Wave amplitude profiles of (a) the selected acoustic wave sets with $k_z^l=0.11$ km⁻¹ and (b) gravity wave sets with $k_z^l=-0.07$ km⁻¹. Waves tend to be dissipated by the molecular viscosity and thermal diffusivity in a realistic atmosphere, meaning that the amplitude has a maximum value at a certain height, called the “damping altitude”. In a nondissipative atmosphere, the wave amplitude exponentially increases with height and is illustrated by the dashed line.