Post on 17-Mar-2016
description
Properties of Sound Waves
WavelengthWavelength
is the distance between two troughs or crests on the waves
AmplitudeAmplitude is
the height of the wave. The higher the amplitude the higher the volume.
FrequencyFrequency is
the number of times the wavelength occurs in one second.
Hertz
1 hertz = I vibration per second
Compressions and Rarefactions
Compressions are the when the waves have lots of particles all bunched up in it and the rarefactions are the spaces or low parts in between the waves
Pitch The pitch is how
high or low a sound is. A high pitch is make by high frequency sound waves. A low pitch is made by low frequency sound waves.
Loudness
The loudness of a sound is determined by the amplitude of the wave. The greater the amplitude the louder the noise
Doppler RadarDoppler Radar
Jared WallaceJared Wallace
Doppler RadarDoppler Radar This method is being used today by Meteorologists to This method is being used today by Meteorologists to
discover even more about weather conditions. Particularly, discover even more about weather conditions. Particularly, severe weather such as tornadoes and harsh thunderstorms. severe weather such as tornadoes and harsh thunderstorms. Doppler radar can see more than rain and other types of Doppler radar can see more than rain and other types of precipitation. It’s able to see the winds inside storms. In some precipitation. It’s able to see the winds inside storms. In some cases, it can even track insects and dust particles and tell a cases, it can even track insects and dust particles and tell a Meteorologists what winds are doing in regions where there Meteorologists what winds are doing in regions where there is no rain. When tornadoes develop they carry rain droplets is no rain. When tornadoes develop they carry rain droplets around in a circle. Doppler radar can even see the raindrops around in a circle. Doppler radar can even see the raindrops going in random directions and tell a forecaster specifically going in random directions and tell a forecaster specifically where the tornado is in some cases.where the tornado is in some cases.
February 21, 2008Doppler Radar for February 25, 2008Doppler Radar for February 25, 2008
HARMONICSALEX H is awesomer than you are!!
Waves
The simplest wave on a guitar string is a sinusoid, when the string is plucked in its center. This creates a pure tone.
The sinusoid creates the fundamental harmonic, or the string’s natural frequency. This is the string’s lowest possible frequency.
More Waves >>
>>
>>
>>
>>
>>
>>
>>
>>
>
As the sinusoid vibrates into an arch, if the string is picked, then it creates a triangular wave, the vertices being the nodes (ends of the string) and the point to where you picked the string out to.
The closer together the nodes, the higher the frequency (pitch). The pitch can also be changed by adjusting the tightness and thickness of the string.
The HARMONIC Sequence
The first harmonic is the fundamental, or the pitch of the open string.
The following harmonics are found by multiplying the fundamental’s frequency by the number of the respective interval. For example, if the fundamental frequency is 150, the second harmonic is 300, and the third harmonic is 450.
The Intervals of the Harmonic Sequence
In the terms of musical intervals, the second harmonic is an octave above the fundamental. The third harmonic is an octave and a fifth above the first, and the fourth harmonic is two octaves above the fundamental. The fifth is 2 octaves and a third above the fundamental, the sixth is an octave and a fifth above the fundamental, and so on.
Review Game Same rules apply
1
What is the distance between two troughs or crests on the waves?
A. Hertz B. Amplitude C. Wavelength D. Frequency
Answer Wavelength
2
The simplest wave on a guitar string is a , when the string is plucked in its center. This creates a pure tone?
A. Sinusoid B. Harmonics C. Triangular Wave D. Fundamental
Answer Sinusoid
3
Doppler Radar is used primarily by who and for what purpose ?
A. Meteorologists; sound waves B. Pediatricians; weather conditions C. Science professors; amplifying microscopes D. Meteorologists; weather conditions
Answer Meteorologists; weather conditions
4
What does the sinusoid create?
Answer The fundamental harmonic, or the
string’s natural frequency. This is the string’s lowest possible frequency.