雨量观测利用使用防水外获取的雨滴声音:探索频率分析声音的最佳长度
Seunghyun Hwang1, Changhyun Jun1, Carlo De Michele2
1Department of Civil and Environmental Engineering, Chung-Ang University, Seoul 06974, Republic of Korea.
Sensors (Basel, Switzerland)
|July 13, 2024
概括
这项研究引入了一种新方法,利用雨滴声音来估计降雨强度. 一种新的声学设备准确地检测降雨的发生和强度,为传统方法提供了具有成本效益的替代方案.
科学领域:
- 环境科学 环境科学
- 声学 声学 在声学上
- 气象学 天气学
背景情况:
- 准确的降雨强度估计对于各种应用,包括水文学和灾害管理至关重要.
- 传统的降雨量测量方法可能昂贵且空间有限.
- 声学分析为降雨监测提供了一个潜在的低成本,高分辨率的替代方案.
研究的目的:
- 开发和验证一种新的方法,用雨滴的声学数据来估计降雨强度.
- 设计和测试一种创新的声学装置,用于在各种环境条件下收集降雨声音数据.
- 使用不同时间段长度 (1s,10s,1min) 进行降雨强度估计的性能比较.
主要方法:
- 在季风和非季风季节使用定制设计的,消除噪音的设备收集声学数据.
- 从雨滴声音的频率域中提取特征 (dB的平均值,dB的频率加权平均值,dB的标准偏差,最高频率).
- 使用机器学习算法对1s,10s和1min段进行降雨发生的分类和降雨强度的定量估计.
主要成果:
- 降雨发生分类的最佳性能是使用10s段 (精度:0.909,F1得分:0.859) 实现的.
- 使用10s分段进行量化降雨强度估计,结果是根平均平方误差为1.675mm/h,R2为0.798.
- 与传统的降雨监测设备相比,该方法的准确性和成本效益非常高.
结论:
- 雨滴声音的声学分析提供了一种可行且具有成本效益的方法来估计降雨强度.
- 开发的声学装置是紧的,轻量级的,适合广泛部署.
- 这项技术可以加强在广泛的地理区域收集详细的降雨数据.
相关概念视频
01:06Echo
504
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,...
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,...
504
01:19Concept of Resonance and its Characteristics
5.0K
If a driven oscillator needs to resonate at a specific frequency, then very light damping is required. An example of light damping includes playing piano strings and many other musical instruments. Conversely, to achieve small-amplitude oscillations as in a car's suspension system, heavy damping is required. Heavy damping reduces the amplitude, but the tradeoff is that the system responds at more frequencies. Speed bumps and gravel roads prove that even a car's suspension system is not...
5.0K
00:53Sound Waves: Interference
3.7K
Sound waves can be modeled either as longitudinal waves, wherein the molecules of the medium oscillate around an equilibrium position, or as pressure waves. When two identical waves from the same source superimpose on each other, the combination of two crests or two troughs results in amplitude reinforcement known as constructive interference. If two identical waves, that are initially in phase, become out of phase because of different path lengths, the combination of crests with troughs...
3.7K
01:10Interference: Path Lengths
1.3K
Consider two sources of sound, that may or may not be in phase, emitting waves at a single frequency, and consider the frequencies to be the same.
Two special sources may be considered when they are in phase. This can be easily achieved by feeding the two sources from the same source. An example would be synchronizing the two speakers by feeding them with the same source, such as the sound waves produced by a tuning fork. This setup ensures that the two sources have the same frequency and are...
Two special sources may be considered when they are in phase. This can be easily achieved by feeding the two sources from the same source. An example would be synchronizing the two speakers by feeding them with the same source, such as the sound waves produced by a tuning fork. This setup ensures that the two sources have the same frequency and are...
1.3K
01:14Sound Waves: Resonance
2.6K
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...
2.6K
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