频谱降解对语音可理解性和皮质表现的影响
Hyo Jung Choi1,2, Jeong-Sug Kyong3,4, Jong Ho Won5
1Department of Otorhinolaryngology-Head and Neck Surgery, Nowon Eulji Medical Center, Eulji University School of Medicine, Seoul, Republic of Korea.
Frontiers in neuroscience
|April 22, 2024
概括
频谱通道带显著影响语音可理解性和高阶皮质处理,如N2和P3b事件相关的潜在组件所示. 减少道损害了语音理解期间的语义整合.
科学领域:
- 神经科学是一个神经科学.
- 听觉神经科学 听觉神经科学
- 语音处理 语音处理
背景情况:
- 噪声编码语音对于研究声学暗示对语音理解的影响至关重要.
- 减少的光谱通道频段显然会降低语音可理解性.
- 之前关于频道频段 (P1,N1,P2) 的ERP研究缺乏共识.
研究的目的:
- 为了研究光谱降解如何影响超出感知范围的更高阶语音处理.
- 客观地测量神经信号差异在区分或解释语音含义.
- 检查光谱通道波段对N2和P3b组件的影响.
主要方法:
- 利用一种奇怪的范式,使用语音刺激和不同的通道频段 (4,8,16,32).
- 通过单词重复测量了20名正常听觉的年轻成年人的行为语音可理解性.
- 记录的事件相关潜力 (ERP),特别是N2和P3b组件.
主要成果:
- 行为词重复的准确性随着频道频段的减少而显著下降 (p < 0.001).
- N2组件显示了通道带对峰值振幅 (p < 0.001) 和延迟 (p < 0.001) 的显著影响.
- 此外,P3b组件对峰值振幅 (p < 0.001) 和延迟 (p = 0.039) 也表现出显著的频道带效应.
结论:
- 光谱通道带显著影响皮质语言处理,这在N2和P3b反应中很明显.
- 研究结果支持这一假设,即光谱降解会影响语音理解中的更高阶认知过程.
- 光谱退化语音主要影响语义整合期间的皮质反应.
相关概念视频
Aliasing
133
Accurate signal sampling and reconstruction are crucial in various signal-processing applications. A time-domain signal's spectrum can be revealed using its Fourier transform. When this signal is sampled at a specific frequency, it results in multiple scaled replicas of the original spectrum in the frequency domain. The spacing of these replicas is determined by the sampling frequency.
If the sampling frequency is below the Nyquist rate, these replicas overlap, preventing the original...
If the sampling frequency is below the Nyquist rate, these replicas overlap, preventing the original...
133
Downsampling
154
When considering a sampled sequence with zero values between sampling instants, one can replace it by taking every N-th value of the sequence. At these integer multiples of N, the original and sampled sequences coincide. This process, known as decimation, involves extracting every N-th sample from a sequence, thereby creating a more efficient sequence.
The Fourier transform of the decimated sequence reveals a combination of scaled and shifted versions of the original spectrum. This...
The Fourier transform of the decimated sequence reveals a combination of scaled and shifted versions of the original spectrum. This...
154
¹³C NMR: Distortionless Enhancement by Polarization Transfer (DEPT)
1.0K
When proton-coupled carbon-13 spectra are simplified by a broadband proton decoupling technique, structural information about the coupled protons is lost. Distortionless enhancement by polarization transfer (DEPT) is a technique that provides information on the number of hydrogens attached to each carbon in a molecule. While the DEPT experiment utilizes complex pulse sequences, the pulse delay and flip angle are specifically manipulated. The resulting signals have different phases depending on...
1.0K
Reconstruction of Signal using Interpolation
194
Signal processing techniques are essential for accurately converting continuous signals to digital formats and vice versa. When a continuous signal is sampled with a period T, the resulting sampled signal exhibits replicas of the original spectrum in the frequency domain, spaced at intervals equal to the sampling frequency. To handle this sampled signal, a zero-order hold method can be applied, which creates a piecewise constant signal by retaining each sample's value until the next...
194
Interference: Path Lengths
1.3K
Consider two sources of sound, that may or may not be in phase, emitting waves at a single frequency, and consider the frequencies to be the same.
Two special sources may be considered when they are in phase. This can be easily achieved by feeding the two sources from the same source. An example would be synchronizing the two speakers by feeding them with the same source, such as the sound waves produced by a tuning fork. This setup ensures that the two sources have the same frequency and are...
Two special sources may be considered when they are in phase. This can be easily achieved by feeding the two sources from the same source. An example would be synchronizing the two speakers by feeding them with the same source, such as the sound waves produced by a tuning fork. This setup ensures that the two sources have the same frequency and are...
1.3K
Perception of Sound Waves
4.4K
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...
The pitch of a sound depends on the frequency and the pressure amplitude of the source. Two sounds of the same...
4.4K


