通过有牙的鱼头部解剖学传播弹性波的伪光谱模型,以及对生物声波的含义
Fawad Ali1, Carlos García A1, Aida Hejazi Nooghabi2
1Dipartimento di Geoscienze, Università degli Studi di Padova, 35131 Padova, Italy.
The Journal of the Acoustical Society of America
|December 2, 2025
概括
有牙的鱼使用它们独特的头部解剖学精确地定位声音. 它们的内耳分析反射到内部结构的信号"codas",以确定声音的高度.
科学领域:
- 生物声学是一种生物声学.
- 计算生物学 计算生物学
- 海洋哺乳动物科学科学
背景情况:
- 有牙的鱼拥有先进的声音定位和生物声波能力.
- 有牙的鱼没有外部耳朵结构 (pinnae),这在理解它们的声音定位机制方面是一个挑战.
- 之前的研究还没有确定特定的解剖特征可以功能性地取代音响定位的皮纳.
研究的目的:
- 调查牙鱼声源海拔高度测定背后的机制.
- 通过使用伪光谱时间域 (PSTD) 数值方案,通过瓶鼻海豚头部解剖学建模弹性波传播.
- 确定解剖结构如何为牙的精度做出贡献.
主要方法:
- 利用计算机断层扫描 (CT) 扫描来创建一个细致的3D速度密度模型的瓶鼻海豚头.
- 采用伪光谱时间域 (PSTD) 数值方案来模拟三维弹性波传播.
- 模拟了在内耳位置的各种高度记录45kHz的侧边突发.
主要成果:
- 验证了PSTD波传播溶解器的复杂解剖波相互作用.
- 证明,通过分析信号代码,可以确定声音源的高度.
- 确定coda的波形,由反射和折射形成,是高度感知的关键.
结论:
- 牙的鱼头的复杂解剖学在声音源的高度确定中起着至关重要的作用.
- 受内部解剖结构影响的信号分析,使得有牙的鱼能够准确地垂直地定位声音.
- 这项研究提供了关于牙鱼头形态学对声学传感的功能意义的见解.
相关概念视频
01:01Sound Waves
12.3K
Sound waves can be thought of as fluctuations in the pressure of a medium through which they propagate. Since the pressure also makes the medium's particles vibrate along its direction of motion, the waves can be modeled as the displacement of the medium's particles from their mean position.
Sound waves are longitudinal in most fluids because fluids cannot sustain any lateral pressure. In solids, however, shear forces help in propagating the disturbance in the lateral direction as well....
Sound waves are longitudinal in most fluids because fluids cannot sustain any lateral pressure. In solids, however, shear forces help in propagating the disturbance in the lateral direction as well....
12.3K
01:13The Cochlea
50.4K
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.
50.4K
01:16Shock Waves
2.5K
While deriving the Doppler formula for the observed frequency of a sound wave, it is assumed that the speed of sound in the medium is greater than the source's speed through it. When this condition is breached, a shock wave occurs.
When the source's speed approaches the speed of sound, constructive interference between successive wavefronts emitted by the source occurs immediately behind it. Initially, scientists believed that this constructive interference would result in such high...
When the source's speed approaches the speed of sound, constructive interference between successive wavefronts emitted by the source occurs immediately behind it. Initially, scientists believed that this constructive interference would result in such high...
2.5K
01:10Wave Parameters
8.9K
The simplest mechanical waves are associated with simple harmonic motion and repeat themselves for several cycles. These simple harmonic waves can be modeled using a combination of sine and cosine functions. Consider a simplified surface water wave that moves across the water's surface. Unlike complex ocean waves, in surface water waves, water moves vertically, oscillating up and down, whereas the disturbance of the wave moves horizontally through the medium. If a seagull is floating on the...
8.9K
01:17Sound as Pressure Waves
4.4K
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...
4.4K
01:28Standing Waves in a Cavity
1.4K
A household microwave and lasers are examples of standing electromagnetic waves in a cavity. When two conducting metal plates are placed parallel at the nodal planes, it creates a cavity where standing waves are formed. The cavity between the two planes is analogous to a stretched string held at the points x = 0 and x = L. Here, the distance 'L' between the two planes must be an integer multiple of half of the wavelength. The wavelengths that satisfy this condition are given by:
1.4K