Sun|Trek Adventures Solar Surface Hot Solar Atmosphere Magnetic Sun Flowing from the Sun
Sun Earth Connection Solar Spacecraft Earth and Beyond The Sun as a Star
  solar surface & below
Beneath the surface On the surface
Sunspots Suns magnetic field
Sunspots Energy Chain
Up Arrow
  dive beneath the solar surface
Down Arrow
  sounds galore
  why does the Sun ring?
  detecting the Sun's vibrations
  different solar tunes
  the speed of sound in the Sun
  the temperature of the Sun
  how fast does the Sun rotate?

sounds galore

 

Here are three sounds. You can probably recognise the sound without actually seeing what is causing it.

 

Click on the picture of the ‘musical note’ and listen to the sound. Put your mouse over the blue circle above the note to see if you have guessed the sound correctly.

         

In helioseismology, we are searching for tiny differences in the Sun's vibrations or sound waves.

  Answers Box  
Exclamation Mark
Exclamation Mark
Exclamation Mark
         
   
Exclamation Mark
 
Exclamation Mark
     
 
 

Comparing these tiny differences is something like trying to hear the difference between a guitar and a harp. Actually it's a lot harder than that - more like trying to tell the difference between two different makes of guitar.

     

How does sound travel?
When sound waves travel through air, the atoms and molecules of nitrogen, oxygen and other gases which make up our atmosphere bang into one another and pass some of their energy to their neighbours. In this way, waves of energy (sound waves) can travel at a speed of about 340 m/s in the Earth's atmosphere.

 

Native Amercian Indians would hear the sound of an approaching buffalo sooner if they listened to the ground rather than waited for the sound to reach them by air.

 

What do you call a dwarf who travels by underground? - A metronome!

Sound can also travel through liquids and solids. In fact it travels faster through liquids and solids than it does through gases. Without the molecules in the air, solid or liquid, the sound can't travel. In a vacuum, there is silence.

       

A small hand bell produces a high-pitched sound, whereas a very large church bell produces a deep low-pitched sound. The bell vibrates when it is struck by the little hammer inside it. The bell is said to 'resonate'. Click on the images and listen for yourself...

 
 
 

What are 'Pitch' and 'Frequency'?
Large objects vibrate slowly and only produce a few waves each second. They produce waves with a low frequency. These are low-pitched sounds.

Small objects vibrate quickly and produce lots of waves each second. These sound waves have a high frequency. These are high-pitched sounds. You can find out more about different sounds and waves from visiting the Solar Waves pages.

   

 

   
 
 

Sun|trek homepage | Sun|trek Adventures | Solar Surface & Below | Hot Solar Atmosphere | Magnetic Sun | Flowing From The Sun

Sun/Earth Connection | Solar Spacecraft | Earth & Beyond | The Sun our Star | Factary | Gallery | Hot News | Contact Us