A woman is sitting at a bus stop when an ambulance with a siren wailing at 410 Hz approaches at 28.5 m/s (about 64 mph). Assume the speed of sound to be 343 m/s. (a) What frequency (in Hz) does the woman hear? fa = Hz With what speed vs (in m/s) would the ambulance have to travel in order for the woman to hear the siren at an apparent frequency of fa = 430 Hz? vs = m/s What frequency (in Hz) would the woman hear if the siren moved away from her with the same speed you found in part (b)? fa = Hz
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.
Trending now
This is a popular solution!
Step by step
Solved in 4 steps
