関連する実験動画

Updated: Jul 11, 2026

The Measurement of Unsteady Surface Pressure Using a Remote Microphone Probe
08:53

The Measurement of Unsteady Surface Pressure Using a Remote Microphone Probe

Published on: December 3, 2016

コンコルドは,大気探査機として音響ブームを発する

N K Balachandran, W L Donn, D H Rind

    Science (New York, N.Y.)
    |July 1, 1977
    PubMed
    まとめ

    コンコルドの超音速輸送機からの音響ブームは,大気の状態を明らかにします. 超音波信号は,平流層と熱層から気温と風のデータを提供します.

    さらに関連する動画

    Thermocapillary Convection Space Experiment on the SJ-10 Recoverable Satellite07:00

    Thermocapillary Convection Space Experiment on the SJ-10 Recoverable Satellite

    Published on: March 11, 2020

    Laboratory Scale Slow Cook-Off Testing of Rocket Propellants: The Combustion Rate Analysis of a Slowly Heated Propellant (CRASH-P) Test06:52

    Laboratory Scale Slow Cook-Off Testing of Rocket Propellants: The Combustion Rate Analysis of a Slowly Heated Propellant (CRASH-P) Test

    Published on: February 6, 2021

    関連する概念動画

    Shock Waves01:16

    Shock Waves

    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 pressures...
    Sound as Pressure Waves01:17

    Sound as Pressure Waves

    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...
    Sound Waves: Resonance01:14

    Sound Waves: Resonance

    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...
    Sound Waves: Interference00:53

    Sound Waves: Interference

    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...
    Intensity and Pressure of Sound Waves01:05

    Intensity and Pressure of Sound Waves

    The intensity of sound waves can be related to displacement and pressure amplitudes by using their wave expressions and the definition of intensity. The critical step to achieve this is to write the power delivered by the particles on the wave as the product of force and velocity and simplify the force per unit area as the pressure. The velocity of the medium's particles can be derived from the displacement.
    Unlike the time average of a sinusoidal term, which is zero since it is positive and...
    Perception of Sound Waves01:01

    Perception of Sound Waves

    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 frequency...