The volume of sound created depends on your
level. You can produce as much noise as four normal
humans per
caster level (maximum twenty
humans). Thus, talking, singing, shouting, walking, marching, or running sounds can be created. The noise a
ghost sound spell produces can be virtually any type of sound within the volume limit. A horde of rats running and squeaking is about the same volume as eight
humans running and shouting. A roaring lion is equal to the noise from sixteen
humans, while a roaring dire tiger is equal to the noise from twenty
humans.