This page explores various magneto-acoustic and electro-acoustic devices, highlighting loudspeakers, magnetostrictive devices, and the dual role of electro-acoustic components as actuators and sensors...This page explores various magneto-acoustic and electro-acoustic devices, highlighting loudspeakers, magnetostrictive devices, and the dual role of electro-acoustic components as actuators and sensors. It also discusses opto-acoustic-wave transducers and their role in signal processing, as well as the use of shear waves for filters and transformers. High-Q resonators are noted for their construction from quartz, owing to its excellent mechanical properties.