he provided image shows vibrations from a car idle at 33 Hz. The fourier transform of the data is shown in the bottom plot. Are the following statements true or false? A fourier series that would represent the vibrational data would contain two frequences of 15 Hz and 30 Hz. This data has a vibrational noise at a fundamental frequency of 15 Hz as well as the three overtones to this fundamental. The oscillations seen in the data are due to the vibrational noise at 15 Hz and 30 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.
The provided image shows vibrations from a car idle at 33 Hz. The fourier transform of the data is shown in the bottom plot. Are the following statements true or false?
- A fourier series that would represent the vibrational data would contain two frequences of 15 Hz and 30 Hz.
- This data has a vibrational noise at a fundamental frequency of 15 Hz as well as the three overtones to this fundamental.
- The oscillations seen in the data are due to the vibrational noise at 15 Hz and 30 Hz.
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