破波によって引き寄せられる離散的な泡の音幅
Contact us if these videos are not relevant.
Contact us if these videos are not relevant.
PubMedで要約を見る
まとめ
この要約は機械生成です。波の破裂はバブルから音を発生し,より大きなバブルはより大きな音の放出を生成します. この発見は,海洋と大気間のガス交換とバブルサイズの分布を理解するのに役立ちます.
科学分野
- 海洋学
- 音響学
- 環境科学
背景
- 海洋と大気間のガスの交換は,地球規模の気候規制において極めて重要であり,炭素の吸収と大気中のガスのバランスに影響を与えます.
- バブルダイナミクスを理解することは このガス交換プロセスを定量化するための鍵です
研究 の 目的
- 波の破裂によるバブルによる音響放射を調査する.
- 泡の直径と音の強さの関係を分析し,泡の大きさの分布の見積りを改善する.
主な方法
- 制御された実験室での実験で 線形焦点の破壊波を用いた.
- バブル形成と音響の記録を 高速で同期した
主要な成果
- 泡の大きさと音波の強度との間には多項関係があることが判明した.
- より大きなバブルは より大きな音を出すことが分かりました
結論
- この研究は波の破裂による 泡の音響特性を定量化しています
- この発見は水中バブルによる音の発生と ガス交換におけるその役割を より広く理解することを支援しています
関連する概念動画
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 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...
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...
As with waves on a string, the speed of sound or a mechanical wave in a fluid depends on the fluid's elastic modulus and inertia. The two relevant physical quantities are the bulk modulus and the density of the material. Indeed, it turns out that the relationship between speed and the bulk modulus and density in fluids is the same as that between the speed and the Young's modulus and density in solids.
The speed of sound in fluids can be derived by considering a mechanical wave...
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...
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....