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The factors of the sound of a guitar string are tuning the string (changes the tension; the tighter the higher) and pressing down on the fret (changes amount of string that vibrates; the shorter the higher)
The velocity, v, of a wave in a taut string is dependant on the tension in the string, T, and the mass distribution (or mass per length ratio), μ.v2 = T/μ
In the case of a guitar string, the tension.
Tensionin a sound waves makes the sound harsher sound or softer sound
A longer string will have a greater distance between peaks of the waves of the vibration, so a sound will be lower on the sound wave scale.
the tension on the strings are what gives each string the "tone"
The sound post is the cylindrical piece of wood set upright inside of the violin to keep the body from collapsing from the string tension
Yes, and so does the length.
When a string, cable, or other elongated object is under increased amounts of tension, it will vibrate at a correspondingly higher frequency. In terms of sound, as you tighten your guitar string, the pitch goes up.
When mounted on an acoustic guitar the body serves as a soundboard to amplify the vibration of the strings. On a unplugged solidbody electric guitar you will notice that the sound is very similar to the string mounted to the workbench.
If you put a viola c string on a violin, it will probably sound like a rubber band because the violin is not big enough to allow the sound to develop.
"Pressure" is not what causes strings to produce sound. It's "tension" which does that. Adjusting the tuners either increases or decreases the tension, thus altering the audible pitch. Bending the strings also increases the tension. The sound is due to the vibration of the strings. Greater tension causes a shorter, higher frequency wavelength or amplitude which produces a higher pitch. Lesser tension causes a longer, lower frequency wavelength which produces a lower pitch. Depressing the strings onto the fingerboard effectively shortens the length of the string. The more a string is shortened, the shorter its vibrational wavelength and the higher its frequency will become. The location along the fingerboard at which the string is depressed serves the same function as does the nut when a open string is sounded.