(c) Assume the choir sings the melody with a uniform sound level of 81.0 dB. Find the pressure amplitude of the first note (in Pa). 32.078 Apply the definition of sound level and solve for I, then use the relationship between pressure amplitude and intensity to find ΔΡ. Pmax. Pa (d) Assume the choir sings the melody with a uniform sound level of 81.0 dB. Find the pressure amplitude of the last note (in Pa). pa (e) Find the displacement amplitude of the first note (in m).
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 piece of music is written so that the first note is 130.81 Hz and the last note is 880 Hz. (Use 343 m/s as the speed of sound,
and 1.20 kg/m³ as the density of air.)
(a) Find the wavelength of the first note (in m).
2.62
(b) Find the wavelength of the last note (in m).
0.389
m
(c) Assume the choir sings the melody with a uniform sound level of 81.0 dB. Find the pressure amplitude of the first note (in
Pa).
m
32.078 X
Apply the definition of sound level and solve for I, then use the relationship between pressure amplitude and intensity to
find AP max. Pa
Pa
(d) Assume the choir sings the melody with a uniform sound level of 81.0 dB. Find the pressure amplitude of the last note (in
Pa).
m
(e) Find the displacement amplitude of the first note (in m).
(f) Find the displacement amplitude of the last note (in m).](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F2a87bda2-77ee-4643-b996-8126adae9acf%2Fdff79fe8-48d3-44a2-9721-a7506be04d19%2F4dak01b_processed.jpeg&w=3840&q=75)
![](/static/compass_v2/shared-icons/check-mark.png)
Trending now
This is a popular solution!
Step by step
Solved in 3 steps
![Blurred answer](/static/compass_v2/solution-images/blurred-answer.jpg)
![College Physics](https://www.bartleby.com/isbn_cover_images/9781305952300/9781305952300_smallCoverImage.gif)
![University Physics (14th Edition)](https://www.bartleby.com/isbn_cover_images/9780133969290/9780133969290_smallCoverImage.gif)
![Introduction To Quantum Mechanics](https://www.bartleby.com/isbn_cover_images/9781107189638/9781107189638_smallCoverImage.jpg)
![College Physics](https://www.bartleby.com/isbn_cover_images/9781305952300/9781305952300_smallCoverImage.gif)
![University Physics (14th Edition)](https://www.bartleby.com/isbn_cover_images/9780133969290/9780133969290_smallCoverImage.gif)
![Introduction To Quantum Mechanics](https://www.bartleby.com/isbn_cover_images/9781107189638/9781107189638_smallCoverImage.jpg)
![Physics for Scientists and Engineers](https://www.bartleby.com/isbn_cover_images/9781337553278/9781337553278_smallCoverImage.gif)
![Lecture- Tutorials for Introductory Astronomy](https://www.bartleby.com/isbn_cover_images/9780321820464/9780321820464_smallCoverImage.gif)
![College Physics: A Strategic Approach (4th Editio…](https://www.bartleby.com/isbn_cover_images/9780134609034/9780134609034_smallCoverImage.gif)