Abstract
Acoustics-based methods offer a powerful tool for sensing applications. Acoustic sensors can be applied in many fields ranging from materials characterization, structural health monitoring, acoustic imaging, defect characterization, etc., to name just a few. A proper selection of the acoustic wave frequency over a wide spectrum that extends from infrasound (<20 Hz) up to ultrasound (in the GHz–band), together with a number of different propagating modes, including bulk longitudinal and shear waves, surface waves, plate modes, etc., allow acoustic tools to be successfully applied to the characterization of gaseous, solid and liquid environments. The purpose of this special issue is to provide an overview of the research trends in acoustic wave sensing through some cases that are representative of specific applications in different sensing fields. [...]
Highlights
Acoustics-based methods offer a powerful tool for sensing applications
The propagation of the S0 Lamb mode along β-SiC/c-AlN composite plates is theoretically studied in Reference [2] for application to the design of temperature-compensated, enhanced-coupling, GHz-range gravimetric sensors
In Reference [3] a statistical propagation model is developed in which the transmission loss in time-varying and location-sensitive acoustic environment, such as an underwater channel, is treated as a random variable
Summary
Acoustics-based methods offer a powerful tool for sensing applications. Acoustic sensors can be applied in many fields ranging from materials characterization, structural health monitoring, acoustic imaging, defect characterization, etc., to name just a few. The propagation of the S0 Lamb mode along β-SiC/c-AlN composite plates is theoretically studied in Reference [2] for application to the design of temperature-compensated, enhanced-coupling, GHz-range gravimetric sensors. The theoretically predicted SiC/AlN-based sensor performances are compared to those of surface acoustic waves and Lamb S0 mode mass sensors implemented on bulk
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