What term describes an echo from a sound wave traveling from one medium to another?

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The term that describes an echo from a sound wave traveling from one medium to another is known as "reflection." However, among the choices provided, frequency (C) relates to sound waves in terms of how often a wave completes a cycle in a given amount of time, which can be connected to the occurrence of echoes.

When sound waves travel and then reflect off surfaces or travel between different media (like air to water), different frequencies can be transmitted and perceived. The phenomenon of hearing an echo relies on the sound waves bouncing back, which illustrates how frequency plays a role in the properties of those waves. High-frequency sounds tend to produce clearer echoes compared to lower frequencies.

While amplitude, wavelength, and velocity are important characteristics of sound, they do not directly describe the phenomenon of an echo as it relates to the interaction of sound waves between media. Amplitude refers to the power or intensity of a sound wave, wavelength is the distance between successive peaks of a wave, and velocity is the speed at which the wave travels through a medium. All these factors contribute to how sound is experienced, but when considering the reflection of sound waves and their characteristics, frequency is particularly relevant.

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