Answer :
Both guitar and violin strings produce longitudinal waves. When these waves reflect back and forth between two points, they create standing waves which give rise to the different notes played on the instrument.
Unlike seismic waves, which are caused by earthquakes, guitar and violin strings produce waves that are audible to the human ear. Ultrasound waves, on the other hand, have a frequency higher than the range of human hearing and are used in medical imaging.
In summary, the waves produced by guitar and violin strings are longitudinal and create standing waves to produce different notes. These waves are audible to the human ear and different from seismic waves caused by earthquakes. Ultrasound waves, however, have a higher frequency and are used in medical imaging.
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