A loudspeaker is driven by an audio oscillator and amplifier, and is adjustable from 1 to 2 [kHz]. It is placed next to a stopped pipe of length 68.8 [cm]. Both of them remain stationary. The speed of sound in air is 344 [m/s]. (a) When I increase the frequency from 1000 [Hz], at what frequency do I first hear resonance? (b) Plot the displacement normal mode of this frequency. (c) Mark the points at which a listener cannot hear anything in this normal mode. (d) What are all the possible resonant frequencies generated by this oscillator?
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 loudspeaker is driven by an audio oscillator and amplifier, and is adjustable from 1 to 2 [kHz]. It
is placed next to a stopped pipe of length 68.8 [cm]. Both of them remain stationary. The speed of
sound in air is 344 [m/s].
(a) When I increase the frequency from 1000 [Hz], at what frequency do I first hear resonance?
(b) Plot the displacement normal mode of this frequency.
(c) Mark the points at which a listener cannot hear anything in this normal mode.
(d) What are all the possible resonant frequencies generated by this oscillator?](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F474a784e-9f95-4813-81d7-a60d3fc34f86%2F4e23fc3e-3d9c-4247-bc6e-e0dae4c681c8%2Fw9m4k1_processed.png&w=3840&q=75)
The length of the pipe closed at one end,
The speed of sound in air,
Trending now
This is a popular solution!
Step by step
Solved in 5 steps with 2 images
