Question

How far must you be from a 110 W speaker to have a sound level of...

How far must you be from a 110 W speaker to have a sound level of 70.0 dB? (Hint: What is the intensity there?) (Treat the speaker as a point source) Unit = m
Science   Physics   
0 0
Add a commentTranscribed image text
Next >

Homework Answers

Answer #1

Power of the speaker = P = 110 W

Distance from the speaker = R

Sound level at this distance from the speaker = = 70 dB

Sound intensity at this distance from the speaker = I

The power of the speaker is distributed equally in a spherical manner.

R = 935.6 m

Distance from the 110 W speaker to have a sound level of 70 dB = 935.6 m

0 0
Know the answer?
Your Answer:

Post as a guest

Your Name:

What's your source?

Earn Coins

Coins can be redeemed for fabulous gifts.

Log In

Sign Up

Not the answer you're looking for?
Ask your own homework help question
Similar Questions
A person standing 1.25 m from a portable speaker hears its sound at an intensity of...
A person standing 1.25 m from a portable speaker hears its sound at an intensity of 7.90 ✕ 10−3 W/m2. HINT (a) Find the corresponding decibel level.   dB (b) Find the sound intensity (in W/m2) at a distance of 36.0 m, assuming the sound propagates as a spherical wave.   W/m2 (c) Find the decibel level at a distance of 36.0 m.
At a particular site, you notice that the sound intensity and the sound intensity level from...
At a particular site, you notice that the sound intensity and the sound intensity level from a source are respectively I1 and β1. You then ask the sound crew to increase the sound until the sound intensity level (in dB) doubles and the sound intensity (in W/m2) quadruples. Determine the sound intensity level of the initial sound at your site..
The sound intensity level of 0 dB is defined as the threshold for hearing value of...
The sound intensity level of 0 dB is defined as the threshold for hearing value of I0 = 10-12 W/m2. a) What is the sound intensity (in W.m-2) for a sound level of 46 dB? b) The intensity of sound emitted from a point source decreases with the square of the distance according I2 = I1.(d1/d2)2. Given that the sound level intensity of 46 dB is obtained at a point d1 = 6.8 cm from a source, at what distance...
1.What is the sound level 306 m from a 0.0802 W speaker? 2.A horn sounds a...
1.What is the sound level 306 m from a 0.0802 W speaker? 2.A horn sounds a 369 Hz tone. How fast would you have to run away from it for it to sound like 253 Hz? (v = 343 m/s)
14.5 When the volume knob is turned up, the sound level changes from 50 dB to...
14.5 When the volume knob is turned up, the sound level changes from 50 dB to 87 dB. What is the ratio of the intensities in W/m2 ? 14.6 If the sound intensity level in decibels at a location 42 m from a spherical source is 37 dB, what is the power output of the source?
An ultrasound machine in a hospital uses a sound source at 5.10000MHz. Assuming that the speed...
An ultrasound machine in a hospital uses a sound source at 5.10000MHz. Assuming that the speed of the ultrasound in the body is same as water (1440 m/s), determine the wavelength in the body. If blood cells are moving towards the sound source at a speed of 0.8 m/s, at what frequency do the crests of the sound wave pass through the blood cell? What is the frequency of the sound waves reflected back towards the source by the blood...
A sound source is generating 180 W of sound energy in all directions. A person is...
A sound source is generating 180 W of sound energy in all directions. A person is moving toward the source at 0.40 m/s. When he is 50 m away, a. What is the intensity of sound in dB? b. What is the rate at which the intensity of sound is increasing in dB/s?
Lets go ahead and assume that we have a sound source is generating 180 W of...
Lets go ahead and assume that we have a sound source is generating 180 W of sound energy that is going in all directions. And also lets say that there is a women that is moving toward the source at 0.40 m/s. When she gets right to 50 m away, a. What is the intensity of sound in dB? b. What is the rate at which the intensity of sound is increasing in dB/s?
Lets go ahead and assume that we have a sound source is generating 180 W of...
Lets go ahead and assume that we have a sound source is generating 180 W of sound energy that is going in all directions. And also lets say that there is a women that is moving toward the source at 0.40 m/s. When she gets right to 50 m away, a. What is the intensity of sound in dB? b. What is the rate at which the intensity of sound is increasing in dB/s?
Sound 1 or sound 2 can be played through a speaker. A) Sound 1 has a...
Sound 1 or sound 2 can be played through a speaker. A) Sound 1 has a sound level(B1) that is 9dB greater than the sound level(B2) of sound 2. What is the relationship between the intensity of sound 1 and the intensity of sound 2? B) The sound level(B1) of sound 1 is 2 times the sound level (B2) of sound 2. What is the relationship between the intensity of sound 1 and the intensity of sound 2? C) A...
ADVERTISEMENT
Need Online Homework Help?

Get Answers For Free
Most questions answered within 1 hours.

Ask a Question
ADVERTISEMENT