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2. Sound - Wikipedia

   en.wikipedia.org/wiki/Sound

   Acoustics is the interdisciplinary science that deals with the study of mechanical waves in gasses, liquids, and solids including vibration, sound, ultrasound, and infrasound. A scientist who works in the field of acoustics is an acoustician , while someone working in the field of acoustical engineering may be called an acoustical engineer . [ 3 ]

3. Whispering-gallery wave - Wikipedia

   en.wikipedia.org/wiki/Whispering-gallery_wave

   Whispering-gallery waves, or whispering-gallery modes, are a type of wave that can travel around a concave surface.Originally discovered for sound waves in the whispering gallery of St Paul's Cathedral, they can exist for light and for other waves, with important applications in nondestructive testing, lasing, cooling and sensing, as well as in astronomy.

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. Diaphragm (acoustics) - Wikipedia

   en.wikipedia.org/wiki/Diaphragm_(acoustics)

   It is commonly constructed of a thin membrane or sheet of various materials, suspended at its edges. The varying air pressure of sound waves imparts mechanical vibrations to the diaphragm which can then be converted to some other type of signal; examples of this type of diaphragm are found in microphones and the human eardrum. Conversely a ...

6. Acoustic wave - Wikipedia

   en.wikipedia.org/wiki/Acoustic_wave

   An acoustic wave is a mechanical wave that transmits energy through the movements of atoms and molecules. Acoustic waves transmit through fluids in a longitudinal manner (movement of particles are parallel to the direction of propagation of the wave); in contrast to electromagnetic waves that transmit in transverse manner (movement of particles at a right angle to the direction of propagation ...

7. Underwater acoustics - Wikipedia

   en.wikipedia.org/wiki/Underwater_acoustics

   Output of a computer model of underwater acoustic propagation in a simplified ocean environment. A seafloor map produced by multibeam sonar. Underwater acoustics (also known as hydroacoustics) is the study of the propagation of sound in water and the interaction of the mechanical waves that constitute sound with the water, its contents and its boundaries.

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   mail.aol.com

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9. Absorption (acoustics) - Wikipedia

   en.wikipedia.org/wiki/Absorption_(acoustics)

   The behaviour of sound waves encountering a different medium is dictated by the differing acoustic impedances. As with electrical impedances, there are matches and mismatches and energy will be transferred for certain frequencies (up to nearly 100%) whereas for others it could be mostly reflected (again, up to very large percentages).