It stays the same.
It is called the Doppler Effect. When the source of waves approaches you (can be any type of waves - mechanical, electromagnetic like light etc.), the wavelength gets smaller and frequency higher. So when a car approaches you, you hear higher tone than when it departs.
If the source of a sound is moving towards you, then the pitch of the soundyou hear is higher than the pitch of sound that the source is actually emitting.The rate of speed doesn't matter.BTW ... this also happens if you are moving toward the source.
The loudness of the sound has no effect on its speed.
He moves his legs at the speed of sound.
The speed increases.
The frequency of a sound wave does not affect the speed at which the wave moves. The speed of sound in a medium is determined by the properties of that medium, such as its density and elasticity. However, frequency does impact the pitch of the sound we hear.
In the Doppler effect lab, we demonstrated that the speed of a sound source affects the pitch perceived by an observer. As the source moves towards the observer, the frequency (pitch) increases, and as the source moves away, the frequency decreases. This change in frequency is due to the compression and rarefaction of sound waves as the source moves relative to the observer.
dissaipates
The waves compress which causes a lower tonal quality.
No. The denser the material, the faster sound moves through it.
Much of the sound will be reflected (the amount reflected will depend on the angle of incidence). If the angle of incidence is low enough, the sound will be completely reflected. The portion which is transmitted into the water, if any, will be refracted because of the difference in the speed of sound between air and water. Since the speed of sound in water is greater than the speed of sound in air, the sound will be refracted toward the surface of the water. Note that this is the opposite of what happens with light which has a slower speed in water than in air and is refracted away from the surface of the water.
It moves at a slower speed!