Four students at a concert notice a balloon near the large speakers moving slightly towards, then away from the speaker during the low-frequency passages. The four students explain this phenomenon . Student A: The wave is a longitudinal wave because sound is made by regions of air being slightly more compressed followed by regions that are slightly less compressed. Student B: The wave is a transverse wave because sound is made by regions of air being slightly more compressed followed by regions that are slightly less compressed. Student C: The wave is a longitudinal wave because sound is made by regions of air moving perpendicular to the sound wave. Student D: The wave is a transverse wave because sound is made by regions of air moving perpendicular to the sound wave Which student correctly identifies the correct wave type and reason behind the balloons movement? (DOK 2) O A. Student B O B. Student D O C. Student C O D. Student A
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.
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