In acoustics, the pressure of sound waves decreases as the distance from a point source increases. This relationship is known as the inverse square law. According to the inverse square law, the sound pressure level (SPL) at a given distance from a point source is inversely proportional to the square of the distance.
Mathematically, the relationship can be expressed as:
SPL ∝ 1/distance²
Where SPL represents the sound pressure level, and distance refers to the distance from the point source. This means that as you move farther away from the source of sound, the sound waves spread out over a larger area, causing the sound pressure to decrease.
It's important to note that this relationship assumes an idealized situation where there are no obstructions or reflections that might affect the sound propagation. In real-world scenarios, factors such as atmospheric conditions, obstacles, and environmental characteristics can influence the sound pressure levels at different distances.