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相关概念视频

Echo01:06

Echo

732
The human ear cannot distinguish between two sources of sound if they happen to reach within a specific time interval, typically 0.1 seconds apart. More than this, and they are perceived as separate sources.
Imagine the sound is reflected back to the ears. Assuming that the source is very close to the human, the difference between hearing the two sounds—the emitted sound and the reflected sound—may be more than the minimum time for perceiving distinct sounds. If this is the case,...
732
Sound as Pressure Waves01:17

Sound as Pressure Waves

2.9K
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...
2.9K
Sound Waves01:01

Sound Waves

10.5K
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....
10.5K
Environmental Applications of Microorganisms01:30

Environmental Applications of Microorganisms

664
Microorganisms play a pivotal role in maintaining ecosystem balance by recycling essential elements such as carbon, nitrogen, and phosphorus, as well as supporting processes like bioremediation, wastewater treatment, and biofuel production.Microbes in Elemental CyclesIn the carbon cycle, microorganisms decompose organic matter, releasing carbon dioxide via aerobic respiration. This carbon dioxide is subsequently used by photosynthetic organisms to synthesize organic compounds, closing the...
664
Perception of Sound Waves01:01

Perception of Sound Waves

5.2K
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...
5.2K
Sound Waves: Resonance01:14

Sound Waves: Resonance

2.9K
Resonance is produced depending on the boundary conditions imposed on a wave. Resonance can be produced in a string under tension with symmetrical boundary conditions (i.e., has a node at each end). A node is defined as a fixed point where the string does not move. The symmetrical boundary conditions result in some frequencies resonating and producing standing waves, while other frequencies interfere destructively. Sound waves can resonate in a hollow tube, and the frequencies of the sound...
2.9K

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相关实验视频

Updated: Nov 27, 2025

Assessment of Audio-Tactile Sensory Substitution Training in Participants with Profound Deafness Using the Event-Related Potential Technique
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ecoSound-web:一个开源的生态声学在线平台.

Kevin F A Darras1,2,3,4, Noemí Pérez3, Liu Dilong5

  • 1Computational Landscape Ecology, TU Dresden, Dresden, Sachsen, 01737, Germany.

F1000Research
|November 11, 2024
PubMed
概括

EcoSound-web是一个新的开源平台,解决了生物多样性研究的声学数据管理和分析方面的挑战. 这种免费,可访问的工具有助于存储,处理和分析音景录音,支持生态研究.

关键词:
声音景观 声音景观音频注释 音频注释自动音响录音自动化录音系统自主记录单元的自主记录单元生态声学 生态声学通过被动的声学监测.声音分析 声音分析频谱图是指光谱图中的光谱.

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科学领域:

  • 生态声学和生物多样性监测.
  • 生物声学和音景生态学.
  • 为生态研究开发开源软件.

背景情况:

  • 被动声学监控产生了大量的音频数据集,这给数据管理和分析带来了重大挑战.
  • 现有的软件解决方案往往无法满足管理,处理,导航和分析声数据的综合需求.
  • 生态声学领域需要可访问,不断发展和自由软件工具.

研究的目的:

  • 推出ecoSound-web,一个开源的在线平台,旨在克服生态声学数据分析中的技术障碍.
  • 为存储,组织,处理,分析和共享音景录音和相关元数据提供统一的解决方案.
  • 通过可访问和先进的声学数据管理和分析能力,促进生态研究.

主要方法:

  • 生态学家和软件工程师开发了一个开源的,基于Web的平台 (ecoSound-web).
  • 实现手动和自动 (深度学习) 标注声乐动物和音景组件的功能.
  • 集成用于时间/频率领域的音频分析工具,声学指数计算和参考声音库管理.
  • 包括对注释的同行评审功能.

主要成果:

  • ecoSound-web提供了一套全面的工具,用于管理和分析声学数据,包括存储,重新采样和组织.
  • 该平台支持使用深度学习模型对鸟类和英国蝙蝠物种进行手动注释和自动注释.
  • 用户可以计算alpha声学指数,分析音频频谱,并利用各种类型的参考声音库.
  • 已证明的使用案例包括采样鸟/蝙蝠群落,分析灵长类动物的呼叫和评估音景组件.

结论:

  • ecoSound-web提供了一个免费,可访问和不断发展的平台,以解决生态声学数据管理和分析方面的关键需求.
  • 该平台使研究人员能够有效地处理和分析大型声学数据集,推进生物多样性监测和音景生态学.
  • 它的开源性质促进了生态声学社区的合作和持续改进.