用于规定非线性频率压缩的刺激水平对语音感知的影响
Marc A Brennan1, Daniel M Rasetshwane2, Judy G Kopun2
1Special Education and Communication Disorders, University of Nebraska-Lincoln, Lincoln, Nebraska.
Journal of the American Academy of Audiology
|January 30, 2024
概括
使用更高的输入级 (70 dB SPL) 设置非线性频率压缩 (NFC),与较低的输入级相比,对有听力损失的人来说,显著改善了无意义音节识别.
科学领域:
- 听力学 听力学是指听力学.
- 信号处理 信号处理
- 助听器技术 助听器技术
背景情况:
- 非线性频率压缩 (NFC) 是一种信号处理技术,它将听不到的高频声音转移到可听到的低频率.
- 设置NFC的最佳输入级别至关重要,因为个体听力损失会影响可听的频率范围.
- 对NFC校准的不同输入级别可能会影响听力受损的听众的语音识别性能.
研究的目的:
- 调查用于设置NFC的不同输入语音级别对无意义音节识别的影响.
- 确定NFC校准的最佳输入级别,以最大限度地提高语音可理解性.
主要方法:
- 在23名有听力损失的成年人中,使用助听器模拟器评估了无意义音节识别.
- NFC设置为三个输入级别:50,60和70dB SPL,限制带宽条件作为控制.
- 语音刺激 (辅音-母音-辅音非单词) 呈现在噪音中,并且在不同的语音组件中获得识别得分.
主要成果:
- 随着呈现水平的提高,无意义音节识别得到了改进.
- 当使用70 dB SPL输入级别设置NFC时,获得了最高的识别分数.
- 当NFC设置为50或60 dB SPL时,识别显著下降,母音比辅音更受影响.
结论:
- 根据更高的输入级 (70 dB SPL) 设置NFC,可以获得更好的无意义音节识别.
- 对于确定NFC参数来优化听力障碍者的语音识别,建议使用高呈现级别.
- 这些发现表明,输入级别的选择是NFC适合有效使用助听器的关键因素.
相关概念视频
Sound Intensity Level
4.2K
Humans perceive sound by hearing. The human ear helps sound waves reach the brain, which then interprets the waves and creates the perception of hearing. The loudness of the environment in which a person is located determines whether they can distinguish between different sound sources.
The human ear can perceive an extensive range of sound intensity, necessitating the use of the logarithmic scale to define a physical quantity—the intensity level. It is a ratio of two intensities and...
The human ear can perceive an extensive range of sound intensity, necessitating the use of the logarithmic scale to define a physical quantity—the intensity level. It is a ratio of two intensities and...
4.2K
Perceiving Loudness, Pitch, and Location
212
The human brain perceives pitch through two primary mechanisms reflected in place theory and frequency theory. Each mechanism describes how sound waves are interpreted as specific pitches by the brain, offering insights into the intricate processes of auditory perception.
Place theory, or place coding, suggests that different pitches are heard because various sound waves activate specific locations along the cochlea's basilar membrane. The brain determines the pitch of a sound by...
Place theory, or place coding, suggests that different pitches are heard because various sound waves activate specific locations along the cochlea's basilar membrane. The brain determines the pitch of a sound by...
212
Perception of Sound Waves
4.5K
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...
4.5K
Subliminal Perception
262
Subliminal perception refers to the processing of sensory information that occurs below the level of conscious awareness. Researchers study subliminal perception by presenting a stimulus, such as a word or image, very quickly, typically around 50 milliseconds. This rapid presentation is often followed by another stimulus, such as a pattern of dots or lines, which blocks further mental processing of the initial stimulus. As a result, if participants cannot identify the initial stimulus better...
262
Doppler Effect - II
3.4K
The Doppler effect has several practical, real-world applications. For instance, meteorologists use Doppler radars to interpret weather events based on the Doppler effect. Typically, a transmitter emits radio waves at a specific frequency toward the sky from a weather station. The radio waves bounce off the clouds and precipitation and travel back to the weather station. The radio frequency of the waves reflected back to the station appears to decrease if the clouds or precipitation are moving...
3.4K
Frequency-Domain Interpretation of PD Control
112
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...
The proportional control gain, combined with the...
112


