Can Sound Rise Like Heat? Searching for Answers...

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Discussion Overview

The discussion centers on whether sound can rise like heat, exploring the behavior of sound waves in different temperature gradients and comparing it to the movement of heat. The scope includes conceptual understanding and technical reasoning related to sound propagation in various media.

Discussion Character

  • Conceptual clarification
  • Debate/contested
  • Technical explanation

Main Points Raised

  • One participant questions the idea that sound rises like heat, seeking clarification on the behavior of sound waves.
  • Another participant asserts that sound is omnidirectional and does not rise, using the analogy of a stone dropped in water to illustrate sound's propagation.
  • A different viewpoint highlights that sound carries energy through directional movement and wavefronts, contrasting it with the chaotic movement associated with heat.
  • A later reply introduces the concept of temperature gradients affecting sound propagation, suggesting that sound waves can bend upward in warmer air and downward in cooler air, referencing the speed of sound's dependence on temperature.

Areas of Agreement / Disagreement

Participants express differing views on the behavior of sound in relation to heat, with no consensus reached on whether sound can be said to rise like heat under certain conditions.

Contextual Notes

The discussion includes assumptions about the behavior of sound in various media and the effects of temperature on sound propagation, which remain unresolved.

hyeclass
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i have been searching for something i am positively sure about but I've been told that i am wrong, i couldn't find anything on the internet...so i thought this to be the best way to find some answers to my question...

is it true that sound ...also rises up like heat...?


pleas answer :)

thanks in advance !
 
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No. Sound is due to pressure fluctuations in a medium, i.e. air. It is omnidirectional if left to its own devices. Think of a stone being dropped in water.
 
hmm, and yet sound carries energy (kinetic, of the moving particles) given while producing the sound.

unlike heat (chaotic movement), sound is directional movement, consisting of wavefronts, and does not stay in one place (sound is heard outside the room where it was produced, disperses away)
 
Wow, I actually find myself (sort of) disagreeing with a Science Advisor here. :wink:

In a medium with a temperature gradient (for example, a mass of air that is hotter at the bottom than the top), sound waves tend to bend toward the colder part. Why? Because the speed of sound varies with temperature! Cooler air conducts sound more slowly. Therefore, if air closer to the ground is warmer, then sound waves will bend upward. If air closer to the ground is cooler, sound waves will bend downwards, and will even bounce along the ground as shown here: http://www.physics.uiowa.edu/adventure/spr_2006/feb_4-06.html (scroll down to "refraction")
 
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