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Converting noise into electrical energy

by kthouz
Tags: convert, electric, energy, noise, piezo
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exilus29
#19
Feb25-10, 12:44 AM
P: 10
^sir willem2 do you have an idea about sound to electrical energy?we want to at least light a LED
kthouz
#20
Feb25-10, 01:05 AM
P: 199
Quote Quote by exilus29 View Post
can sum1 give or enlighten me with "sonea". we have a feasibility study and our topic is about harnessing sound energy to electrical energy.we are having a hard time but we cant back up now.can sum1 help me with this topic?any1 there who could help me plz do
whatelse i could know about converting noise into electricity is about the "piezoelectric effect". Sonea is just a device which was designed (based on piezoelectric effect per harps) for that task but the website where i found it did not have any physical principle of it. Just try to google and see if you can find something
exilus29
#21
Feb25-10, 01:18 AM
P: 10
how far did you try to make a circuit that can convert sound to electrical energy
kthouz
#22
Feb25-10, 01:23 AM
P: 199
i didnt do anything else apart documentation. I talked with the one whom i wanted to be my supervisor and told me that it is a higher level project and that it was not more efficient in my country. But what i know the key is about the piezoelectric effect. And furthermore, any vibrations (mechanical energy) can be converted into electricity through a transducer. This is even how microphones work. I wish i can help you as i can.
exilus29
#23
Feb25-10, 01:26 AM
P: 10
wew that is our big problem our thesis is about sound and our dean/prof is strict about the title that we cant use vibrations as an alternate for the sound energy
kthouz
#24
Feb25-10, 01:31 AM
P: 199
look, i have a friend who is working on a microphone, i will ask him and tell you more details, coz i think your project seems to be a modification of a microphone because you will be dealing with louder sounds (eg. from industries' machines) and you will not need higher amplifiers, right? Here is my email adress if you still want to contact me giray03@yahoo.fr
exilus29
#25
Feb25-10, 01:33 AM
P: 10
thanks for that...yes i really need sum1s advise we are lacking out of time and im only a student need sum1 who has more knowledge about this topics add me up>soulstriker29@yahoo.com
amit9203
#26
Mar30-11, 09:20 AM
P: 1
Quote Quote by kthouz View Post
Hello everyone!
I have an idea of making a device that can convert noise into electrical energy.
In many fields (industries, cars, construction machines,...), some used machines make much noise, then I thought as sound (noise) causes mechanical energy, why not convert that mechanical into electrical energy as microphones do to convert the sound into electrical signals? But here, i would like that device to be more efficient than a microphone.
So if anyone worked on the same project or knows something about it that can be helpful, please let me know.
Thank you.
I will be posting here what i've done so far.
my friend
i m also working on this project.would you help me in all stages from beagining to last step
kthouz
#27
Mar30-11, 09:32 AM
P: 199
Quote Quote by amit9203 View Post
my friend
i m also working on this project.would you help me in all stages from begining to last step
Look, am sorry I could not carry out this project since at my school, I could not find all the necessary equipment to implement that machine. That I was advised by a teacher that I had chosen to supervise me. However, I still thinking that the key point is the understanding of piezzo-electric materials. These are types of materials which present potential difference when they undergo a deformation. Just try to find out some books. Furthermore, do not think about amplification (since you would fall in the context of the microphone). I wish I could be more helpful, so fill free to contact me directly if you want at giray03@yahoo.fr
Best wishes my friend.

P.S: Would you also refer to the #8 comment of this thread. Loren Booda has talked about something like "Magnetic Damper" and I think it may be interesting. Please check on it.
Quote Quote by Loren Booda View Post
I would foremost consider a magnetic damper (e.g., a magnet and a coil mounted on relatively vibrating surfaces) that generates current.

Also, a putative model for a Maxwell's demon, of which there are many applied to "thermal acoustic noise," could more realistically be modified to your purpose.
sophiecentaur
#28
Mar30-11, 09:50 AM
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If you shout into a loudspeaker cone, the electrical energy it will produce can drive a distant earphone. With a jet engine a few metres away, the energy level would be a bit higher than that but you could only intercept a small fraction of what the engine is producing.
This article -
http://www.quiet.org/readings/tatum.htm
gives you some idea of the flow of sound energy.
60dB, which corresponds to 'normal conversation', corresponds to 1 microWatt per square metre.
120dB is around a nearby Jet engine noise level and would correspond to just 1W per square metre.

