- #1
viks505
- 8
- 0
Well I have tried a different approach to make speakers.
Normally speakers contain permanent magnets for producing sound using the property of electromagnetism when electric signals are passed through a coil kept in the magnetic field of Permanent Magnet. (ref: How Speakers Work frm How Stuff works).
now what i have tried to do here is replaced the permanent magnet of the speaker with an electromagnet.
keeping the principal of speaker in mind i hav even left the minor air gap between the core and coil (of electromagnet) for letting the coil with electric signals vibrate in the influence of magnetic field producing sound.
the basic idea while performing this was to reduce the weight of speaker along with obtaining difference in sound just by changing the strength of electromagnet.
i hav used a soft iron rod of 0.75" dia., 28 awg enameled copper wire, 12 V 500 mAh DC power supply for electromagnet.
the problem being faced here is i am unable to get the similar strength of electromagnet as that of Permanent magnet of the speaker. though i have achieved the sound objective but volume remains very low.
even increase in no. of turns of the coil and changing source to 12 V 3 Amps DC has not solved the problem.
what am i missing, should i go for any different approach in order to increase the field and sound volume
Normally speakers contain permanent magnets for producing sound using the property of electromagnetism when electric signals are passed through a coil kept in the magnetic field of Permanent Magnet. (ref: How Speakers Work frm How Stuff works).
now what i have tried to do here is replaced the permanent magnet of the speaker with an electromagnet.
keeping the principal of speaker in mind i hav even left the minor air gap between the core and coil (of electromagnet) for letting the coil with electric signals vibrate in the influence of magnetic field producing sound.
the basic idea while performing this was to reduce the weight of speaker along with obtaining difference in sound just by changing the strength of electromagnet.
i hav used a soft iron rod of 0.75" dia., 28 awg enameled copper wire, 12 V 500 mAh DC power supply for electromagnet.
the problem being faced here is i am unable to get the similar strength of electromagnet as that of Permanent magnet of the speaker. though i have achieved the sound objective but volume remains very low.
even increase in no. of turns of the coil and changing source to 12 V 3 Amps DC has not solved the problem.
what am i missing, should i go for any different approach in order to increase the field and sound volume