Group+4

= =

= =

Properties of sound waves.
Frequency- the number of complete cycles per unit time for periodic motion || how fast the source of sound wave is vibrating || Loudness- physical response to intensity of sound || sound intensity and waves amplitude distance from sound source || There is a difference in pitch because there is a different length of tubing
 * **Properties** || **Definition** || **Depends on** ||
 * ** Speed ** || the ratio of the distance an object moves to the amount of time the object moves || density of medium and how elastic the medium is ||
 * **Frequency and pitch** || Pitch- frequency of sound as you perceive it
 * ** Intensity and loudness ** || Intensity- rate at which waves energy flows through a given area

=Uses =
 * Ultrasound **
 * Used in a variety of applications (Sonar, ultrasound imaging)
 * Sonar- determining distance to an object underwater
 * A frequency higher then most people can hear
 * Hearing with Ears **
 * Three main regions of the ear
 * Outer- gathers and focuses sound for middle ear
 * Middle- receives and amplifies vibrations
 * Inner- uses nerve endings to sense vibrations and send signals to the brain
 * Music **
 * Resonance- response of a standing wave to another wave of the same frequency
 * Can vary in pitch by frequency of standing waves
 * changes by the length of tubing or the length/thickness of strings
 * Doppler Effec **t
 * change in sound frequency caused by motion of the sound source
 * discovered by Christian Doppler
 * as a source of sound approaches higher frequency when it moves away frequency lowers

media type="custom" key="5862755" width="180" height="180"