Question
Asked Feb 10, 2020
26 views

Calculate the increase in sound level resulting from using an ear trumpet to aid in hearing. Take the effective area of the trumpet to be 900 cm2, the eardrum’s area to be 0.500 cm2, and assume the trumpet is 5.00% efficient in routing the sound to the eardrum.

check_circle

Expert Answer

Step 1

The equation for the intensity of sound is

Physics homework question answer, step 1, image 1

For sound having same power, the relation between the area and intensity is

Physics homework question answer, step 1, image 2

 

Step 2

The trumpet is 5.00% efficient in routing the sound to the eardrum, the ratio of intensity of sound is

Physics homework question answer, step 2, image 1

...

Want to see the full answer?

See Solution

Check out a sample Q&A here.

Want to see this answer and more?

Solutions are written by subject experts who are available 24/7. Questions are typically answered within 1 hour.*

See Solution
*Response times may vary by subject and question.
Tagged in

Science

Physics

Related Physics Q&A

Find answers to questions asked by student like you
Show more Q&A
add
question_answer

Q: Can you please answer this question and show all of the steps

A: From 0 to 5s, the bus is moving with constant acceleration. From 5 to 10s, bus is decelerating. From...

question_answer

Q: . For a light ray incident on a boundary from air (n = 1.00) to crown glass (n = 1.52), therefracted...

A: The expression from Snell’s law,

question_answer

Q: A baseball is hit with a bat and, as a result, its direction is completely reversed and its speed is...

A: Assume that, the initial velocity is u m/s, so the final velocity is -2u m/s, this negative sign ind...

question_answer

Q: A bird watcher meanders through the woods, walking 1.42 km due east, 0.267 km due south, and 4.04 km...

A: The details given can be demonstrated as

question_answer

Q: A projectile was fired at an angle of 45 degrees to the horizontal plane at a  speed of  300 m/s. Ho...

A: The vertical velocity of the projectile is

question_answer

Q: A disk with a rotational inertia of 5.0 kg ˑm 2 and a radius of 0.25 m rotates on a frictionless fix...

A: The expression for the angular acceleration is,  

question_answer

Q: By bringing two point charges closer together, the force between them is increased by a factor of 29...

A: Write the expression for force between two charges  

question_answer

Q: A negative charge located in a region of positive voltage will move towards higher positive voltage....

A: A region with positive charge implies the higher potential region and a region with negative charge ...

question_answer

Q: What is the work done by the force plotted in the attached graph?

A: The work done by the force is given by