What does the term 'Diffraction' refer to in the context of sound waves?

The term 'Diffraction' in the context of sound waves refers to the phenomenon where sound waves bend around obstacles or spread out after passing through small openings. This ability to change direction is significant because it allows sound to be heard even when there are barriers in the way, enabling sound to reach the listener from multiple paths. This characteristic is especially important in various applications, including underwater acoustics, where sound propagation can be affected by obstacles such as the ocean floor or structures in the water.

Understanding diffraction is crucial for analyzing how sound behaves in real-world environments, particularly in naval operations, where it influences communication and detection capabilities. While other options describe different aspects of wave behavior or sound characteristics, they do not capture the essence of diffraction, which specifically involves the bending of sound waves around objects.