A barangay mobile is roving around your barangay. They are announcing the new guidelines regarding COVID-19 prevention using a megaphone with a frequency of 290 Hz. The speed of sound is 340 m/s and the air is still. You are riding your bicycle pedaling away at 20 m/s while the barangay mobile is at rest. Solve for frequency heard by the listener.
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.
A barangay mobile is roving around your barangay. They are
announcing the new guidelines regarding COVID-19 prevention
using a megaphone with a frequency of 290 Hz. The speed of
sound is 340 m/s and the air is still. You are riding your bicycle pedaling away at 20 m/s while the
barangay mobile is at rest. Solve for frequency heard by the listener.
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