'speed' of sound vs. 'feel' of sound? (e.g. subwoofer, tree falling, etc.)

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Discussion Overview

The discussion revolves around the relationship between the 'speed' of sound and the 'feel' of sound, particularly in contexts such as bass from subwoofers, falling trees, and explosions. Participants explore whether these sensations travel at the same speed or if there are differences based on the type of force involved and the sensory receptors engaged.

Discussion Character

  • Exploratory
  • Technical explanation
  • Debate/contested

Main Points Raised

  • One participant questions whether the physical sensation of sound and the auditory perception travel at the same speed, suggesting they might involve different forces.
  • Another participant asserts that the pressure wave felt is the same as the sound wave, implying they arrive simultaneously, with any delay being negligible due to brain processing time.
  • A different viewpoint acknowledges that while bass sounds can be felt physically, there is no known reason for them to travel faster than sound waves.
  • One participant discusses the brain's ability to perceive delays in sound arrival, particularly in the context of echolocation, noting that underwater sound travels faster than in air, complicating perception.
  • Another participant introduces a caveat, emphasizing that while certain observations about echolocation are accurate, they do not necessarily validate the conclusions drawn from them.
  • A participant lists several factors that could influence the perception of sound and pressure, including the speed of sound in air, the speed of sound in the body, nerve activation speed, and brain processing time.

Areas of Agreement / Disagreement

Participants express differing views on whether the sensations of sound and pressure travel at the same speed, with some asserting they do and others suggesting there may be differences. The discussion remains unresolved with multiple competing perspectives.

Contextual Notes

Limitations include the complexity of sensory processing, the dependence on definitions of 'speed' in different mediums, and the unresolved nature of how various factors interact in the perception of sound and pressure.

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'speed' of sound vs. 'feel' of sound? (e.g. subwoofer, tree falling, etc.)

When bass plays from a subwoofer, a tree falls, a bomb explodes or something similar there's a very real physical sensation that accompanies the sound. My mind is most curious to know if these travel at the exact same speed (being the same 'force' hitting two different sensory receptors) or if one travels quicker than the other (being two different 'forces'). Any thoughts?

p.s. if the answer is completely obvious, sorry!
 
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The force you feel is the pressure wave...and these change in pressure waves are also how we perceive sound they are the same thing. So the only delay between the two if any is the time it took you're brain to process the two different sensations which is impossibly small to measure anyway :P Unless a biologist knowledged on the brain's sensory system knows the answer.

But they arrive at same time. As they are the same thing.
 
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Well, those bass sounds with high amplitude, you could certainly feel on your clothes, skin and your bodily hair. I'm not aware of any reason why they would travel faster.
 


sirchick said:
So the only delay between the two if any is the time it took you're brain to process the two different sensations which is impossibly small to measure anyway :P
Actually - that's an excellent point. Thanks for making me correct myself.

The brain is quite capable of perceiving this delay. In fact, smaller. We are able to echo locate in part by sensing the difference in arrival of signals between our ears - only 6 inches apart.

(Anyone who swims knows that it is not possible (for a human) to echo locate underwater. An overhead boat makes a sounds seems to be coming from everywhere. This is because the speed of sound underwater is so much faster than air that our brains cannot perceive any discrepancy in arrival time.)

So yeah, a pressure wave would certainly in principle arrive with enough delay to be sensed separately.
 


interesting, thanks for the quick responses!
 


Caveat: that is not to say it is true.

All the stuff about echo location in water and air is true, but that does not make the conclusion true; it only makes the conclusion plausible.
 


IMO there are 5 things to consider here:

-The speed of sound in air
-The speed of sound in your body (i.e how much faster when it reaches the skin)
-The speed at which pressure sensing nerve cells are activated
-The speed of a signal through the nervous system (~120m/s)
-The time it takes for the brain to process the input
 

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