在有听力损失和没有听力损失的听众中,对调制灵敏度的单声和双声测量进行相关测量
Virginia Best1, Christopher Conroy1,2
1Department of Speech, Language and Hearing Sciences, Boston University, Boston, Massachusetts 02215, USA.
The Journal of the Acoustical Society of America
|September 5, 2024
概括
听力损失的个体对声音信封线索 (ITDENV) 和振幅调制 (AM) 显示出更好的灵敏度. ITDENV的敏感性与AM的敏感性有关,这表明共享的处理机制.
科学领域:
- 听觉感知是一种听觉感知.
- 精神声学是一种精神声学.
- 听力科学是一种科学.
背景情况:
- 听众使用高频声音 (ITDENV) 中的间隔时间差异来定位声音.
- 作为线索的ITDENV的有效性取决于声音外内的振幅调制 (AM) 特性.
- 有时,有感觉神经听力损失 (SNHL) 的人对AM有高度敏感.
研究的目的:
- 调查SNHL患者是否具有更高的ITDENV敏感性,特别是在AM存在的条件下.
- 为了确定ITDENV灵敏度的个体差异是否与AM灵敏度的差异相关.
主要方法:
- 采用了标准的自适应AM检测任务和针对ITDENV灵敏度的修改版.
- 刺激包括在32,64或128Hz调节的4kHz音调,在30dB的感觉水平.
- 对16名听力正常的听众和16名SNHL听众进行了任务.
主要成果:
- 在AM和ITDENV检测值之间发现了显著的相关性.
- 与听力正常的听众相比,SNHL的听众在AM和ITDENV检测方面通常表现出更好的 (较低的) 值.
- 一项对照实验表明,刺激水平是组比较中需要考虑的因素.
结论:
- 这些发现支持这样一个假设:SNHL患者可能有增强的ITDENV敏感性,与他们的AM敏感性有关.
- 这些结果表明AM和ITDENV线索的神经处理重叠.
- 进一步的研究应该考虑绝对感觉水平在解释听觉暗示灵敏度的群体差异中的作用.
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
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
Hearing
52.0K
When we hear a sound, our nervous system is detecting sound waves—pressure waves of mechanical energy traveling through a medium. The frequency of the wave is perceived as pitch, while the amplitude is perceived as loudness.
52.0K
Sensation
537
Sensory receptors are specialized neurons that respond to specific types of external stimuli, initiating the process known as sensation. This occurs when sensory input, such as light entering the eye, is detected by these receptors, causing chemical changes in the cells of the retina. These cells then convert the sensory stimulus into action potentials that are transmitted to the central nervous system, a process termed transduction.
Absolute thresholds can quantify the sensitivity of sensory...
Absolute thresholds can quantify the sensitivity of sensory...
537
Perceiving Loudness, Pitch, and Location
203
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...
203
The Cochlea
44.7K
The cochlea is a coiled structure in the inner ear that contains hair cells—the sensory receptors of the auditory system. Sound waves are transmitted to the cochlea by small bones attached to the eardrum called the ossicles, which vibrate the oval window that leads to the inner ear. This causes fluid in the chambers of the cochlea to move, vibrating the basilar membrane.
44.7K


