Ultraääniaaltoa

Ultraääniaaltoa refers to sound waves with frequencies higher than the upper audible limit of human hearing. This limit is typically considered to be around 20 kilohertz (20,000 Hz). Therefore, ultrasound is defined as sound with frequencies above 20 kHz. The production and detection of ultrasound are achieved using piezoelectric transducers, which convert electrical energy into mechanical vibrations and vice versa.

The applications of ultrasound are widespread and diverse. In medicine, ultrasound imaging, also known as sonography, is a common diagnostic tool. It uses the reflection of ultrasound waves from internal body structures to create images. Therapeutic ultrasound is used for treatments such as pain relief and tissue healing. In industry, ultrasound is employed for non-destructive testing of materials to detect flaws, for cleaning delicate objects, and in welding plastics. Sonar (Sound Navigation and Ranging) systems, which often utilize ultrasound, are used for underwater navigation, object detection, and mapping the seabed. The energy carried by ultrasound waves can also be used to disrupt biological tissues or to induce chemical reactions in a process called sonochemistry. The behavior of ultrasound waves, including reflection, refraction, and attenuation, depends on the properties of the medium through which they travel.