The word is acoustics.
Acoustics is the study of sound and sound waves. It encompasses the generation, transmission, and reception of sound, as well as the effects of sound on different mediums.
Acoustics.
Acoustics is the study of sound and sound waves, including their production, transmission, and effects. It explores how sound interacts with its environment and how it can be measured and manipulated.
The term for the recurrence of motion or sound is "vibration." It refers to the back and forth movement of an object or medium, producing sound waves that repeat in a regular pattern.
Waves of sound.
medium
Abdominal ultrasound is a radiologic study using sound waves beamed into the abdomen to obtain an image of the abdominal viscera.
An oscilloscope is the machine, but it measures frequency.... so sound waves are measured by frequency
medium
The term is cetology.
ontology
Geography.