Sound

Sound __ Speed of sound: __ A sound wave is a pressure disturbance that travels through a medium by means of particle-to-particle interaction. As one particle becomes disturbed, it sends a force on the next adjacent particle, there for disturbing that particle from rest and transporting the energy through the medium. __ Vibration and Pitch: __

__ Vibration: __ Vibration is an occultation of an objects equilibrium has been disturbed from an electromagnetic wave.

__ Pitch: __ Pitch is the quality of sound determined by the rate of the vibrations producing it.

__ Echos: __ A sound or series of sounds caused by the reflection of sound waves from a hard surface. Surfaces that are soft do not rebound sound waves they absorb them. __ Doppler effect: __ When wave energy like sound or radio waves travels from two objects, the wavelength can seem to be changed if one or both of them are moving. This is called the Doppler effect. The Doppler effect causes the received frequency of a source to differ from the sent frequency if there is motion that is increasing or decreasing the distance between the source and the receiver. __ Resonance: __ Resonance is the tendency of a system to oscillate a greater amplitude at some frequency than others. These are known as the systems resonant frequencies. At these frequencies, even small periodic driving forces can produce large amplitude oscillations, because the system stores vibrational energy.