Sympathetic Resonance
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- Опубликовано: 30 апр 2014
- Tuning fork demonstration of sympathetic resonance. Two adjacent tuning forks of the same frequency (440 Hz). One fork is struck and then damped. The unstruck fork continues to vibrate at the same frequency (resonant frequency) as the struck fork.
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thank you! thank you so much!
It was the easiest explanation to date!!
the best and most simple explanation. Thank you!!!
Thank you Michael. I'll embed this on a science site I manage. Excellent demonstration Sir. Liked, subscribed and will share! Bravo! 🙏🏽
Holy crap that's really cool. Thank you for the demonstration.
Thanks for this. Good job on the demo.
Great explanation. Easy to understand!
Great explanation, big thanks sir !
Thank you, Michael! :)
Thank youuu 💓
strings on my acoustic guitar do that sometimes. I'll play a sustained note on my electric guitar, ( usually an open string note)...when I suddenly stop I can hear one of the strings on the acoustic ringing out that same note.
Coool!!!
Thank u!
Kelsee, it must me the same hertz. The oxygen molecules resonate (vibrate rapidly) at whatever level, in this case 440, and agitate the fork tuned to that frequency. Other forks would not be effected.
Fantastic and concise demonstration, Michael! I had a doubt though, I noticed an interesting occurrence when playing with tuning forks. I had a similar setup, and as I struck one, the other picked up and started resonating. And here's the interesting part; as the main fork (the one that was struck) slowly faded in amplitude, and the other fork became louder. After a few seconds, this reversed; the main fork became louder, and the second started to fade. This bouncing back and forth of amplitude went on for a while before they both died down. Is there a term for this occurrence? And thank you for the video!
Can you make a video on this? I would love to see this
*Holy shit I resonated with this so well i started vibrating NO FAKIN’*
Enemy of the bass players
Hi Michael, this was so helpful, I would like to build something similar to demo this to others live. Are you willing to share with me instructions on how to build these holding boxes?
Hi Sasha - I bought those boxes back in 2014 for the purpose of teaching sympathetic resonance to a group of medical sales reps who were being taught to sell an acoustic airway clearance device for the lungs. Anyway, they are now long gone; the boxes, I mean. However, I just searched Amazon for "tuning fork resonance boxes" and was amply rewarded with a number of choices:
www.amazon.com/s?k=tuning+fork+resonance+boxes&ref=nb_sb_noss
Hope this helps you. All the best.
Hi Michael, that is super helpful. Thank you for getting back to me! 🙌
Curious. So the other tuning fork doesn't vibrate at all if you strike a tuning fork of another frequency? Wouldn't the waves affect an object next to them no matter what the frequency? Thanks! :)
It might. It would depend upon how close in frequency the two forks were. If they were very close, there may be some response. If they were very different, there may be no response at all. This demo was meant to show sympathetic resonance to help understand a medical treatment therapy, not necessarily illuminate all the facts about resonance, resonant frequency or sympathetic resonance. Thanks for the thoughtful question.
Thanks!
Yes, but to a lesser degree. The closer the first fork is to the frequency of the second fork, the more likely the second fork will vibrate "in sympathy." Ever have a car with a big ass stereo and lots of watts pull up next to you at a traffic light? And that car is booming and vibrating. And so is yours. The reason is that: (a) if you're close enough and (b) if the resonant or natural frequency of your car is the same as the other car (which is likely), your car will vibrate in sympathy with the car whose stereo is pumping out the bass. Also, notice that it happens more prominently with bass notes, rather than treble. That tells us that the resonant frequency of structures like automobiles tends to be more on the low frequency (bass) side. I did this demo to explain how an acoustic airway clearance device for pulmonary disease patients works. Gratified to see the interest. Thank you.
@@BrenzMarie I love that you answered Kelsee's question twice, and both answers gave different insight.
@@fire--fly Twice! I'm from the Department of Redundancy Department.
Question: If this works with sound waves which are longitudinal waves, why does it also work with EM waves which are transverse waves?
Great
At what distance does the effect spot working
I love music and science and math... 😍😍😍😍😍
do you get double the out put energy as the input energy? or is the sound have a lower volume on the second fork?
