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2. Sound energy - Wikipedia

   en.wikipedia.org/wiki/Sound_energy

   In physics, sound energy is a form of energy that can be heard by living things. Only those waves that have a frequency of 16 Hz to 20 kHz are audible to humans. However, this range is an average and will slightly change from individual to individual.

3. Sonoluminescence - Wikipedia

   en.wikipedia.org/wiki/Sonoluminescence

   Sonoluminescence is the emission of light from imploding bubbles in a liquid when excited by sound. Sonoluminescence was first discovered in 1934 at the University of Cologne . It occurs when a sound wave of sufficient intensity induces a gaseous cavity within a liquid to collapse quickly, emitting a burst of light.

4. Mechanism of sonoluminescence - Wikipedia

   en.wikipedia.org/wiki/Mechanism_of_sonoluminescence

   Surface emission emits a more intense flash of light with a longer duration and is dependent on wavelength. Experimental data suggest that only volume emission occurs in the case of sonoluminescence. [1] As the sound wave reaches a low energy trough, the bubble expands and electrons are able to recombine with free ions and halt light emission.

5. Sonochemistry - Wikipedia

   en.wikipedia.org/wiki/Sonochemistry

   Sound waves propagating through a liquid at ultrasonic frequencies have wavelengths many times longer than the molecular dimensions or the bond length between atoms in the molecule. Therefore, the sound wave cannot directly affect the vibrational energy of the bond, and can therefore not directly increase the internal energy of a molecule.

6. Sound - Wikipedia

   en.wikipedia.org/wiki/Sound

   Sound waves may be viewed using parabolic mirrors and objects that produce sound. [9] The energy carried by an oscillating sound wave converts back and forth between the potential energy of the extra compression (in case of longitudinal waves) or lateral displacement strain (in case of transverse waves) of the matter, and the kinetic energy of ...

7. Neural encoding of sound - Wikipedia

   en.wikipedia.org/wiki/Neural_encoding_of_sound

   The fundamental function of this part of the ear is to gather sound energy and deliver it to the eardrum. Resonances of the external ear selectively boost sound pressure with frequency in the range 2–5 kHz. [2] The pinna as a result of its asymmetrical structure is able to provide further cues about the elevation from which the sound originated.

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9. Spectrum (physical sciences) - Wikipedia

   en.wikipedia.org/wiki/Spectrum_(physical_sciences)

   A source of sound can have many different frequencies mixed. A musical tone's timbre is characterized by its harmonic spectrum. Sound in our environment that we refer to as noise includes many different frequencies. When a sound signal contains a mixture of all audible frequencies, distributed equally over the audio spectrum, it is called white ...