Design Instrument Music

Doppler found this effect by experiment use of sound such as on train sound. This sound actually have different hear by different people in many location or in different distance from this train. Doppler than want to know what happen on this phenomenon.

The Doppler effect was named after Johann Christian Doppler (1803-1853). This Austrian physicist observed and explained the changes in pitch and frequency of sound and light waves, as well as all other types of waves, caused by the motion of moving bodies. The general rule of the Doppler effect is that the wave frequencies of moving bodies rise as they travel toward an observer and fall as they recede from the point of observation.

While Doppler, in 1842, demonstrated the phenomenon named after him in the area of sound waves, in the same year he also predicted that light waves could be shown to exhibit the same response to the movement of bodies similar to those of sound waves.

This effect of sound actually applies in the bridge building technology that is used of wire to holding this bridge. The bridge building like this also many build to cross the wide river and cross the sea. They key on this building should intense to the frequency of wave that merge on the bridge.
The principle rule of frequency that is merged in the wire can strengthen or weaken each other. On wrong design the frequency can strengthen each other and can make the bridge break. If the frequency of each wire then weaken each other than make the wave on the bridge will vanish and the bridge safe. This theory also apply to the guitar and piano, this principle should be applied on designing of flute, drum, guitar, lute, lyre, lyra, violin, clarinet, saxophone and harp.

Don't Forget Lyric By Demi Lovato

Don’t Forget Lyric song by Demi Lovato

Did you forget that I was Even alive
Did you forget everything we ever had
Did you forget, did you forget about me

Did you regret ever standing by my side
Did you forget we were feeling inside
Now I’m left to forget about us

But somewhere we went wrong
We were once so strong
Our love is like a song, you can’t forget it

So now I guess this is where we have to stand
Did you regret ever holding my hand
Never again, please don’t forget, don’t forget

We had it all, we were just about to fall
Even more in love, than we were before
I won’t forget, I won’t forget about us

But somewhere we went wrong
We were once so strong
Our love is like a song you can’t forget it

Somewhere we went wrong
We were once so strong
Our love is like a song, you can’t forget it at all

And at last all the picture have been burned
And all the past is just a lesson that we’ve learned
I won’t forget, please don’t forget us

Somewhere we went wrong
Our love is like a song but you won’t sing along
You’ve forgotten about us
Don’t forget