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## Acoustic Variables - Each back and forth movement completes **one wave** or **once cycle** of movement. - Each cycle consists of two parts: - **Compression** - Where the molecules are pushed closer together. - **Rarefaction** - Where they spread wider apart. The image...
## Acoustic Variables - Each back and forth movement completes **one wave** or **once cycle** of movement. - Each cycle consists of two parts: - **Compression** - Where the molecules are pushed closer together. - **Rarefaction** - Where they spread wider apart. The image shows a diagram of a sound wave consisting of compression and rarefaction. The diagram shows **one cycle** of the wave, which is the distance between two successive crests or troughs. The **wavelength** is the horizontal distance between two successive crests or troughs. The **amplitude** is the maximum displacement of the wave. **Propagation** is the direction the wave travels, which is from left to right in this diagram.
