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The Physics of Musical Instruments
Transcript of The Physics of Musical Instruments
f = 1.03kv/L2
For drums or other instruments with an indefinite pitch, you would use the equation:
f = (0.764/D)(F/)½ L= the length of the bar, V=the velocity of sound in the object, and k=constant but changes depending on the object Vibration and Resonance Resonance is when one object vibrates at the same frequency of a second object which then forces the second object into vibrational motion When all three types of instruments play together, the vibrations in the instruments create sound waves in the air which in turn create harmonies. Thanks for watching! Sound Basics How to measure a wave Physics? A sound wave is a mechanical longitudinal wave.
This means that the wave needs a median to travel through, such as air. The longitudinal part describes the motion of the wave. This means that the median and the wave are parallel. A wavelength is the shortest distance between two points before the motion is repeated. It is represented by "lambda." Sound waves use two points, one called a compression (the point of highest concentration of particles in the medium) and rarefactions (the points of the least amount of concentrations). Frequency= 1/T
By knowing the frequency of a wave and the wavelength of the wave, you can find out the speed or velocity. V=(lambda)xf Even if all of the instruments play at the same frequency, they will still sound different because they are made out of different materials. v = [ T / (m/L)]^½
T is the tension in Newtons
m is the mass of the string
L is the length of the string Fundamental Frequency:
Has a wavelength equal to 2 times the length of the string. Definite Pitch Examples:
Xylophone and Timpani
Indefinite Pitch Examples:
Snare drum and small "auxiliary percussion" like the Tambourine That sound like this... Physics? Physics?