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## can't we develop a device which combines both sound and solar energy for power production?

this is as follows... we produce electricity through different sources like hydropower, wind mill , thermal and ofcourse nuclear reactions. so won't it be feasible to produce electricity through sound? the output current which we get from a loud horn of a train would not be able to generate a power or 1/100 of a watt. but i guess a lot can be done by utilising the vibrations. also the sound is available on every corner of the earth and therefore there is no problem for the source. if we can somehow combine this so produced power with that of the solar energy, then there can be greater chances of power output. and through this process though minimum energy is generated, this can be replaced in many appliances like the batteries in a watch, or as a battery for the artificial pacemakers.

• #### Rajeev Sai

• +1
Sep 8 2012: after reading all the comments am happy that i could somehow manage to solve my own question (might be trivial)... and thanx for everyone for ua suggesstions and explanations !!!!
• #### Luke Stanley

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Sep 8 2012: Yes. I'm sure it's been done. A simple speaker will readily generate a small amount of electricity given a large sound. Combining that and a solar panel is trivial. Little energy is generated. No offense intended but this isn't a useful question.
• #### Sam Iam

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Sep 7 2012: Let's see...
Most of the ways we produce electricity converts heat into mechanical energy, and then to electricity.

--Nuclear power relies on heat to make electricity; the heat from the nuclear reaction heats water, creating steam, which causes a turbine to turn, and that's connected to a generator that creates electricity.
--Coal is used to heat water to create steam, which turns a turbine connected to an electric generator.
--Wind power uses the movement of the air to physically move an object - a turbine - which is connected to a generator which creates electricity.
--Hydropower uses the movement of water to physically move an object - a turbine - which is connected to a generator which creates electricity.

--Solar power relies on the energy in sunlight to knock out electrons in a semiconductor, and those electrons are routed into a circuit to produce electricity directly.

Sound does not involve anything moving, except for a wave. Air molecules move only enough to knock their neighbors to transfer the sound wave. If they moved any more, it would be wind, not sound.

If sound waves could somehow be collected and combined to create a sound wave with more energy, possibly, but I think that involves adding more energy than you'd be able to get out.

Interesting question.
• #### Gerald O'brian

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Sep 7 2012: It's called a microphone.
• #### Peter Law

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Sep 7 2012: The problem is the cost of producing the 'power station'. You have a good idea, but present technology couldn't make it viable.
We have plenty power available in the rising & falling of the tide, but again we haven't reached the stage of viability. Tidal however is much closer than sound.

:-)