Converting sound to electrical energy

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Discussion Overview

The discussion centers on the feasibility of converting sound energy into electrical energy using piezoelectric materials. It explores various applications and the efficiency of such conversions, including historical context and practical limitations.

Discussion Character

  • Exploratory
  • Technical explanation
  • Debate/contested

Main Points Raised

  • Some participants propose that piezoelectric materials can convert sound energy to electrical energy, citing their use in microphones and guitar pickups.
  • Others mention historical applications, such as in ceramic cartridges for record players and the potential use in traditional telephones.
  • One participant questions the definition of 'Energy' in this context, suggesting that the amount of energy obtainable from sound is minimal and not sufficient for practical use.
  • Concerns are raised about the sound levels required for effective energy conversion, suggesting that high sound levels could be harmful to individuals.

Areas of Agreement / Disagreement

Participants express differing views on the practicality and efficiency of converting sound energy to electrical energy. While some acknowledge existing applications, others challenge the viability of such methods for generating useful amounts of energy.

Contextual Notes

There are unresolved assumptions regarding the definitions of energy and the conditions under which sound energy could be effectively converted. The discussion reflects a range of perspectives on the potential and limitations of this technology.

titothomas
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Is there any possibility to converting sound energy to electrical energy by using piezo electric material.
 
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Yes. It has been done for over 50 years in ceramic cartridges for record players and in some microphones.
 
titothomas said:
Is there any possibility to converting sound energy to electrical energy by using piezo electric material.
Also used inguitar pickups
 
Moderator's note: posts on a new topic were moved from original thread to newly created thread.
 
titothomas said:
Is there any possibility to converting sound energy to electrical energy by using piezo electric material.

It used to be done all the time with the POT device (POT = plain old telephone)

http://www.packetworks.net/res/pub/images/phone_red.jpg
 
I thought plain old telephones used a carbon mic.
 
I think Av... is correct,I also don't think old fashioned phones used piezo crystals as microphones or speakers
 
I think the question is more to do with what we mean by 'Energy'. Is it 'Energy' as a detectable signal or 'Energy' in the quantity that could be used as a useful resource.
As has been stated dozens of times before, there is just not enough 'Energy' around, in the form of sound, to provide us with any significant amount as a resource. A few milliWatts (maximum) is just not enough to make a significant difference to our lives.
To live in any conditions where there would be enough sound level to drive any of our equipment would involve wearing ear protectors and doing ourselves physical harm, probably. Do you want to live in the Dartford Tunnel or at the end of a Heathrow runway?
 

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