How  We Can  Convert  Sound  Energy  into electrical  energy?
545913
Can sound energy be converted into electrical energy?\nCertain kinds of microphones convert sound into energy, but at very \nlow efficiency, since again it is the signal that interests us, not\nthe energy. Other kinds of microphones, which modulate a current and\ndo not produce energy, work just as well for this purpose.\nI have not heard of any system developed to convert sound into elec-\ntrical energy efficiently and I do not think it is worthwhile to de-\nvelop one, since the amounts of energy available in the form of sound\nare rather small, even if it appears very loud to your ears (see\nbelow).\n\n>  ii)if yes....how?\nBy moving an electric conductor (e.g. a wire) through a magnetic\nfield, some of the kinetic energy is converted to electricity and a\nvoltage is induced in the conductor. Some kinds of microphones use\nthis effect by having a wire coil excited by sound (waves of moving\nair particles) in the field of a build-in magnet. The resulting\nvoltages are very small and need to be amplified to be usable.\n\n> bi)how to store the converted electrical energy?\nIt is not worthwhile to store such tiny amounts of energy. Normally\none is only interested in storing the information contained in the\nsignal (e.g. voice recording), but that costs a lot more energy than\nthe captured sound originally had.\nIf you are 20m from the 40kW-speakers of a heavy metal concert, you\neasily become deaf. Yet if you have a 1m x 1m device that converts\nall incoming sound energy at 100% efficiency, you would get 10W of\nelectrical power - a tenth of what an ordinary light bulb needs.\nMicrophones have less than 1% efficiency and are much smaller ...\n\n>  ii)in a chip ?\nChips are not a medium of choice to store energy. See above.\n\n> 3)Is their anything that is very /extremely sensitive to sound?\nMicrophones, human (and other) ears.\n\nPlease let me know if you need further clarifications.
71953
Or you can make a dynamic mike with a strip of tinfoil suspended between the poles of a strong magnet; only puts out a few millivolts so needs lots of amplification.  Or use the old telephone mike technique, a bunch of carbon particles pressed lightly together in an insulating case with metal end caps; this behaves like a variable resistance so you need to connect it to a DC source and amplify the voltage changes across it.  Or you could get really ambitious and make a condenser mike; but this one's extra tricky to implement since you need two parallel metal plates, one rigid and the other foil; bias them with a high voltage from a high impedance source, amplify the output.
76279
dont see why not. just some simple energy conversions. theoretically it would work, but maybe slow down due to energy lost as heat due to friction and such... but it should work.
941286
if it is only in your room there must be a source\nto find it all you have to do is plug one ear - place a tube on the other ( thick cardboard like wrapping paper comes on ) and slowly move around the room - the direction will be obvious - start with the window it could be a nearby power transformer ( if the source is in the wall check the other side before tearing into it - sound is not directional if you don't hear it on both sides it is probably near the wall not in it - like the floor or ceiling at the wall joint )
703678
Two techniques: analog and digital.\nAnalog: the sound is a variation of air pressure.  This variation is "measured" by a microphone (or similar), to convert the pressure differences into variations of voltage.\nThis voltage variation is then used, after amplification, to act upon a "stylus" (in the case of Edison) that "vibrate" on a cylinder of soft wax, animated by a rotation and a horizontal translation.  The variations of the stylus can be read afterwards by retarting the process, this time fromt the stylus to a speaker.\nLater, the voltage variations where converted in magnetic variations that were "written" to a wire first, then to a tape (tape recorders).\nNowadays, the same voltage variations are "sliced" and measured many times per second, converted in numeric value, and it is the number that is recorded on some disc or solid state memory: this is the digital recording.
559788
The easiest form of energy to produce is thermal energy.   It's produced accidentally from almost every other type of energy.   When electricity flows through a wire, some of it is dissipated as heat because of electrical resistance.   When the wind blows past your house, some of its kinetic energy is dissipated as heat.   The reason a sound dies away is because it goes to heat up the air.   If you shine a light on a dark surface it is absorbed and turned into heat energy.   This is because heat is the most disordered form of energy.   Turning heat into other forms of energy is more difficult.   You need some sort of machine like a petrol engine, steam engine or rocket motor.   This is the second law of thermodynamics; entropy (disorder) increases.
1174999
It'd be pretty complicated, but one way might be...\n\nUse the radio waves to heat something.  Connect a heat engine between the warmed object and one at room temperature.  Use the heat engine to run a generator.  Use the generator to charge a battery, and then connect the battery to a light bulb (or laser, or some other thing that emits visible light).  Voila!\n\nAnother way you might be considering is something analogous to frequency doubling-- shine laser light of some wavelength on a crystal, and out from the other end comes laser light with double (or sometimes triple) the frequency.  This won't work with radio waves because they simply don't have enough energy.  Frequency doubling works because of nonlinear effects that take place in the crystal.  Radio waves are not energetic enough to produce nonlinear effects.
