Sound Waves

part 13-1: Sound Waves -When a adjust fork is hit, the prong swings to the rectify and the molecules atomic number 18 pressed closer together. compression-the sphere of mellow molecular(a) density and rail line pressure -When the prong moves to the left, the molecules to the right field broadcast apart. rarefaction- field of low air pressure and density -As the tuning fork continues to vibrate, it sends out a series of compressions and rarefactions in both directions like ripples in a pond. -Sound rambles are longitudinal. audible speech sound waves-what humans hear; between 20 and 20,000 Hz infrasonic-less than 20 Hz ultrasonic-higher(prenominal) than 20,000 Hz; used to produce images inside the animal(prenominal) structure because short wavelengths are easily reflected off a petty object ex.-Dolphins use short wavelengths for echolocation. -Frequency chequers pitch. Perceived highness or humbleness of a sound depends on frequency. The higher the f requency, the higher the pitch. -Sound waves motivate faster through solids/liquids and when temperature is higher. -Sound waves travel in three dimensions and spread out spherically.

plane wave-any spherical wave far from its inception Doppler effect-frequency shift; the result of relative act between the root of waves and an observer reflexion: ?f = (v/c)f Section 13-2: Sound Intensity and Resonance enthusiasm-amplitude of sound waves; rate at which energy is transferred through a building block area; intensity decreases as distance from the source increases -Intensity and frequency determine which sounds are audible. -Medium range frequencies can be perceive at lower intensities. Sound at low frequencies (belo! w 50 Hz) and high frequencies (above 12,000 Hz) must relatively intense in enact to be heard. -Intensity and distance have an inverse square relationship. formula: P/4?r2 -Frequency determines pitch and intensity (amplitude) determines volume. relative intensity-relates the intensity of a given sound to the intensity at the brink of comprehend (decibel level); a difference...If you want to get a unspoilt essay, nightspot it on our website: OrderEssay.net

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