音高辨别的心理测量函数
影响因子：
2.8
作者：
A. Bahmer;U. Baumann
通讯作者：
U. Baumann
影响因子：
2.8
作者：
Baumann, U;Nobbe, A
通讯作者：
Nobbe, A
影响因子：
2.8
作者：
Hey, Matthias;Mueller-Deile, Joachim;Killian, Matthijs
通讯作者：
Killian, Matthijs
DOI：
10.1121/1.4900917
发表时间：
2014-12
期刊：
The Journal of the Acoustical Society of America
影响因子：
--
作者：
Macherey O;Carlyon RP
通讯作者：
Carlyon RP