28195
Electricity is a form of energy.\n\nIt can be generated from other forms of energy, for example, chemical energy (burning fuel, or a battery), mechanical energy (a windmill), nuclear energy (atomic fission reaction like in a power plant).\n\nIn a battery electrical energy is converted from the  potential energy stored in chemicals which is released when they combine.\n\nIn a fuel cell, chemical energy is released in another type of chemical reaction.\n\nNuclear plants, windmills, hydroelectric dams or burning fuel in a generator turns a turbine or motor which moves a coil of wire through a magnetic field which produces energy.\n\nIn thermoelectric energy, heat is turned into electricity when two different metals are heated.
37744
you can't convert heat energy directly into free energy (electric current).  That would violate the second law of thermodynamics.  you can use a temperature DIFFERENCE to harvest free energy from thermal energy...
123323
Yes, by requiring to move the woofer with more ampltitude, requireing more force and thus more energy.  An interesting note is that most of the 'extra' energy required for the louder sound is not converted into sound...There is very little energy in sound.  I have read something where it would take over 8 years of 'shouting' to heat a cup of coffee.
596411
The telephone operates on simple principles. A telephone mouthpiece contains a thin metallic coating separated from an electrode by a thin barrier (today we use plastic) which connects to a wire carrying an electric current. When a person speaks into the mouthpiece, the acoustic vibrations from her speech push the metallic coating slightly closer to the electrode, resulting in variations in voltage and therefore a speedy conversion from acoustic to electric energy. The electric pulses are conveyed through a wire to the speaker on the other end, where electric pulses are converted into acoustic energy again.
961600
In the laws of thermodynamics, it is stated that energy can not be created nor destroyed, but may be converted from one form of energy to another.  So, it might be better to ask how does one convert various forms of energy into thermal energy?\n\nWell, in the world of HVAC, we can burn a hydrocarbon fuel such as oil or gas (energy), and the products of the combustion process will be heat energy, light, water vapor, carbon dioxide, carbon monoxide (we try to create very little of this stuff), and vaporous and particulate matter (smoke .. again, we try to create very little of this stuff too).  The heat and light energy can be placed next to, or mixed within substances that have a lower temperature, and thus heat energy will flow from the hotter products of combustion to areas and substances that are cooler (heat energy always travels from areas of higher temperature to areas of lower temperature).  If a heat exchanger is used, the above products of combustion will be on one side of the heat exchanger, and substances such as cool air or relatively cool water will be on the other side, heat energy will flow from the hot products of combustion to and through the cooler heat exchanger material, and then will flow from the heat exchanger to the even cooler substance your trying to heat such as the water or air.\n\nElectrical energy can be converted to heat energy (thermal energy) by passing a current through a device that has resistance (a resistor).  It takes electrical pressure (voltage) to push the electrons through a resistive material, but any flow of electrons through the resistive material will cause the material to heat up.  The formula P = I x E applies here and “P” will be the rate of power measured in watts, “I” stands for flow of electrons measured in amps, and “E” is electrical pressure measured in volts.  To convert watt hours to BTU's (a watt hour can be a watt that is running for one full hour), you multiply watt hours times 3.413 (I have seen conversion factors ranging from 3.412 to 3.415, I’m not sure what the exact conversion is, but any number in this range will be pretty accurate).\n\nThere are other ways of converting other forms of energy to heat energy, including mechanical energy (friction), other chemical reactions, solar radiation, nuclear reactions  etc.
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The potential energy, stored by the water due to its height, converts to kinetic energy as it falls. This turns the turbines which in turn create electrical energy.\n\nThis conversion requires the use of a generator (the rotation of the coils of wire that cuts through the magnetic fields of some magnets results in electricity forming; refer to Fleming.)
348003
Have a look at http://science.howstuffworks.com/power.htm
212281
Generally, appliances use electricity.  Some small amount of it is transformed to movement or light.  The majority of electricity is transformed to hear, which is dissipated to the environment.  Waste hear generated in this manner cannot effectively be captured and used for anything useful.  However, the waste heat generated by the refrigerator, light bulbs, and ovens will reduce the heat needed to keep your house warm in the winter.
974804
It won't work.  You can look at it this way:\n\nOne of the basic laws of physics is Conservation of Energy.  You can't create energy, nor is energy lost.  It is always constant, but it may change form.  Let me give several examples.\n\nThe energy associated with a swinging pendulum changes from kinetic (moving) energy at the bottom of the swing to potential energy at the top of the swing.  Back and forth, kinetic energy, potential energy, kinetic energy, potential energy, etc.  The swing of the pendulum does slowly die down, but that is due to the gradual transfer of kinetic energy to the surrounding air in the form of heat.\n\nIn the second example, the kinetic energy of a moving car is converted to thermal energy (heat) when you hit the brakes.  That's why your brakes get hot if you've been doing a lot of braking.  Of course, to get the car moving in the first place, the engine converts chemical energy from gasoline to thermal energy, which expands the gases in the pistons, pushing on the pistons to make the mechanical energy that turns the wheels.\n\nBack to your problem.  To charge a battery, the energy must come from somewhere.  The amount of energy coming from your voice is small, and certainly the amount of energy picked up by a microphone is much smaller, since most of the energy goes right on past the microphone.  It would take a very strong voice and a lot of talking to charge a battery, even if the charging circuit were perfect with no losses.\n\nNow, if your voice could turn a windmill.........
1119165
You would turn into energy.