Headphones+(Noise-Cancelling)

=My Device= Noise Canceling Head Phones Daniel Marco Frias Legazpi

Purpose
//The purpose for noise canceling head phone is for having superior sound and cut off the sound around you that does not come form the phone.It give high quality sound at its greatest//

Energy
//The use electrical energy by being connecting to the audio device//

Controls
//Some headphone have no sensors, they just get connected and they start jamming out. Other headphones have volume control and other thing like skipping the songs.//

Materials
Noise canceling headphones are made with some of the same materials as regular headphones like the speakers, copper wiring, and plastic, but there also other materials in them. Unlike regular headphones noise canceling head phones have a microphone and specific noise canceling circuitry. The noise canceling circuitry works exactly like regular headphones in the sense that they take the output from the devise they are hooked up to and send the out put through the wires to the speakers. But instead of going directly to the speakers the transmissions pass through circuitry located next to the speakers. This circuitry is made up of 3 amplifiers 2 of which have identical circuits. What that means is that there is an amp for an amp. Having an amp for an amp means that the noise created from one can cancel out the sound of the other. To obtain this affect there is a microphone placed in the earphones which picks up the sound coming from the outside. The transmission picked up from the microphone is sent to one of the amplifiers which then plays the sound. At the same time that sound is played another amp plays the same thing but at a different starting time. The change in time is 180 degrees out of sync with the original output so there is no break in sound waves, thus creating silence. The third amp that doesn't have counter is used like a regular amp. It takes the sound and transmits it to the speakers so the person using them can hear their music.

This is a diagram of the wave frequencies.

Science
//What is scientific principle is central to its operation?//

Design
//it looks like two large speakers that cover your ears, and their connected together by a large strap and on both of the head phone, their is a one cable that splits and connect to of them to the device//

Evolution
//What changes have there been (or could there be) in this device?//

Competitors
//Speakers,wireless head phones,head phones//

Partners
//Head phones,speakers//

Siblings
//Wireless head phones,head phones,and speakers .//