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  2. Kundt's tube - Wikipedia

    en.wikipedia.org/wiki/Kundt's_tube

    The sound generator is turned on and the piston is adjusted until the sound from the tube suddenly gets much louder. This indicates that the tube is at resonance. This means the length of the round-trip path of the sound waves, from one end of the tube to the other and back again, is a multiple of the wavelength λ of the sound waves. Therefore ...

  3. Echo sounding - Wikipedia

    en.wikipedia.org/wiki/Echo_sounding

    The speed of sound will vary slightly depending on temperature, pressure and salinity; and for precise applications of echosounding, such as hydrography, the speed of sound must also be measured, typically by deploying a sound velocity probe in the water. Echo sounding is a special purpose application of sonar used to locate the bottom.

  4. Rubens tube - Wikipedia

    en.wikipedia.org/wiki/Rubens_tube

    A Rubens tube, also known as a standing wave flame tube, or simply flame tube, is a physics apparatus for demonstrating acoustic standing waves in a tube. Invented by German physicist Heinrich Rubens in 1905, it graphically shows the relationship between sound waves and sound pressure, as a primitive oscilloscope. Today, it is used only ...

  5. Sonochemistry - Wikipedia

    en.wikipedia.org/wiki/Sonochemistry

    The experiment was about the frequency of the energy that it took for sonic waves to "penetrate" the barrier of water. He came to the conclusion that sound does travel faster in water, but because of the water's density compared to Earth's atmosphere it was incredibly hard to get the sonic waves to couple their energy into the water. Due to the ...

  6. Acoustic theory - Wikipedia

    en.wikipedia.org/wiki/Acoustic_theory

    Acoustic theory is a scientific field that relates to the description of sound waves.It derives from fluid dynamics.See acoustics for the engineering approach.. For sound waves of any magnitude of a disturbance in velocity, pressure, and density we have

  7. Vocal cords - Wikipedia

    en.wikipedia.org/wiki/Vocal_cords

    In essence, sound is generated in the larynx by chopping up a steady flow of air into little puffs of sound waves. [29] The perceived pitch of a person's voice is determined by a number of different factors, most importantly the fundamental frequency of the sound generated by the larynx. The fundamental frequency is influenced by the length ...

  8. Trump won't kill green energy - AOL

    www.aol.com/finance/trump-wont-kill-green-energy...

    Incoming president Donald Trump may seem like a climate change abettor. He thinks global warming is a hoax and wants to undo many of President Biden’s green energy projects.Trump has nominated ...

  9. Rijke tube - Wikipedia

    en.wikipedia.org/wiki/Rijke_tube

    The Rijke tube operates with both ends open. However, a tube with one end closed will also generate sound from heat, if the closed end is very hot. Such a device is called a "Sondhauss tube". The phenomenon was first observed by glassblowers and was first described in 1850 by the German physicist Karl Friedrich Julius Sondhauss (1815–1886).

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