Violin's A-string is tuned to 440 Hz and its linear density is 7.2 x 10·4 kg/m. ff the length of the string in vibration (measured from the upper end of the fingerboard to the bridge, both ends are fixed.) is 33 cm, A.What is the tension in the A-string? B.What must the linear density of D-string (297 Hz) be so that the tension is the same as A-string? C.The sound level at ad istance of 3 .00 m from a source is 120 dB. At what distance is the sound level 80 dB?
Properties of sound
A sound wave is a mechanical wave (or mechanical vibration) that transit through media such as gas (air), liquid (water), and solid (wood).
Quality Of Sound
A sound or a sound wave is defined as the energy produced due to the vibrations of particles in a medium. When any medium produces a disturbance or vibrations, it causes a movement in the air particles which produces sound waves. Molecules in the air vibrate about a certain average position and create compressions and rarefactions. This is called pitch which is defined as the frequency of sound. The frequency is defined as the number of oscillations in pressure per second.
Categories of Sound Wave
People perceive sound in different ways, like a medico student takes sound as vibration produced by objects reaching the human eardrum. A physicist perceives sound as vibration produced by an object, which produces disturbances in nearby air molecules that travel further. Both of them describe it as vibration generated by an object, the difference is one talks about how it is received and other deals with how it travels and propagates across various mediums.
Violin's A-string is tuned to 440 Hz and its linear density is 7.2 x 10·4 kg/m. ff the length of the string in vibration (measured from the upper end of the fingerboard to the bridge, both ends are fixed.) is 33 cm,
A.What is the tension in the A-string?
B.What must the linear density of D-string (297 Hz) be so that the tension is the same as A-string?
C.The sound level at ad istance of 3 .00 m from a source is 120 dB. At what distance is the sound level 80 dB?
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