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properties of sound wave

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Jorgette Dayandayan

on 4 February 2013

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Transcript of properties of sound wave

Reflection, Refraction, Diffraction, Interference Properties of Sound Wave Reflection Doppler Effect Questions Is the bouncing of waves when they hit a surface. Resonance What is Doppler effect? Give examples of places where reflection of sound waves can be found. Resonance Doppler Effect 11 Gab Dato
12 Jorgette Dayandayan
26 Jazmine Olivares
29 Jamie Parangue Refraction Diffraction Interference Examples change in direction , speed or bending of waves due to a change in its medium. bending of waves around small obstacles and the spreading out of waves as they pass through openings Wave interference is the phenomenon that occurs when two waves meet while traveling along the same medium. TYPES Constructive occurs at any location in the medium and displacement is in the same direction Destructive Additional Information Speed of sound in air at STP (Standard temperature and pressure) is 331 m/s It is the vibration of an object at its natural frequency. When one object vibrating at the same natural frequency of a second object forces that second object into vibrational motion. Cause of sound production in musical instrument resound RESONANCE occurs at any location in the medium and displacement is in the opposite direction deadspot occur when the compressions of one wave line up with the rarefactions from another wave and cancel each other. Constructive: waves reinforce each other
result is intensified sound Destructive: waves cancel each other.
result is diminished sound. apparent change in the frequency of a wave because of relative motion between the observer and the source TRIVIA: Doppler Effect is named after the Austrian physicist Christian Doppler, who proposed it in 1842 in Prague Same speed Produces series of concentric circles Reach the edges of the water puddle at the same frequency Frequency at which disturbances reaches the edge = Frequency at which the bug produces the disturbances less time to reach B B observes that the frequency of arrival of the disturbances is higher than the frequency at which disturbances are produced. A observes a frequency of arrival that is less than the frequency at which the disturbances are produced. The net effect of the motion of the bug (the source of waves) is that the observer towards whom the bug is moving observes a frequency that is higher than the disturbances produced; and the observer away from whom the bug is moving observes a frequency that is less than the disturbances produced. This effect is known as the Doppler Effect. The Doppler effect can be observed for any type of wave - water wave, sound wave, light wave, etc. True or False: Rooms with rough wall surfaces tend to reflect sound waves better. Sound is a mechanical wave Can travel through air, water, wood and even steel. Longitudinal wave = particles moving in the same direction Frequency range of sound is 20Hz to 20 000Hz V = d / t V = f * Wavelength Sound waves propagates in straight lines, in all directions Sound reflects on surface Superposition Behavior of multiple waves traveling through the same location at the same time at the same medium. Total displacement is the sum of all the displacements of the waves A car's horn produces a sound wave of constant frequency. As the car up going away from a stationary spectator, the sound wave detected by the spectator..

A. Decreases in amplitude and decreases in frequency
B. Decreases in amplitude and increases in frequency
C. Increases in amplitude and decreases in frequency
D. Increases in amplitude and Increases in frequency Sound waves strikes a glass and cause it to shatter. This phenomenon illustrates:
A. Reflection
B. Resonance
C. Refraction
D. Diffraction Resonance occurs when when one vibrating object transfers energy to a second object causing it to vibrate . The energy transfer is most efficient when compared to the 1st object, the second object has the same natural ________
A. Frequency
B. Loudness
C. Amplitude
D. Speed
2 waves approaching each other from opposite directions in the same medium. Draw the waves after they have passed through each other. Small obstacles and long wavelengths provide _____ A. Minimum diffraction
B. Same diffraction
C. Maximum diffraction reverberation: is the persistence of sound in a particular space after the original sound is produced END
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