Toe Womens Slipppers String Walking Slide Sandals Heel Platform Peep Slip Dress Silvery on T High Fashion JULY Wedge Diamond 8wRT4Aq5 Toe Womens Slipppers String Walking Slide Sandals Heel Platform Peep Slip Dress Silvery on T High Fashion JULY Wedge Diamond 8wRT4Aq5 Toe Womens Slipppers String Walking Slide Sandals Heel Platform Peep Slip Dress Silvery on T High Fashion JULY Wedge Diamond 8wRT4Aq5 Toe Womens Slipppers String Walking Slide Sandals Heel Platform Peep Slip Dress Silvery on T High Fashion JULY Wedge Diamond 8wRT4Aq5


Dress String JULY Silvery Sandals T Slip Slide Wedge Slipppers Toe Fashion Platform Womens Peep Heel High on Walking Diamond

Speakers come in all shapes and sizes, enabling you to listen to music on your iPod, enjoy a film at the cinema or hear a friend’s voice over the phone.

In order to translate an electrical signal into an audible sound, speakers contain an electromagnet: a metal coil which creates a magnetic field when an electric current flows through it. This coil behaves much like a normal (permanent) magnet, with one particularly handy property: reversing the direction of the current in the coil flips the poles of the magnet.

Inside a speaker, an electromagnet is placed in front of a permanent magnet. The permanent magnet is fixed firmly into position whereas the electromagnet is mobile. As pulses of electricity pass through the coil of the electromagnet, the direction of its magnetic field is rapidly changed. This means that it is in turn attracted to and repelled from the permanent magnet, vibrating back and forth.

High Heel Sandals Platform Slip Toe Diamond Peep String Fashion T Slipppers on Silvery Walking Slide Dress JULY Womens Wedge
The electromagnet is attached to a cone made of a flexible material such as paper or plastic which amplifies these vibrations, pumping sound waves into the surrounding air and towards your ears.


Inside a speaker:
1. Cone
2. Electromagnet (coil)
3. Permanent magnet


 

The frequency of the vibrations governs the pitch of the sound produced, and their amplitude affects the volume – turn your stereo up high enough and you might even be able to see the diaphragm covering the cone move.

To reproduce all the different frequencies of sound in a piece of music faithfully, top quality speakers typically use different sized cones dedicated to high, medium and low frequencies.

A microphone uses the same mechanism as a speaker in reverse to convert sound into an electrical signal. In fact, you can even use a pair of headphones as a microphone!

Find related websites on music with physics.org

See a demonstration of how a speaker responds to an electric current
Heel Walking String Slide JULY Slipppers Sandals High Silvery Wedge Peep Womens Platform Dress Slip on Fashion T Toe Diamond Embedded youtube video

Collar Black BalaMasa Heighten Ladies Leather Inside Fur Buckle Imitated Boots zw7FrwEfq

The folowing links are external



Slipppers Dress High Peep T Sandals Slip Diamond Walking Slide Toe Silvery Wedge String JULY Platform Fashion on Womens Heel Heel Slip Walking Womens High Dress Diamond T Wedge Silvery Platform Slipppers Peep Slide JULY on Sandals Fashion Toe String