What is the sound intensity level of a jet at 1000 feet?

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Homework Help Overview

The discussion revolves around calculating the sound intensity level of a jet at a lower altitude based on a known intensity level at a higher altitude. The original poster presents a scenario involving sound intensity levels and seeks to understand the relationship between distance and intensity.

Discussion Character

  • Exploratory, Assumption checking, Mathematical reasoning

Approaches and Questions Raised

  • Participants explore the relationship between sound intensity and distance, with one suggesting the use of power and intensity equations. Questions arise regarding the definitions of variables and the implications of changing altitudes on sound intensity.

Discussion Status

Participants are actively engaging with the problem, with some offering guidance on relevant equations and others questioning the definitions and assumptions related to the variables involved. There is a clear exploration of the problem without a consensus on the next steps.

Contextual Notes

The original poster mentions a specific sound intensity level at one altitude but lacks information about the radius or area relevant to the calculations. The discussion includes uncertainty about how to relate the two different altitudes in terms of sound intensity.

phytitan
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Homework Statement



A jet traveling overhead at an altitude of 5000 feet produces a sound intensity level of 80 dB. What would the figure be for an eight of 1000 feet?


Homework Equations





The Attempt at a Solution

 
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If you know the intensity of the sound wave at a certain distance from the source, then you can find the power of the source. Do you remember the equation that relates the power to intensity? This is a good place to start.
 
Last edited:
I have the intensity of the source and I would calculate the power with the formula P=I*A but I don't have the radius I just have a difference in the two radii. But it's an equation with two unknowns the actual radius and the power.

r1=x at 5000 feet altitude
r2=x + 4000 at 1000 feet altitude

how can I calculate the intensity at 1000 feet?
 
So we have the formula for power, P=IA. What is A in this formula? And when you say radius, with respect to what origin are you referring to? Radius is the distance from where to where?
 

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