Gravity does not directly impact sound waves themselves. Sound waves are mechanical waves that travel through a medium, such as air or water, and their propagation is primarily determined by the properties of that medium.
However, gravity can indirectly affect the perception of sound. When a sound source is above or below you, the sound waves it produces propagate through the medium (e.g., air) and eventually reach your ears. Gravity can affect the behavior of the medium, causing it to flow differently and potentially influence how the sound waves travel.
In general, when a sound source is above you, the sound waves can propagate more easily downward because gravity helps to pull the medium (e.g., air) down. This can lead to the sound being perceived as louder if it is above you compared to the same distance below you. When the source is below you, the sound waves have to propagate against the force of gravity, which may result in some attenuation or reduction in loudness.
However, it's important to note that the impact of gravity on sound propagation in most everyday situations is relatively small compared to other factors, such as distance, obstacles, and the nature of the surrounding environment. These factors can have a more significant influence on the perception of sound loudness.