在耳植入物使用者中描述调制灵敏度和音调分辨率之间的关系.
Andres Camarena1, Raymond L Goldsworthy1
1Auditory Research Center, Caruso Department of Otolaryngology, Keck School of Medicine, University of Southern California, Los Angeles, CA, United States of America.
Hearing research
|May 22, 2024
概括
耳植入物使用者
科学领域:
- 听觉神经科学 听觉神经科学
- 生物医学工程 生物医学工程
- 听力科学 听力科学
背景情况:
- 耳植入物 (CI) 可以恢复听力,但其音调分辨率有限.
- 电刺激的幅度调制 (AM) 是CI用户的一个关键提示.
- 了解AM灵敏度对于改善CI音调感知至关重要.
研究的目的:
- 研究耳植入物 (CI) 用户的振幅调制 (AM) 灵敏度和音调分辨率之间的关系.
- 为了比较使用临床CI处理器的音调感知与直接单电极刺激.
- 探索影响CI用户音调感知极限的因素.
主要方法:
- 实验测量了正常听力成年人和CI用户的调制灵敏度和音调分辨率.
- 刺激包括在各种调制频率和深度的振幅调制的正弦形和窄带噪声.
- CI使用者还通过直接单个电极刺激进行了测试,绕过了临床处理器.
主要成果:
- 在IC使用者和正常听力个体中,AM灵敏度和音调分辨率之间发现了强烈的线性关系.
- 单个电极刺激传递调制灵敏度和音调分辨率比临床CI处理器更好.
- 临床处理器在440赫兹的性能较差,使300赫兹感知极限的起源不清楚.
结论:
- 调制深度和灵敏度对于耳植入体用户的音调分辨率至关重要.
- 直接电刺激可能比目前的临床处理器在音调感知方面具有优势.
- 这些发现可以为耳植入物增强调制处理策略的设计提供信息.
相关概念视频
01:13The Cochlea
44.8K
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.
44.8K
01:21Perceiving Loudness, Pitch, and Location
205
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...
205
01:01Perception 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
01:31Hearing
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
00:53Sound 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