Requirements of A sound machine
If you wanted to make a machine that could produce every possible sound, it would need to be able to vibrate.
In order to be able to make all of the sounds that a human can hear, the machine would need to vibrate at a frequency of up to 20,000Hz.
What is a solenoid?
1.A solenoid consists of two time of magnet and electric and one of the magnetic is, magnetic field similar to that of a bar magnet. Such coils, called solenoids.
2. A solenoid can move.
3.You control a solenoid by turning it “on” or “of”.
Making a solenoid vibrate
1.If you repeatedly turned a solenoid off quickly, it would vibrate.
2.The faster you turned it on or off, the faster that the work by vibration.
3.When your phone plays music, what kind of electrical signal does it send you headphones? The music goes to the headphone “on” and “off”.
What are headphones?
Based on your answer above, what are headphones, actually? Headphone is what we use for listen to music.
Anaignacio 