Hi,
The speed of sound is the same for any sound frequency, be it 40 or 4000 cycles,
Sound itself Is neather 'fast' or 'slow'
however, the 40hz tone is vibrating at 40 cycles per second where as the 4000hz tone is vibrating at 4000. This means the 40hz cycle is 'slower' and the 4000hz 'faster'.
Sound is pressure waves in air. the air moves and returns to origon for each complete cycle.
therefore, if you have a space, where the volume is equal for both the 40 hz and the 4000hz tone. both. are vibrating the Same Amount of air. the same Volume of Air.
the higher frequany is vibrating it faster, the lower frequancy is vibrating it slower.
with the longer wave length more air is actully Moved as the wavelength is greater. but the same Volume of air is still being moved. I will try to think how to actually explain this.
say we have two tones that are filling the same volume of space and therefore are the same volume. one is 4000hz one is 40hz.
The same amount of air is being moved.
The speed of sound is the same for any sound frequency, be it 40 or 4000 cycles,
Sound itself Is neather 'fast' or 'slow'
however, the 40hz tone is vibrating at 40 cycles per second where as the 4000hz tone is vibrating at 4000. This means the 40hz cycle is 'slower' and the 4000hz 'faster'.
Sound is pressure waves in air. the air moves and returns to origon for each complete cycle.
therefore, if you have a space, where the volume is equal for both the 40 hz and the 4000hz tone. both. are vibrating the Same Amount of air. the same Volume of Air.
the higher frequany is vibrating it faster, the lower frequancy is vibrating it slower.
with the longer wave length more air is actully Moved as the wavelength is greater. but the same Volume of air is still being moved. I will try to think how to actually explain this.
say we have two tones that are filling the same volume of space and therefore are the same volume. one is 4000hz one is 40hz.
The same amount of air is being moved.
Physics is Fun! 😀 Perhaps we should be talking about particle displacement rather than volume of air displaced.
A vibrating speaker cone makes the air particles next to it vibrate back and forwards. These particles then move the particles next to them so that the vibrational energy travels through the air as a sound wave.
The particle displacement is the distance a particle moves back and forwards around its usual position.
Sound pressure is directly related to particle velocity* which is proportional to the product of particle displacement and frequency of vibration.
From the above I deduce that the high frequency, small particle displacement of a tweeter can result in the same sound pressure level as the low frequency, large particle displacement of a woofer.
*Don't confuse particle velocity with the speed at which the sound wave travels through the air.
It's all physics, but it doesn't necessarily make sense - and I may actually be talking nonsense!
A vibrating speaker cone makes the air particles next to it vibrate back and forwards. These particles then move the particles next to them so that the vibrational energy travels through the air as a sound wave.
The particle displacement is the distance a particle moves back and forwards around its usual position.
Sound pressure is directly related to particle velocity* which is proportional to the product of particle displacement and frequency of vibration.
From the above I deduce that the high frequency, small particle displacement of a tweeter can result in the same sound pressure level as the low frequency, large particle displacement of a woofer.
*Don't confuse particle velocity with the speed at which the sound wave travels through the air.
It's all physics, but it doesn't necessarily make sense - and I may actually be talking nonsense!
I dont think you are, you explained what I ment about the speed of sound being the same but the wave lengths being 'slower' by defining how the waves form
I was writing this, Im not finding it easy to explain what I mean concicely..
lets say we go to the swimming pool. we have a small board to represent the tweeter playing 4000hz and a board reletively bigger for the 40hz ..im not sure exactly How much bigger that would be and im to lazy to work it out, but it would be a fair size bigger.
now lets say we get the small board and we create waves. we get to create 4000 of them in the same amount of time and water as the big board only gets to make 40
for this example. and to make it more practical lets use 4hz and 8 hz.
for 8hz we get to make 8 waves in a second. for 4hz we get to only make 4 waves in a second. the 4 hz waves may get to be bigger but there are half the amount and the same body of water has moved for both.
haha
I was writing this, Im not finding it easy to explain what I mean concicely..
lets say we go to the swimming pool. we have a small board to represent the tweeter playing 4000hz and a board reletively bigger for the 40hz ..im not sure exactly How much bigger that would be and im to lazy to work it out, but it would be a fair size bigger.
now lets say we get the small board and we create waves. we get to create 4000 of them in the same amount of time and water as the big board only gets to make 40
for this example. and to make it more practical lets use 4hz and 8 hz.
for 8hz we get to make 8 waves in a second. for 4hz we get to only make 4 waves in a second. the 4 hz waves may get to be bigger but there are half the amount and the same body of water has moved for both.
haha
Haha well some times I find it difficalt to explain things in words.
like how it is that a sub moves more air but is moving the same amount of air. its abit like breathing I suppose one long breath of 4 shorter breaths - same amount of air
however making a low tone on a flute does take more air than making a high tone...
my origional intention was to prove more air is moved with a longer wavelength, how did I get here, heading back to the pipe organ example, more air is used to exchite the wave in the bigger pipes than the smaller ones. but each flute is sounding at the same volume. May have to take my hat off to the Physicist here on this one.
like how it is that a sub moves more air but is moving the same amount of air. its abit like breathing I suppose one long breath of 4 shorter breaths - same amount of air
however making a low tone on a flute does take more air than making a high tone...
my origional intention was to prove more air is moved with a longer wavelength, how did I get here, heading back to the pipe organ example, more air is used to exchite the wave in the bigger pipes than the smaller ones. but each flute is sounding at the same volume. May have to take my hat off to the Physicist here on this one.
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Me too!
As the late Eric Morecambe might have said - "I am speaking all the right words, but not necessarily in the right order."
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