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What is use of megnetic force in speaker?
The magnetic force in a speaker is used to drive the motion of the speaker cone. When an audio signal passes through a coil of wire (voice coil) attached to the speaker cone, it creates a magnetic field that interacts with the permanent magnet in the speaker. This interaction results in the movement of the speaker cone, producing sound waves.
Where are the electromagnets in a loudspeaker?
Electromagnets are not used in commercially available loudspeakers due to unlinear sound reproduction, noise induced by the electromagnet current and cost. A permanent magnet with a moving coil in the magnet gap is far superior to an electromagnet considering these three parameters.
A spinning coil of wire is what moves the cone in a speaker?
When an electric current is passed through the coil of wire in a speaker, it creates a magnetic field that interacts with a permanent magnet. This interaction causes the coil to move back and forth, which in turn moves the cone of the speaker and produces sound waves.
How does the loudspeaker cone produce a sound?
When an electrical current passes through the voice coil attached to the cone, it creates a varying magnetic field that interacts with a fixed magnet. This interaction causes the voice coil (and thus the cone) to move back and forth rapidly, which pushes air molecules and produces sound waves that we hear as sound.
Why does a speaker need an electromagnet not a permanent magnet?
One of the main kinds of speakers needs both. Sound in the form of varying electricity is fed through part of the speaker known as the 'voice coil' which is actually just an electromagnet. Since the electricity in it is varying the magnetism produced by this coil varies too. The voice coil is placed close to a permanent magnet and the voice coil is permitted to move back and forth in response to the electricity going through it. A big cone is fastened to the voice coil to transmit the movements of the voice coil to the air more efficiently. Thus overall the permanent magnet and the electromagnet work together to produce the sound waves that we hear from a speaker. For a more detailed explanation go to the How Stuff Works web site and search for speaker.
How does the voice coil interacts with the magnet on the very bottom of the speaker?
The magnet is permanent, and the voice coil magnetism alternates with the current, pushing the cone outward against the magnet or pulling it inward towards the magnet as the current changes direction.
How do speaker use electromagnet?
Sound is made by pushing air with the cone. A coil of wire is attached to the cone. The "sound"current is passed through the coil. Any current running through magnetic flux causes the coil and cone to move. The larger the magnet the louder the sound. A strong permanent magnet is used. Electromagnets are not used, however
Do speakers use electromagnets?
Sound is made by pushing air with the cone. A coil of wire is attached to the cone. The "sound"current is passed through the coil. Any current running through magnetic flux causes the coil and cone to move. The larger the magnet the louder the sound. A strong permanent magnet is used. Electromagnets are not used, however
What does the coil do in a microphone?
The coil is basically an electro magnet which is used to move the cone or diaphragm in the headphone. It works like this.... Next to the coil is a permanent magnet, when the currant from your ipod or audio device travels up the cable and into the coil it makes the coil repel the magnet and that in turn moves the diaphragm to produce the sound
Why do speaker have magnet?
The magnet is part of the 'motor' of the sub. The coil inside the magnet has alternating current running through it. The coil acts as an electromagnet and pulls itself up or pushes itself down moving the cone of the speaker. The bigger the magnet, the stronger the magnetic field inside the speaker where the coil is.
How does a television make sound?
An eletrical signal goes through a coil of copper wire. in side the coil is a magnet and the eletrical energy moves the magnet which is connected to a sound cone. the soun cone move back and forth to create sound waves in the air.
What is the role of a magnet in woofers?
The voice coil of a loudspeaker is placed in an annular space within the magnet assembly and is connected to the loudspeaker's paper cone. An audio signal creates a current in the coil and this generates a magnetic field around the coil which reacts with the permanent magnet of the woofer. The coil and cone move in and out like a piston in a car engine depending on the polarity of the audio signal. This is called the 'Motor effect' and is basically a linear motor.
What is the part of a loudspeaker that vibrates to make sound?
a speaker uses a voice coil a coil copper wire and a magnet and pole to vibrate a cone
How does a field coil speaker work?
A: A speaker has a magnet and the wire is suspended in a zone by a cone whereby +/- current will make the coil move up or down moving the coil and moving the cone causing air displacement as waves of pressure that our ears can detect as sounds in our brains.
Why are magnet used in speaker loudspeaker?
the current flows to the voice coil, and at first the polarity of the current is the same as that of the speaker magnet, causing the voice coil to be pushed away from the magnet pushing the cone outward. then as the current cycles through it becomes opposite from the magnet cauing the voicecoil and cone to be pulled back in
How loudspeakers function by using basic principles of electromagnetism?
Loadspeakers function by use of eletromagnetism by combining a permanent magnet with a coil of wire in close proximity to each other. Current in the coil causes a magnetic field which interacts with the magnet to produce force which causes the coil to move. Since the coil is mechanically coupled to the cone, the cone also moves and causes air molecules to move as well. When the current fluctuates, the cone also fluctuates, translating the fluctuating current into sound waves.
What has magnet got to do with musical equipment?
It is the medium by which a voice coil reacts to or is stimulated by. Reacts: As in a speaker the power sent to the coil creates an attraction creating movement of the cone that produces sound. stimulated : As in a microphone the voice coil is vibrated around a magnet which produces electricity that is amplified to be heard.
