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関連する概念動画

Sound as Pressure Waves01:17

Sound 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...
4.4K
Sound Waves: Resonance01:14

Sound Waves: Resonance

3.2K
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...
3.2K
Perception of Sound Waves01:01

Perception of Sound Waves

5.4K
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...
5.4K
Sound Intensity00:58

Sound Intensity

4.7K
The loudness of a sound source is related to how energetically the source is vibrating, consequently making the molecules of the propagation medium vibrate. To measure the loudness of a source, the physical quantity of interest is the intensity. This is defined as the energy emitted per unit of time per unit of area perpendicular to the sound wave's propagation direction. Since the total energy is greater if the source vibrates for a longer duration and over a larger area, dividing the...
4.7K
Sound Intensity Level00:53

Sound Intensity Level

4.7K
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...
4.7K
Sound Waves01:01

Sound Waves

12.4K
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....
12.4K

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Updated: Jan 15, 2026

Author Spotlight: A Stable Phantom Material for Optical and Acoustic Imaging
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Author Spotlight: A Stable Phantom Material for Optical and Acoustic Imaging

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環境応答型ハイパーサウンド材料に向けて

Edson R Cardozo de Oliveira1, Gastón Grosman2, Chushuang Xiang1

  • 1Université Paris-Saclay, Centre National de la Recherche Scientifique (CNRS), Centre de Nanosciences et de Nanotechnologies (C2N), 10 Boulevard Thomas Gobert, 91120 Palaiseau, France.

Nano letters
|January 13, 2026
PubMed
まとめ
この要約は機械生成です。

研究者らは、メソポーラスシリカフィルムを用いた新しいナノ音響共振器を開発しました。このデバイスは湿度に敏感であり、適応型ナノフォノニクスおよびセンシングアプリケーションのための調整可能なハイパーサウンド閉じ込めを可能にします。

キーワード:
コヒーレント音響フォノンメソポーラス材料ナノフォノニクス

さらに関連する動画

Fabricating Degradable Thermoresponsive Hydrogels on Multiple Length Scales via Reactive Extrusion, Microfluidics, Self-assembly, and Electrospinning
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Assessment of Audio-Tactile Sensory Substitution Training in Participants with Profound Deafness Using the Event-Related Potential Technique
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関連する実験動画

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Author Spotlight: A Stable Phantom Material for Optical and Acoustic Imaging
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Fabricating Degradable Thermoresponsive Hydrogels on Multiple Length Scales via Reactive Extrusion, Microfluidics, Self-assembly, and Electrospinning
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Fabricating Degradable Thermoresponsive Hydrogels on Multiple Length Scales via Reactive Extrusion, Microfluidics, Self-assembly, and Electrospinning

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Assessment of Audio-Tactile Sensory Substitution Training in Participants with Profound Deafness Using the Event-Related Potential Technique
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科学分野:

  • 材料科学; ナノテクノロジー; 音響学

背景:

  • ギガヘルツ（GHz）音響フォノンは、データ処理や量子コンピューティングなどの高度な技術に不可欠です。従来のナノフォノニック共振器は、環境適応性に課題があります。

研究 の 目的:

  • 新しい開口キャビティナノ音響共振器を導入すること。調整可能なハイパーサウンド閉じ込めのために、特に湿度に対する環境感度を実証すること。

主な方法:

  • 共振器用のメソポーラスSiO2薄膜（MTF）の作製。共振周波数シフトを分析するための過渡反射率測定の利用。細孔サイズと膜厚が異なるデバイスの体系的な比較。

主要な成果:

  • ナノ音響共振器は、相対湿度変化に応答して顕著な共振周波数シフトを示します。共振は、主に膜厚と材料特性によって決定され、細孔形状には依存しません。細孔サイズは、毛細管作用を介したチューニングダイナミクスに影響を与えます。

結論:

  • 開発されたメソポーラス共振器は、ナノスケールメカニクスと環境要因を統合するための汎用的なプラットフォームを提供します。この設計は、環境応答型ハイパーサウンドデバイスを作成するための簡単な経路を提供します。高度なセンシングおよび適応型ナノフォノニックシステムが含まれる可能性があります。