相关实验视频
Updated: Jul 19, 2025

09:23
A Low Cost Setup for Behavioral Audiometry in Rodents
Published on: October 16, 2012
12.8K
对于纯色调的音声间时间差敏感度的快速下降可以通过外围过来解释.
bioRxiv : the preprint server for biology
|August 14, 2023
概括
审计系统的审计系统
科学领域:
- 听觉神经科学 听觉神经科学
- 精神声学是一种精神声学.
背景情况:
- 间隔时差 (ITD) 对于水平声音定位至关重要.
- ITD的灵敏度仅限于大约在1400 Hz以下的频率,在700 Hz以上的频率下急剧下降.
- 这种ITD敏感性快速下降的生理基础仍然不清楚.
研究的目的:
- 调查假设外围声音编码,而不是中央限制,决定了ITD灵敏度的下降.
- 检查耳刺激模式的低频边缘在限制ITD感知中的作用.
主要方法:
- 在16名正常听力听众中测量了间声时间差 (ITD) 灵敏度.
- 测试频率范围为900 Hz至1500 Hz,感觉级别为10-50 dB.
主要成果:
- 随着频率的增加和声音水平的下降,ITD的灵敏度显著下降.
- 观察到的性能下降的斜率是90dB/octave.
- 这个斜率与耳激发模式的低频斜率保持一致.
结论:
- 高频ITD的敏感性可能依赖于调节为较低频率的非频率神经元激活.
- 一个简化的模型提出,对细结构ITD敏感的神经元可能被限制在700Hz左右.
- 这挑战了传统的双耳处理模型,这些模型假定了广泛的频率调节神经元.
相关概念视频
The Cochlea
45.2K
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.
45.2K
Design Example
348
The innovation of touch-tone telephony revolutionized the telecommunications industry by replacing the traditional rotary dial with a dual-tone multi-frequency (DTMF) signaling system. This system uses a matrix-style keypad with buttons arranged in four rows and three columns, creating 12 distinct signals each assigned to a pair of frequencies. Each button press results in a simultaneous generation of two sinusoidal tones – one from a low-frequency group (697 to 941 Hz) and one from a...
348
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
4.5K
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
Sensation
660
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...
660
Auditory Pathway
5.5K
Auditory pathways constitute the complex neural circuits responsible for transmitting and interpreting auditory information from the peripheral auditory system to the brain. Sound waves are initially captured by the outer ear, funneled through the ear canal, and reach the tympanic membrane (eardrum). These vibrations are transmitted via the middle ear's ossicles to the inner ear's cochlea.
When viewed cross-sectionally, the cochlea reveals the scala vestibuli and scala tympani flanking...
When viewed cross-sectionally, the cochlea reveals the scala vestibuli and scala tympani flanking...
5.5K

