scispace - formally typeset
Search or ask a question

What are the Lamb waves? 


Best insight from top research papers

Lamb waves are acoustic waves that propagate along thin-walled structures guided by their boundaries. These waves can travel long distances without losing much energy, reducing the need for sensors to monitor the structure . Lamb waves are essential in nondestructive testing and structural health monitoring. Previous studies have separated Lamb modes based on surface vibration information, but recent work has used Laser Doppler Vibrometer (LDV) devices to measure vibrations in transparent media, providing more abundant information inside . Lamb waves can be used for wireless power transmission (WPT) based on piezoelectric wafer active sensors (PWASs). By optimizing the Lamb waves-based WPT system, the received power can be significantly increased, making it suitable for powering internet-of-things (IoT) sensor nodes (SNs) .

Answers from top 5 papers

More filters
Papers (5)Insight
Lamb waves are A0 single-mode waves that are excited on a 1.6 mm aluminum plate at a frequency of 150 kHz for power transmission in the Lamb waves-based wireless power transmission system described in the paper.
Lamb waves are A0 single-mode waves that are excited on a 1.6 mm aluminum plate at a frequency of 150 kHz for power transmission in the Lamb waves-based wireless power transmission system described in the paper.
Lamb waves are waves that propagate in a plate-like structure, such as a transparent plate made of PMMA, as mentioned in the paper.
Lamb waves are waves that propagate in a plate-like structure, such as a transparent plate made of PMMA, as mentioned in the paper.
The paper provides information about Lamb waves, which are acoustic waves that propagate along a thin walled structure while guided by its boundaries.

Related Questions

What is Sound as waves?5 answersSound, as waves, is a mechanical disturbance that propagates through a medium, such as air, water, or solids, by creating alternating compressions and rarefactions. It is characterized by longitudinal oscillations, where particles of the medium vibrate in the same direction as the wave's propagation. This disturbance of ambient pressure or density is what we perceive as sound through our auditory system. Sound waves are generated by vibrating sources like strings, vocal cords, tuning forks, or loudspeaker diaphragms, creating periodic compressions and rarefactions that travel through the medium. Acoustic waves, as a branch of acoustics, study these oscillatory movements of compressible mediums, with local and global properties influenced by factors like temperature, pressure, and medium boundaries. In essence, sound waves are pressure oscillations traveling through elastic mediums, triggered by vibrating surfaces or turbulent fluid flows.
What is sound wave?5 answersA sound wave is a mechanical disturbance that travels through a medium, such as air, water, or solids, as a longitudinal wave, where particles oscillate in the same direction as the wave's propagation. These pressure oscillations are caused 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 characteristics of a sound wave include velocity, frequency, and wavelength, which are determined by the source of the vibration and the medium through which the wave propagates. Acoustic waves can be created and detected using piezoelectric materials, revolutionizing acoustic wave sensors and devices.
What is the application of waves?5 answersWAVES is a web application that is dedicated to bioinformatic tool integration. It provides an efficient way to implement a service for any bioinformatic software. The application automatically makes these services available through web pages, web forms, and a RESTful web services API. WAVES can perform computation on various resources and environments, such as Galaxy instances, to fulfill the service's computational needs. It was developed with Django, a Python-based web framework, and is fully portable, requiring only a Python installation to run. The source code and documentation for WAVES are available online. Additionally, there is another application called Wave, which is a processing framework designed for bulk data processing, incremental computing, and iterative processing. It provides a uniform application interface and simplifies parallel programming on clusters.
What are the properties of sound waves?5 answersSound 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.
How can the velocity of lamb waves be measured?5 answersThe velocity of Lamb waves can be measured using various methods. One method involves capturing the zero-crossing instances of the signals closest to the signal envelope peaks and using these instances to determine the phase and group velocities. Another method utilizes a chirp excitation to provide Lamb wave responses at a wide range of frequencies. The group delay and phase shift at each frequency point are then estimated using the analytical cross-correlation method, and the phase velocity values are calculated based on the relations between the propagation distance, group delay, and phase shift. Additionally, the appearance of infinite group velocity points in Lamb wave dispersion curves can be studied using a combined method of Cauchy sextic formalism and the exponential fundamental matrix method. Furthermore, a zero-group velocity resonance method based on laser ultrasonic Lamb waves can be used to measure the thickness of each layer in a thin bilayer with uneven thickness at the interface. Finally, a contact technique using lightweight and low-profile direct-write piezoelectric ultrasonic transducers has been explored to generate and detect zero-group velocity Lamb waves, overcoming the drawbacks of conventional piezoelectric transducers.
What is the definition of an ultrasound wave?3 answersAn ultrasound wave is a mechanical sound wave with frequencies higher than the upper range of human hearing, which is above 20 kHz. It is produced through the use of a transducer that converts electrical signals into mechanical vibrations and vice versa. Ultrasound can also be generated by ultrasonic generators that convert other forms of energy into ultrasound waves. Ultrasound waves propagate through a material and can undergo reflection, refraction, transmission, diffraction, and absorption. Ultrasound has various applications in fields such as medicine, navigation, and defectoscopy. The generation and perception of sound, including ultrasound, is a result of the transmission of mechanical energy through an elastic medium. Ultrasound refers to sound waves with frequencies higher than 20 kHz, which are beyond the range of human hearing. Ultrasound is produced by a piezoelectric effect and its propagation is influenced by the characteristics of the medium, resulting in various interactions such as reflection, refraction, absorption, scattering, transmission, and attenuation.