Thermoacoustics is a field of research that studies the interaction between heat and sound waves. It involves the generation and control of sound waves through the manipulation of temperature gradients in a medium, typically a gas. Thermoacoustic devices are used in a variety of applications, including refrigeration, power generation, and sound production. Researchers in thermoacoustics study the fundamental principles behind the conversion of heat to sound and vice versa, as well as designing and optimizing devices for specific applications.