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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. Acoustics - Wikipedia

    en.wikipedia.org/wiki/Acoustics

    Acoustics is a branch of physics that deals with the study of mechanical waves in gases, liquids, and solids including topics such as vibration, sound, ultrasound and infrasound. A scientist who works in the field of acoustics is an acoustician while someone working in the field of acoustics technology may be called an acoustical engineer.

  4. Soundwave (Transformers) - Wikipedia

    en.wikipedia.org/wiki/Soundwave_(Transformers)

    Soundwave is a fictional robot character appearing in various Transformers continuity lines within the Transformers franchise. His most well-known disguise is that of a micro cassette recorder. Throughout most of his incarnations, he is an underlying loyal lieutenant of the Decepticon leader Megatron.

  5. Alpha wave - Wikipedia

    en.wikipedia.org/wiki/Alpha_wave

    Alpha wave. Alpha waves, or the alpha rhythm, are neural oscillations in the frequency range of 8–12 Hz [ 1] likely originating from the synchronous and coherent ( in phase or constructive) electrical activity of thalamic pacemaker cells in humans. Historically, they are also called "Berger's waves" after Hans Berger, who first described them ...

  6. Physics of whistles - Wikipedia

    en.wikipedia.org/wiki/Physics_of_whistles

    A whistle is a device that makes sound from air blown from one end forced through a small opening at the opposite end. They are shaped in a way that allows air to oscillate inside of a chamber in an unstable way. The physical theory of the sound-making process is an example of the application of fluid dynamics or hydrodynamics and aerodynamics ...

  7. Absorption (acoustics) - Wikipedia

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

    An example of a material in which absorption can observed: sound absorbing foam, also known as acoustic foam. In acoustics, absorption refers to the process by which a material, structure, or object takes in sound energy when sound waves are encountered, as opposed to reflecting the energy. Part of the absorbed energy is transformed into heat ...

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