the sound level is 103 dB when one jet engine is roaring 3 more identical jet...

Question

Question

the sound level is 103 dB when one jet engine is roaring 3 more identical jet engines start roaring what is the sound level increased to

science physics

Answer 1

Answer #1

Use equation,

β = (10dB)*log(I/I₀)

β₁ = (10dB)*log(I₁/I₀)

β₃ = (10dB)*log(I₃/I₀)

β₃ - β₁ = (10dB)*[log(I₃/I₀)-log(I₁/I₀)]

β₃ - β₁ = (10dB)*[log(I₃/I₁)]

We are given , I₃/I₁=3, β₁ = 103 dB

β₃ - β₁ = (10dB)*log3

β₃ – 103dB = (10dB)*0.477

β₃ – 103dB = 4.77dB

β₃ = 4.77dB +103dB

β₃ = 107.77 dB

Answer 2

Similar Homework Help Questions

A 25 MW jet engine produces a sound level of 120 dB, the threshold of pain,...

A 25 MW jet engine produces a sound level of 120 dB, the threshold of pain, at 100 m from the engine. (Recall that the threshold of human hearing is 1 x 10-12 W/m2.) (a) What portion of the jet engine power is lost in producing this sound? (b) You are at your quiet summer house (ambient sound level is 40 dB) and you can just hear the sound of the same jet engine at the airport. How far away...
n Review Id During takeoff, the sound intensity level of a jet engine is 150 dB...

n Review Id During takeoff, the sound intensity level of a jet engine is 150 dB at a distance of 22 m. Part A What is the sound intensity level at a distance of 1.0 km? Express your answer to two significant figures and include the appropriate units. НА ? B = 253.7 dB Submit Previous Answers Request Answer X Incorrect; Try Again; 9 attempts remaining
2. (2 pts) A sound level of 150 dB is measured at 2 meters from a...

2. (2 pts) A sound level of 150 dB is measured at 2 meters from a jet engine. Find the sound intensity B of the jet engine at a distance of 20 meters assuming intensity falls off as 1/2. (Hint: First find intensity at 150 dB sound level.) 150dB 150d. B = 10Log G-1z) = 1000 W/m2 B (dB) = 2 m. B = I=100x701450) - 1000 W/m2 1000 11/12 = 'rz 2009 10-12

A.Determine the sound level heard by the guitarist when one speaker is operating .Units dB B.Determine...

A.Determine the sound level heard by the guitarist when one speaker is operating .Units dB B.Determine the sound level heard by the guitanist when both speakers are operating .Units dB A. The frequency of the signal as determined by the motor vehicle .Units MHz B.The frequency determined by the radar speed gun for the signal reflected back to it by the motor vehicle .Units :Hz Two identical speakers are positioned the same distagce from a guitarist. The intensity of sound...
What is the level of a sound whose intensity is 1.6 x 10-6 W/m2? (Io =...

What is the level of a sound whose intensity is 1.6 x 10-6 W/m2? (Io = 1 x 10-12 W/m2) A person standing a certain distance from an airplane with four equally noisy jet engines is experiencing a sound level of 137 db. What would this person experience if the captain shut down all but one engine?
A constant output loudspeaker produces a sound level of 97 dB at 10 feet when located...

A constant output loudspeaker produces a sound level of 97 dB at 10 feet when located at the corner of two walls. What will be the sound level at the same distance if it is placed in an open area? a. 91 b. 94 d. 103 106 e. f. None of the above c. 97 A 200 Hz source radiates sound that produces a SPL of 85 dB at a distance of 1 meter. Is this SPL in the near-field?...

A jet produces a sound level of approximately 140 dB at a distance of 10. m....

A jet produces a sound level of approximately 140 dB at a distance of 10. m. Assuming that your ear has an effective radius of about 2.8 cm, what is the total power received by your ear? P Number Units
The decibel level of the noise from a jet aircraft is 130 dB when measured 24.8...

The decibel level of the noise from a jet aircraft is 130 dB when measured 24.8 m from the aircraft. How much sound power does the jet aircraft emit? Answer in units of W. How much sound power would strike the eardrum of an airport worker 24.8 m from the aircraft? Assume the diameter of the worker’s eardrum is 1.7 × 10−2 m. Answer in units of W.
At the race track, one race car starts its engine with a resulting intensity level of...

At the race track, one race car starts its engine with a resulting intensity level of 108.6 dB at point P. Then 4 more cars start their engines. If the other 4 cars each produce the same intensity level at point P as the first car, what is the new intensity level with all 5 cars running?

What is the sound intensity level (in units of dB) when the intensity of sound is...

What is the sound intensity level (in units of dB) when the intensity of sound is 5.05 mW/m2?