在空间语音噪音任务中模拟单侧和双侧耳植入物
Mengchao Zhang1, Christine du Plessis1
1Audiology Department, College of Health and Life Sciences, Aston University, Birmingham, B4 7ET, United Kingdom.
The Journal of the Acoustical Society of America
|September 2, 2025
概括
这项研究模拟了双侧耳植入物 (CI),并发现对噪音有好处,但只有当掩盖时是有活力或调节的,而不是信息的. 结果与真正的CI使用者不同,强调需要进一步研究.
科学领域:
- 听觉神经科学
- 语音处理
- 听力技术
背景情况:
- 耳植入器 (CI) 的目的是恢复听力,但通常会导致噪音环境中的语音理解减少.
- 双耳听觉在噪音中对语音感知提供了显著的优势,但在CI用户中,这些优势往往会减少.
- 对于提高助听器性能至关重要的是要了解限制助听器使用者的双耳益处.
研究的目的:
- 使用SPIRAL语音编码器模拟正常听力听众的双边和单边耳植入器 (CI) 处理.
- 研究不同类型 (能量,调节,信息) 和位置对空间语音识别的影响.
- 在模拟CI条件下评估双耳效益的存在和程度 (总和,抑制).
主要方法:
- 13名正常听力的人参与了这项研究.
- 一个带有密集音色载体的通道声编码器 (SPIRAL) 模拟了CI处理.
- 用不同类型和位置测试了空间语音噪音识别 (0°,+90°,-90°).
主要成果:
- 模拟双边CI使用者在能量和调节面罩器中表现出双耳益处.
- 在基于语言的信息掩盖的情况下没有观察到双耳益处.
- 模拟的双耳益处与实际CI使用者的研究结果不一致.
结论:
- 螺旋声编码器是模拟CI处理和调查双耳听力的一个有价值的工具.
- 模拟CI使用者的双耳益处取决于面具的能量和信息组成部分.
- 需要使用这种模拟方法进行进一步的研究,以确定双边CI中影响双耳效益的具体因素.
相关概念视频
01:31Hearing
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.
01:01Perception of Sound Waves
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 frequency...
The pitch of a sound depends on the frequency and the pressure amplitude of the source. Two sounds of the same frequency...
01:11The Auditory Ossicles
The auditory ossicles of the middle ear transmit sounds from the air as vibrations to the fluid-filled cochlea. The auditory ossicles consist of two malleus (hammer) bones, two incus (anvil) bones, and two stapes (stirrups), one on each side. These bones develop during the fetal stage and are the ones to ossify first. They are fully mature at birth and do not grow afterward.
The aptly named stapes look very much like a stirrup. The three ossicles are unique to mammals, and each plays a role in...
The aptly named stapes look very much like a stirrup. The three ossicles are unique to mammals, and each plays a role in...
01:17Sound as Pressure Waves
Sound waves, which are longitudinal waves, can be modeled as the displacement amplitude varying as a function of the spatial and temporal coordinates. As a column of the medium is displaced, its successive columns are also displaced. As the successive displacements differ relatively, a pressure difference with the surrounding pressure is created. The gauge pressure varies across the medium.
The pressure fluctuation depends on the difference in displacements between the successive points in the...
The pressure fluctuation depends on the difference in displacements between the successive points in the...
01:17Auditory Perception
The auditory system is essential for sound perception, utilizing various critical structures. When sound waves enter the outer ear, they travel through the ear canal and cause the eardrum to vibrate. These vibrations are then transmitted to the middle ear, where three tiny bones – the malleus, incus, and stapes – amplify the sound. This amplification is crucial, as it ensures that the sound vibrations are strong enough to be conveyed to the inner ear. These vibrations then reach the cochlea, a...
01:21Perceiving Loudness, Pitch, and Location
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 identifying...
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 identifying...