Sound waves move from air to water

[starking]

I want you to help me in resolving these questions
First question
When Down stone in the basin of water eroded the bandwidth with dimension
The Center fell in stone. What explanation
The second question
Sound waves move from air to water. Discussed the impact on
The frequency and speed and Wavelength
Question 3
In winter, we hear voices strong voices low because of strong winds. What exactly is happening
Help me in resolving these questions

 

[Astronuc]

When Down stone in the basin of water eroded the bandwidth with dimension
The Center fell in stone. What explanation

Please elaborate. The English is not clear.

Sound waves move from air to water. Discussed the impact on
The frequency and speed and Wavelength

Water is denser than air. The coupling is poor since the momentum transfer is limited by the difference in density. What is the impact of density (and bulk or elastic modulus) on frequency and speed of sound?

In winter, we hear voices strong voices low because of strong winds.

What happens to the sound waves moving with and against wind? What is the effect of turbulence?