Following on from the question How long will it be light on Venus at night?, which is essentially about the visual properties of the Venusian atmosphere, this question is concerned about the sound-related properties.
Given that the properties of sound 'change' when it passes through different materials, densities and temperatures, what would the atmospheric conditions of Venus sound on its surface?
Bonus question what would an opera on Venus sound like?
Using this formula, I get a speed of sound of about 400 m/s for Venus' surface, so a bit higher than on Earth. But that doesn't change how it sounds by much, just your sense of acoustics (being able to gauge the size of a room by how long it takes for reflections to arrive).
Ignoring the whole 'being able to breathe' issue, the higher density (~150 times more dense than air) dampens the vocal cords more, so your opera would sound a few octaves lower.
video: demonstration using helium and sulphur hexafluoride.
