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相关概念视频

Language Development01:22

Language Development

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Children master language quickly and with relative ease, supported by both biological predisposition and reinforcement. B. F. Skinner (1957) proposed that language is learned through reinforcement, while Noam Chomsky (1965) argued that language acquisition mechanisms are biologically determined.
The critical period for language acquisition suggests that the ability to acquire language is at its peak early in life. As people age, this proficiency decreases. Language development begins very...
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Frequency-dependent Selection01:21

Frequency-dependent Selection

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When the fitness of a trait is influenced by how common it is (i.e., its frequency) relative to different traits within a population, this is referred to as frequency-dependent selection. Frequency-dependent selection may occur between species or within a single species. This type of selection can either be positive—with more common phenotypes having higher fitness—or negative, with rarer phenotypes conferring increased fitness.
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Perception of Sound Waves01:01

Perception of Sound Waves

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The human ear is not equally sensitive to all frequencies in the audible range. It may perceive sound waves with the same pressure but different frequencies as having different loudness. Moreover, the perception of sound waves depends on the health of an individual's ears, which decays with age. The health of one's ears may also be affected by regular exposure to loud noises.
The pitch of a sound depends on the frequency and the pressure amplitude of the source. Two sounds of the same...
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Suppose one wants to test independence between the two variables of a contingency table. The values in the table constitute the observed frequencies of the dataset. But how does one determine the expected frequency of the dataset? One of the important assumptions is that the two variables are independent, which means the variables do not influence each other. For independent variables, the statistical probability of any event involving both variables is calculated by multiplying the individual...
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Proportional-Derivative (PD) controllers are widely used in fan control systems to improve stability and performance. A fan control system can be effectively represented using a Bode plot to illustrate the impact of a PD controller through its transfer function. The Bode plot visually conveys how PD control modifies the fan's response across various frequencies, providing a frequency domain interpretation of the controller's behavior.
The proportional control gain, combined with the...
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Scaling01:26

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In designing and analyzing filters, resonant circuits, or circuit analysis at large, working with standard element values like 1 ohm, 1 henry, or 1 farad can be convenient before scaling these values to more realistic figures. This approach is widely utilized by not employing realistic element values in numerous examples and problems; it simplifies mastering circuit analysis through convenient component values. The complexity of calculations is thereby reduced, with the understanding that...
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相关实验视频

Updated: Jan 12, 2026

Behavioral Assessment of Hearing in 2 to 4 Year-old Children: A Two-interval, Observer-based Procedure Using Conditioned Play-based Responses
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发育变化 在儿童的语音频率权重.

A K Bosen1, A Frenette2, M Spratford1

  • 1Boys Town National Research Hospital, Omaha, Nebraska, USA.

Ear and hearing
|November 7, 2025
PubMed
概括
此摘要是机器生成的。

儿童的语音可理解性随着年龄的增长而变化,年长的儿童更多地依赖更高频段. 对于准确的语音识别模型,需要考虑频率重要性权重中的这些发育变化.

关键词:
乐队的重要性 乐队重要性儿童发展 儿童发展语音识别 语音识别 语音识别

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Last Updated: Jan 12, 2026

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科学领域:

  • 听力学 听力学是指听力学.
  • 发展心理学 发展心理学
  • 语音语言病理学 语言病理学

背景情况:

  • 语音可理解性估计依赖于光谱带可听性和重要性权重.
  • 儿童的临床语音可理解度量需要根据年龄进行特定的调整,因为语音识别的发育变化.
  • 以前的研究表明,儿童使用光谱线索的发育转变,但频段重要性中的个体差异需要验证.

研究的目的:

  • 调查频段重要性权重的年龄相关差异,用于儿童的语音识别.
  • 探索这些乐队重要性权重与词汇和认知能力的发育变化之间的关系.

主要方法:

  • 42名听力正常的儿童 (6-13岁) 进行过的词识别任务.
  • 听觉刺激被过成六个频段 (250-8000赫兹),识别准确性根据频段的存在/缺席而回归.
  • 孩子们还完成了标准化的词汇和认知评估.

主要成果:

  • 频率重要性权重显示了与年龄相关的变化,特别是对于以2000和4000赫兹为中心的频段,年龄较大的儿童分配更高的权重.
  • 特定的频段 (500,1000,2000 Hz) 对于识别单词比识别非单词更重要.
  • 在控制年龄后,词汇和认知任务没有预测乐队重要性权重,尽管侧边任务的性能预测了整体识别准确性.

结论:

  • 频段重要性权重在儿童的发育过程中演变.
  • 目前预测儿童语音识别的模型如果不考虑这些发育变化,可能会高估准确性.
  • 需要进一步的研究来检查听力损失对这些发育轨迹的影响.