Hemanth

This is what I thought ... you can use I2R= Q , where Q is the amount of heat supplied per unit time to melt the nichrome wire , R is the resistance of the wire (you can measure it using a digital multimeter ) from this you can calculate the 'I' and using Ohm's law you can calculate the required voltage . since you need the wire to be red hot the heat supplied should be less than the heat required to melt it ..., so any voltage little less than the calculated one may get you the job done....

This what I have understood(please do correct me if I am wrong)...whenever we make magnetic field strong, eddy current induced will also be strong..so it tries to halt the transducer making it stiffer or almost no motion ..but what if we tap out that current as soon as it is generated like in Van de Graaff generator and store it in capacitor....?? Thank you for your reply I was able to refine my idea....

OK got it...... ,can we couple this with electromagnetic induction ....? ,because with strong magnetic field even a small movement of diaphragm(in magnetic field) would produce large current ... please do suggest if there are any other ways to tap out sound energy in an effective way...

thank you for you reply....... may be we can use it in cities where noise pollution is high(at least to light up street light) ..

Hello every one ........ this is my first post and I just wanted to share an idea... can we generate electricity from sound energy...??like making the speaker work in the opposite way.... thank you...