that's one of the coolest things I've ever seen.... and so a question that occurs, is what does that look like pumped through a colloid? Also, thanks for the creative inspiration.
Well, depending on the density (and size) of the particles, it may not look much different. If I had to model a colloid, I would probably simply adjust the density of the fluid as a first pass.
Cool graph! As I 'm not familiar with this , I thought that sounds was a pressure wave, and a more intense sound meant a more intense pressure wave. Can you clarify how those two are different? I'm thinking intensity might also account for constructive and destructive interactions, but I'm assuming pressure wave would too
Anything over 20 kHz is termed ultrasound, which is still part of the acoustic spectrum. Just because humans can't hear it doesn't mean it isn't sound. Sound (acoustics) is simply pressure fluctuations in a medium, regardless of frquency.
Most definitely a stretch... Ultrasound Pressure/Intensity just didn't sound right, and I thought laypeople may be confused by Acoustic Pressure/Intensity. But, you still hear people in acoustics talk about "sound" as just a general pressure wave.
The sound pressure is oscillating between positive and negative values. The red in the plot is positive and the blue is negative. As this is just a steady-state representation, you can think of the red and blue changing at the rate of the excitation frequency. 1 MHz = 1 us.
Thank you for your
that's one of the coolest things I've ever seen.... and so a question that occurs, is what does that look like pumped through a colloid? Also, thanks for the creative inspiration.
Well, depending on the density (and size) of the particles, it may not look much different. If I had to model a colloid, I would probably simply adjust the density of the fluid as a first pass.
Cool graph! As I 'm not familiar with this , I thought that sounds was a pressure wave, and a more intense sound meant a more intense pressure wave. Can you clarify how those two are different? I'm thinking intensity might also account for constructive and destructive interactions, but I'm assuming pressure wave would too
Source: Newton, Euler, and many physicists, engineers, and mathematicians who followed them.
Wow, this is amazing. Thanks for sharing. Did you write a paper about this? Or you just like to play around :D
Are you simulating that patch at the top as a diaphragm, also what's the size scale
You should post this on
It’s fascinating to see the intensity peaks vs frequency (dispersions?) and side-lobing - I presume this is from an array.
It's not an array. Just a single piezoelectric driving element (slightly visible at top center).
What type of source is this? Dipole?
It's just a piezoelectric element (barely visible at the top center of the water).
It's a stretch calling anything that high in frequency sound isn't it? To be sound, doesn't it need to be audible?
Anything over 20 kHz is termed ultrasound, which is still part of the acoustic spectrum. Just because humans can't hear it doesn't mean it isn't sound. Sound (acoustics) is simply pressure fluctuations in a medium, regardless of frquency.
Most definitely a stretch... Ultrasound Pressure/Intensity just didn't sound right, and I thought laypeople may be confused by Acoustic Pressure/Intensity. But, you still hear people in acoustics talk about "sound" as just a general pressure wave.
[удалено]
See some of the other comments and replies.
Does this mean sounf pressure is actually higher at 2.6mhz than 4 mhz?
I think the peak sound pressure at 4MHz is actually higher, but very localized.
Sound pressure and megahertz? Are you measuring sound or radio waves?
Radio waves are electro-magnetic. Sound/acoustic waves are mechanical.
Somebody that uses jet color scale has quit the realm of science and entered the realm of arts 😂
Jet color scale??
Where do the sidelines come from? Nonlinearity? Von Neumann numerical instability.?
Sound disperses more the lesser the frequency.
It's not nonlinearity of numerical instability. It is simply wave dispersion and interference.
Hmm... wonder how many mhz are required for sound pressure strong enough to lift up a rock
It's more about the wave pressure amplitude than frequency, but it depends what size of rock you're asking about.
The sound pressure is oscillating between positive and negative values. The red in the plot is positive and the blue is negative. As this is just a steady-state representation, you can think of the red and blue changing at the rate of the excitation frequency. 1 MHz = 1 us.