Sound boom in US Navy Blue Angels shows

 

Sonic boom is an impulsive noise similar to thunder. It is caused by an object moving at the speed of sound -- about 343 meters per second or 767 miles per hour at sea level and at 68 degrees Fahrenheit.  

When two objects reach the same frequency, a phenomenon in physics called resonance occurs.

Resonance is a phenomenon that occurs when an object or system is subjected to an external force or vibration that matches its natural frequency. When this happens, the object or system absorbs energy from the external force and starts vibrating with a larger amplitude. https://en.wikipedia.org/wiki/Resonance?

Resonance, could happen in your daily life. For example,  you turn your faucet on slowly, gradually turn the faucet handle up, so water flows out with increased speed. At a certain point the flow speed reaches the natural frequency of the copper pipe. We could hear a laud vibration sound of the pipe. Once my landlord was at this scenario, she was scared and wanted to call a plumber, I said "turn your faucet handle either up or down, you will not hear this sound any more". She did and the vibration stopped.

In an air show, this could also happen. When the jet reach the speed of the sound, you will heard a boom (the sound boom) and you will also see a cone- shaped cloud if there is enough water vapor in the air. It happened that the days were all cloudy when all my pictures were taken.  

 

On leveled photos (3 continuous shots, 2007):

 

On a chopped, sharpened photo (2008):

On a chopped, sharpend photo (2009):

On youtube (not mine):

 

Sonic boom is an impulsive noise similar to thunder. It is caused by an object moving at the speed of sound -- about 343 meters per second or 767 miles per hour at sea level and at 68 degrees Fahrenheit.  

When two objects reach the same frequency, a phenomenon in physics called resonance occurs.

Resonance is a phenomenon that occurs when an object or system is subjected to an external force or vibration that matches its natural frequency. When this happens, the object or system absorbs energy from the external force and starts vibrating with a larger amplitude. https://en.wikipedia.org/wiki/Resonance?

Resonance, could happen in your daily life. For example,  you turn your faucet on slowly, gradually turn the faucet handle up, so water flows out with increased speed. At a certain point the flow speed reaches the natural frequency of the copper pipe. We could hear a laud vibration sound of the pipe. Once my landlord was at this scenario, she was scared and wanted to call a plumber, I said "turn your faucet handle either up or down, you will not hear this sound any more". She did and the vibration stopped.

In an air show, this could also happen. When the jet reach the speed of the sound, you will heard a boom (the sound boom) and you will also see a cone- shaped cloud if there is enough water vapor in the air. It happened that the days were all cloudy when all my pictures were taken.  

 

On leveled photos (3 continuous shots, 2007):

 

On a chopped, sharpened photo (2008):

On a chopped, sharpend photo (2009):

On youtube (not mine):

 

Thanks for sharing resonance in our daily life & an air show

"When the jet reach the speed of the sound, you will heard a

a boom. and you will also see a cone- shaped cloud if there

is enough water vapor in the air."

That sounds like fun. I will keep an eye on this phenomenon

when I go to air show next time.

精彩，不过这逆光几乎看不出是BlueAngel涂装，但轮廓肯定是FA-18F SuperHornet

It doesn't have to take sonic speed to yield/show the cone

看来是物理大牛。。

这样不是更酷嘛。有艺术感。前3张照片, 应该是文青们的茶。。

Thank you.

There is usually once in each air show,

in fact, only a momment in each air show. You have to be prepaired. 

You could either take a photo or a movie. You have to prepair for the exact size of your pictures. Mine were either too big (2007) or too small (2008, 2009).

 

Is it true that resonance could bust bridges?

谢谢，since this happened many years ago.

Also watch that youtube video, catch the moment and

the sound, one of them might be on the site of your air show.

It is better to have at least two person: one for photo, the other for movie.

After the shots, a movie frame could also be a good picture as long as the resolution is high.

Yes. There is a case,

in wiki:

https://en.wikipedia.org/wiki/Angers_Bridge

 

fascinating!

Sound barrier In wikipedia,

https://en.wikipedia.org/wiki/Sound_barrier

 

Imagine Chuck Yeager's nerve breaking the sound barrier.

Thanks for the tips.

But I doubt. If it happens in this case, I could watch and

hear this many times, but in reality I could hear and watch this only once in an airshow. Watch that youtube video, it happend only once.

It could happen at any Mach.

Thanks for sharing such daily-life application of resonance

So cool :)

You are welcome. Tuning a radio station is also a resonance.

I ask Bard, tuning a radio station, is it a phenomenon of resonance.

Bard answer:

Yes, tuning a radio station is a phenomenon of resonance. Resonance is a phenomenon in which an object or system absorbs or emits more energy at a certain frequency than it does at other frequencies. This is because the object's or system's natural frequency matches the frequency of the incoming energy.

Radio stations broadcast their signals at specific frequencies. When you tune your radio to a particular station, you are adjusting the resonant frequency of the radio's receiver circuit so that it matches the frequency of the radio station's signal. This allows the radio to receive the signal from the radio station and reject signals from other radio stations.

Radio receivers typically use an LC circuit to tune to a specific frequency. An LC circuit is a circuit that consists of an inductor (L) and a capacitor (C). The resonant frequency of an LC circuit is given by the following equation:

f_r = 1 / (2 * pi * sqrt(L * C))

where:

f_r is the resonant frequency in hertz (Hz) L is the inductance in henrys (H) C is the capacitance in farads (F)

By adjusting the inductance or capacitance of the LC circuit, the resonant frequency of the circuit can be changed. This is how radio receivers are able to tune to different radio stations.

As another example, a bridge collapsed in 1850, was also a resonance event:

https://en.wikipedia.org/wiki/Angers_Bridge

9 Everyday Examples Of Resonance:

https://studiousguy.com/everyday-examples-of-resonance/

Thank you.

All I am saying is that

Vapor cone can happen before sonic speed.  It is probably most obvious when breaking the sound barrier where pressure in the wave front changes most dramaticly

 

I agree that could happen. But that might not be called as

But sound boom has two components

1. A dull sound, you could hear.

2. A cone shaped dome when there are enough water vapers in the air.