Is it Possible to Make Hypersonic sound? Ultrasonic Sound Lasers and Lenses 

Lmfaooo

did you just sansified 🅱️eter?

AKA echo

Wowo nice

Lol

yep. 100% better than normal school lessons. he teaches relatively effortlessly to make it interesting simply due to the fact that he always manages to find interesting things to make a video about. he is definitely creative with his video ideas.

After watching this channel I like science more than ever did. this channel is filled with fun experiment and easy knowledge i like your channel and I am your big fan I am from India 🇮🇳😇

Fax

Some of his explanations are a bit inaccurate/misleading though. For example, the refractive difference between mediums isn't actually due to density, although they are related. And the same goes for sound through a medium. Additionally, when he explained how the "sound beam" works, he said it uses pressure waves to propagate, but that's what literally ALL sound is, it's not special to this. And the generator of the waves is absolutely the source of said sound. The source of the waves IS the source of the sound. All waves need a source, and sound is no exception. It doesn't just materialize from the aether.

your teacher is there for money, this guy right here ? he is here for looove :D

Joery Van Damme precies nl 😂🇳🇱

yeah...

well duh

@@Thomasjochen haha yup, allez Belgische :p

lmao

The sound of silence

Silence is not that quiet. It already makes sounds. That ya can't hear...

Yes. Just fart in your classroom while teacher is teaching. Everyone will make sound.

@@vijeykrishnaa2230 great song

@@ThePrufessa I love it too

@Gabriel Prado *am a joke to u*

*Letter a: am I a joke to u?*

@JL_Vasix ?: Am I a joke to you?

Gabriel Prado you forgot “I” but you used i instead...

A: am i a joke to you

that's amazing! like thunder and lightning!

@@HelloKittyFanMan. In German, you capitalize some letters.

@@HelloKittyFanMan. Talk to me when ur smart. Like wtf, are you dumb? Talk when u know German, I'm surprised of how low your iq is

@@samitannir6830 you litteraly didn't explain anyrhing

@@HelloKittyFanMan. What's your Problem?? It just looks better - better Visibility -and Yes I am German you little Grammar Nazi!

I remember too

How are you so early?!

Ogey masta, lezz kill da ho, beeeeeeeeetchy,, ,

Are you god? You are omnipresent!!

Bots but this guy is the real one

@Justin Y. Do you live on the internet?

Yes

in the seventies (unfortunately I cannot find the article anymore)

it will but only through vibrations that comes from the part of the mic that is touching the bottom of the chamber.

In the vacuum of space... no one can hear you scream.

@RILEY RODRIGUEZ oook

however wearing a tinfoil hat would do absolutely nothing to stop it

Sonoluminescence.

Not even Wikipedia knows why.

en.wikipedia.org/wiki/Sonoluminescence

Is light produced or is it for nanosecond refractions from bubble collapsing..? How would u measure input of light into/onto bubble..isolating it from environment.. or is it photons being emitted from electrons of atoms of material in the water excited by sound..im not sure if this is possible?? Would salt water be same as fresh water in this case? 😘

Matías thanks for the link..it's very helpful..I'd not heard of this before!!

Yes but I think water is so dense that some sound gets caught along the way

A horn speaker confines the radiation angle of sound, but the dimensions of the horn mouth must be large enough relative to the wavelength to exert pattern control and not just create edge diffraction. Think of a straight pipe having the diameter of the sound source: if you use a small source (such as 1"), most audible frequencies will diffract when they reach the end of the tube, because of the sudden change in radiation resistance (forcing the wave to expand in directions not parallel to the horn wall), and the effective radiation angle will be close to 180 or even 360 degrees in any plane crossing the axis. To constrain the radiation angle to smaller angles while having a mouth that opens to be large enough to control the radiation angle, the horn will need to be exceptionally long, even infinitely long. If you make the sound source tens or hundreds of times larger than the wavelength it is producing, then it will begin to exhibit off-axis self-interference, which becomes more intense as the dimensions of the isophase source (think of a flat piston) are increased, producing coherent summation only in the axis of radiation with minimal spreading, but these sources can become impractically large to transport or mount. (Look at the Meyer Sound SB-3 "sound beam" - it is an array of dome tweeters creating a sound source that is substantially planar, substantially continuous, and substantially isophase.) An array of ultrasonic transducers is able to create narrower beams of sound than a horn can produce, and because even a radiator of practical size becomes large relative to the wavelengths of ultrasound that it is producing, it is able to make use of off-axis self-interference to create a narrow beam at distance. Because ultrasound is being produced, it cannot be heard. It needs to contain modulation content that occurs at audible frequencies in order to be perceived by the ear. So the ultrasound needs to be demodulated somehow, and it does that by interacting with a high impedance surface, causing the ultrasound energy to be reflected in a non-isophase manner and mostly destroyed, but the residual variation in pressure is demodulated as audible sound. In a Class-D amplifier, this is done electrically by passing the modulated ultrasound signal through a reconstruction low-pass filter, but in the physical domain anything providing a reactive low-pass effect can demodulate the ultrasonic carrier, causing the resultant pressure to contain only audible content below the low-pass corner. Once the concept of demodulation is understood, a number of methods for achieving audible transmission become apparent. You can employ frequency modulation (resulting in amplitude modulation of another ultrasonic difference tone between a steady ultrasonic carrier tone and a sliding ultrasonic carrier tone as the carrier), amplitude modulation, or pulse-width modulation. You can use mechanically transmitted pressure waves, or you can use other forms of energy to do this also - radio frequency, microwave frequency, or even light, though the power needed to produce air movement can be great enough to cause injury to a subject, so you would need to be careful. This power, modulated at audible frequencies so the demodulated signal consists only of audible content, can be used to produce audible sound. This phenomenon of energy demodulation is likely what caused American diplomats in Cuba to perceive harsh-sounding audio as they awoke inside their domiciles while their brains were being damaged using a directed energy weapon, causing people in the public to suspect that an "acoustic weapon" was at work; in reality, sound (acoustic pressure waves) would not be able to pass through the walls of their living quarters without being strongly attenuated, but radio frequency energy can pass through walls, and if its modulation contains audible content, then the person or animal subject will experience audio while the rest of the energy is being dissipated in their body in another way (such as frying their brain).

@@Acoustic_Theory *w h a t*

Conspiracy fact: This technology has been used a lot during the 80-90s to induce panick within large crowd gatherings. It was allegedly used to put down a comunist leader...

Yes I saw some TV program around a decade ago about the military using this technology as a non-lethal deterrent and for crowd control.

@Ian M even quantum effects are more predictable ^^ They are a failure in the Matrix

Could be a Mandela effect.

How should this work? Mix some kind of extremely flamable oil in?

Just mix ethanol with water boom flammable 'water' which is mostly water

@@deadalpeca8099 it would be over 40% ethanol I dont think almost 50/50 is considered as mostly water

Just to be clear, your notation should be using a subscript for the 2, otherwise it's an ion.

Mr.Knight The Detective: en.wikipedia.org/wiki/Chlorine_trifluoride

Weird