. A pipe is 2.30 m long. (a) Determine the frequencies of the first three harmonics if the pipe is open at both ends. Take 336 m/s as the speed of sound in air. f₁ = Hz f2 = Hz f3 = Hz (b) How many harmonic frequencies of this pipe lie in the audible range, from 20 Hz to 20000 Hz? (c) What are the three lowest possible frequencies if the pipe is closed at on end and open at the other? f1 = Hz f3 = Hz fs = Hz EXERCISE HINTS: GETTING STARTED II'M STUCK! (a) What length of pipe open at both ends has a fundamental frequency of 3.78 x 102 Hz? Find the first overtone. 1 pipe = m fovertone = Hz (b) If the one end of this pipe is now closed, what is the new fundamental frequency? Find the first overtone. ffundamental = Hz fovertone = Hz (c) If the pipe is open at one end only, how many harmonics are possible in the normal hearing range from 20 to 20000 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.
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