A man he uses a call with a power of 200 Watts to signal to two people that he is under distress. Assuming the call emanates from the man as a point source, what would the intensity of the sound be to the one person who is 100 m away? b.) By what factor does the intensity of the sound decrease when it reaches the second person 500 m away? c.) If the call has an frequency of 4,000 Hz and the speed of sound is 344 m/s, then what is the wavelength of the sound waves produced?
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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