The amplitude of the second tuning fork is reduced in this demonstration. This is evident because the frequency of the forks is within the range of human hearing, so we are able to discern that. Ancap Zombie previously mentioned (I'm paraphrasing him) that the intensity of energy in the form of waves (sound, light, radiation, etc) behaves according to the law of inverse squares where the amplitude of the sound (in this case) varies inversely with the square of the distance away from its source. So, the amplitude of the sound that resonates the second fork will be less than the first fork, depending on the distance between the two.
so the other tuning fork turned on because they are the same frequency AND are near each other???
Basically if sound hits the fork, the fork will vibrate at that frequency. If the frequency of the sound and the frequency the fork produces aren't nearly equal (or close to an exact multiple), then the sympathetic vibration will be very small. Because sound (ignoring things like walls that reflect sound) follows the inverse-square law, the closer the 2nd fork is to the 1st, the louder the sympathetic vibration.
Does this work for all different types of material and shapes. I’ve seen this done with tuning forks, but does it work with everything else?
Michael, I have a question about the size of resonance boxes. I saw on a video somewhere that the dimensions of the box are vital to creating the effect.
Is there a way to calculate the size of the box based on the frequency of the tone generated? Is it possible for a resonance box be as large as a room and work?
I’m working on a fiction piece that will have some admittedly far-fetched ideas, but the concept of resonance will play a central role in the story, and of course there will be some creative liberties taken , but I’d like to have the science as accurate as possible. I’d like to be close enough to reality for viewers to be able to suspend their disbelief long enough to enjoy the story.
Hi Firefly - The area encompassed by your question is not one in which I have any expertise. The reason I was demonstrating sympathetic resonance was to teach some medical device salespeople the principles by which a medical acoustic airway clearance device for pulmonary patients works. However, I'll hazard a guess with respect to your question. For the little box used to demonstrate sympathetic resonance with a pair of tuning forks, the precise size is probably not relevant. However, if you were designing a high-end audio loudspeaker for superb sound reproduction and exacting performance, for example, the size and shape may well be relevant with respect to the type of speaker, type of enclosure, frequency response, amplitude and other factors. There are loudspeakers known as "bass reflex" speakers that use resonance plus other acoustic factors to optimize performance. Some of the physics relevant to bass reflex speakers may also apply to the situation you are exploring. I suggest that you start your quest for more information by looking at this web site:
hyperphysics.phy-astr.gsu.edu/hbase/Audio/basref.html
Also, perhaps you could contact someone at MISCO Speakers (www.miscospeakers.com). I cannot guarantee it, but someone there may be willing to answer your question. Good luck.
@@BrenzMarie Thanks! I appreciate you taking the time! Yes, I read one of your other comments regarding why you were doing the demonstration. Anyway, I will look into MISCO Speakers and hyperphysics - Thank you!!
how can we tune 2 items with same frequency
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Thanks so much, Michael. Is there a reason all of the tuning boxes for this appear to only be sold at 440Hz? I would think all frequencies would be available?
Cool demo!!! Or maybe it was more than a demo. Thank you.
Glad you liked it!
Hoba sent me here
I can't hear the second one!
It's there, but its amplitude (loudness) is less than the primary. Depending on one's age and exposure to noise over your lifespan, some persons might have some hearing deficit that prohibits them from hearing certain frequencies, particularly and the low and high ends of the hearing spectrum. However, 440 Hz is middle A on the piano; not very low, not very high. It might be you should turn up the volume a little bit on whatever device you're using to watch and listen to the video clip. Maybe also the speakers on the device are not accurately reproducing that sound.
@@BrenzMarie Thank you very much for your thorough reply, so kind of you! I found the explanation fascinating. I started to become interested in this concept after reading about the dangers of 5g technology. Thank you again.
use a headstand or earbuds
Is this how female periods sync? Never knew that woman had tuning forks up in there.
anyone here from physics?
Switch tuning for 'A' with a *5G* antennae calibrated for Millimeter Wave Lenght Frequency High Band transmissions (USB & LSB), switch tuning fork 'B' with a human brain, do I have to go on? . . . . 💀
Is this scientific?
Yeah, please do. Human brain is not a goddamn tuning fork ... Though yours might be, diiiing numbnuts.
Very clever opinion
@@ArthurMorgan-wx6hd Elementary, my dear Dr. Watson! . . .