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What are the properties of sound waves?

Ion acoustic wave

Longitudinal wave

Acoustic wave equation

Waveguide (acoustics)

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Sound waves are mechanical waves that propagate through a medium, such as air, water, or solids. They are longitudinal waves, meaning that the oscillation of particles is along the direction of propagation. Sound waves are created by vibrating sources, such as guitar strings, vocal cords, or speaker membranes, which set the medium in motion through compression and rarefaction. The speed of sound in air is 344 m/s at 21 °C and increases with temperature. Sound waves cannot propagate in a vacuum and require a material with properties of inertia and elasticity for their propagation. Sound waves can affect the growth, phytochemical contents, and stress responses of plants, and specific frequencies of sound waves can be used to improve the phytochemical contents of crops. The physical properties of sound waves include the propagation speed, wave equation, superposition of harmonic solutions, Fourier series, acoustic impedance, and dispersion relation.

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Book Chapter•DOI The Nature of Sound John van Opstal 01 Jan 2016 1 Citations	The paper discusses the physical properties of sound waves, including the propagation speed of sound, the wave equation, standing waves, traveling waves, Fourier series, spectral-temporal resolution, acoustic impedance, transmission and reflection at boundaries, and dispersion relation.
Open access•Journal Article•DOI Specific audible sound waves improve flavonoid contents and antioxidative properties of sprouts Joo Yeol Kim, Soo In Lee, Jin A Kim, Muthusamy Muthusamy, Mi-Jeong Jeong - Show less +4 more 27 Jan 2021-Scientia Horticulturae 10 Citations	The paper does not provide information about the properties of sound waves. The paper focuses on the effect of different frequencies of sound waves on the flavonoid contents and antioxidative properties of sprouts.
Book Chapter•DOI from Sound Waves: Isela Guerra 22 Feb 2022 2 Citations	The paper does not provide information about the properties of sound waves.
Book Chapter•DOI General Properties and Character Types of Sound Waves Anatoly Kistovich, Konstantin Pokazeev, Tatiana Chaplina - Show less +2 more 01 Jan 2020	The paper does not provide specific properties of sound waves. It only mentions that sound is alternating in the space and time of compression and rarefaction.
Book Chapter•DOI Sound waves Бердиев У.Т., Нажмиддинов Х., Жураев Ф.Б., Cобиров Ж.С. 01 Jan 2022	The paper does not explicitly mention the properties of sound waves.

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What is sounds as waves?5 answersSounds are waves that propagate through an elastic medium, such as air, water, or solids, causing pressure oscillations. These waves are created by vibrating sources like guitar strings, vocal cords, tuning forks, or loudspeaker diaphragms. Sound waves have frequencies ranging from one to tens of thousands of Hertz, with the maximum human hearing ability at 20 kHz. The speed of sound in air is 344 m/s at 21 °C, increasing with temperature. Acoustic sensors use electrical energy to create mechanical vibrations that disturb the air, producing sound at audible frequencies. Data sonification techniques have been employed to convert COVID-19 case patterns into audible sounds, offering an intuitive way to perceive the pandemic's evolution through sound waves.

Can sound waves cause levitation?5 answersYes, sound waves can cause levitation. Standing waves generated by acoustic emitters can trap particles at pressure nodes, allowing for the levitation of particles of various materials and sizes without the need for a closed-loop controlling system. The superposition of two opposing ultrasonic waves can create a more effective standing-wave field, facilitating the levitation of centimeter-sized thin disks. A sound wave levitation device using radiation pressure can levitate a glass ribbon by conveying it over a diaphragm and reflector system. Controlled levitation of particles in the air can be achieved using wideband ultrasonic waves and counterpropagating emitters. A sound wave levitation device can efficiently vibrate a vibrating body by accurately detecting its resonance frequency using an excitation side vibrator.

How can sound waves be used to analyze the space environment?5 answersSound waves can be used to analyze the space environment by characterizing audible sound fields over space and reconstructing three-dimensional sound fields inside a room using optical data. Additionally, sound can be used as an adjunct to current data visualization techniques to explore, analyze, and augment signatures in space physics data. By decomposing space physics data sets into different components of interest, such as frequency and oscillatory modes, sound can help identify visually ambiguous signals and increase sensitivity to signals occurring in the presence of visual noise. Furthermore, the use of sound together with visual display, synchronized through a fourth cue, has been shown to help space scientists identify events masked by noise in 2D data.

How can sound waves be used to analyze the environment?4 answersSound waves can be used to analyze the environment in various ways. One approach is through the classification of environmental sounds using deep learning techniques. This involves using neural networks to learn high-level features from audio clips and predict the class of the sound. Another method is the use of ambient audio acquisition systems, such as IoT devices, to gather information about noise levels in a specific area. These systems can chart the environment based on averaged sound parameters over time, allowing for the detection of nuisance noise and hazardous sound levels. Additionally, sound analysis can be used to recognize acoustic events and scenes, utilizing deep neural networks to capture temporal features and detect nonlinear combinations of those features. Furthermore, sound data collected from smart devices can be analyzed to understand and distinguish auditory spatial scenes, improving the recognition of environments that may impact people's safety.

What happens to sound waves when they pass through acoustic panels?5 answersWhen sound waves pass through acoustic panels, their transmission and behavior can be altered depending on the specific characteristics of the panel. One approach to improving sound insulation properties is through the use of passive elements that can alter the frequency response of the vibrating structure, known as the frequency response shaping method. Another method involves the use of an iron core coil inserted into a panel, which can decrease and prevent inter-floor noise transmission. Acoustic actuators bonded to a flat panel display can generate enhanced direct acoustic fields, resulting in high sound quality. The transmission of sound through a double-leaf metallic panel partition clamp can be significantly enhanced at a specific frequency due to the mass-air-mass effect of the double-panel partition system. A medium density fiberboard with a sound insulation component can effectively block, reduce, and diffuse sound waves, resulting in improved sound insulation.

How do sound waves interact with each other and with other objects?5 answersSound waves can interact with each other and with other objects in various ways. Acoustic waves can create attractive forces between objects in water, allowing for accurate positioning of one object above another. In robotics, sound can be used as a key sense to capture the interplay of all senses and build a rich physical understanding of the world. Sound is indicative of fine-grained object class information and can differentiate between different objects. It also contains information about the causal effects of an action, allowing for the prediction of the action applied to an object based on the sound produced. Additionally, sound can be used to derive object representations and predict forward models better than passive visual embeddings. The interaction of sound waves with submerged objects can be analyzed using diffraction theory, providing insights into force coefficients and pressure distributions.

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