Allowing for inefficiency in any transducer you were using, this would probably end up as 0.1W of useful electrical energy. As a way of re-using 'lost' noise energy it seems to be pretty poor value, unfortunately.

It is actually amazing what a very good job your ears do, when you think that 0dB corresponds roughlt to the threshold of hearing. A millionth of a normal conversation level can just be detected.
kwaekins
#29
Mar31-11, 05:29 PM
P: 3
I have considered using crystals as a primary source for energy generation. Consider a turning fork. It is not large, nor loud, yet it can shatter glass. I am sure with the primary tone and it's harmonics, some acustic engineering and channeling it's point of critical mass or it's most effective convergent frequency; energy can be gleaned. The problem is not creating energy, the problem is increasing the yield. Once you increase the yeild of one, the same approach can be use to increase all forms of energu.
JaredJames
#30
Mar31-11, 05:48 PM
P: 3,387
Quote Quote by kwaekins View Post
I have considered using crystals as a primary source for energy generation. Consider a turning fork. It is not large, nor loud, yet it can shatter glass. I am sure with the primary tone and it's harmonics, some acustic engineering and channeling it's point of critical mass or it's most effective convergent frequency; energy can be gleaned. The problem is not creating energy, the problem is increasing the yield. Once you increase the yeild of one, the same approach can be use to increase all forms of energu.
Increasing the yield?

The energy has to come from somewhere. You can't just take a small amount and output a large amount.

Are you aware why a tuning fork is able to break glass?
sophiecentaur
#31
Mar31-11, 05:57 PM
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Quote Quote by kwaekins View Post
I have considered using crystals as a primary source for energy generation. Consider a turning fork. It is not large, nor loud, yet it can shatter glass. I am sure with the primary tone and it's harmonics, some acustic engineering and channeling it's point of critical mass or it's most effective convergent frequency; energy can be gleaned. The problem is not creating energy, the problem is increasing the yield. Once you increase the yeild of one, the same approach can be use to increase all forms of energu.
A tuning fork is not loud because it doesn't couple its vibrational energy out into the air efficiently. (You need a sounding board to hear it). But it has (relatively) a lot of energy in it - you give it a hard bash to get it going. That energy is more than enough to smash a glass, which makes sense because, if you gave the glass the sort of bash you give a tuning fork, you could break it and cut out the middle man.

You can alter the 'yield', as you put it, but not to get more out than you put in.

But which are you discussing, noise production or noise reception? What are you actually trying to do with this noise?
kwaekins
#32
Mar31-11, 06:45 PM
P: 3
I has thinking that there might be sources of sound that can be regenerative and more efficient than others. I also thought that even a small amounts of energy can be increased by using circuits like voltage doubler over and over until you reach a goal voltage..
JaredJames
#33
Mar31-11, 06:48 PM
P: 3,387
Quote Quote by kwaekins View Post
I also thought that even a small amounts of energy can be increased by using circuits like voltage doubler over and over until you reach a goal voltage..
Of course, but you have to input that additional energy. It has to come from somewhere.

I have no idea what a "regenerative sound" is so I'll leave that to someone else.
sophiecentaur
#34
Apr1-11, 12:41 AM
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1. What do you mean by an "efficient" source of sound?
2. In my figures for available power of sound noise, I was, of course, assuming 100% efficiency. A voltage doubler gives no more power. That's basics.
kthouz
#35
Apr1-11, 03:50 AM
P: 199
Quote Quote by jarednjames View Post
Increasing the yield?

The energy has to come from somewhere. You can't just take a small amount and output a large amount.

Are you aware why a tuning fork is able to break glass?
I also think that increasing the yield should violate thermodynamics laws. And about about the point that a turning fork is able to break a glass may be depending on the structure of the glass and the resonance phenomenon. May be kwaekins should have some interesting ideas to share but he has to explain clearly
kwaekins
#36
Apr4-11, 08:59 AM
P: 3
Thank you for your responses, it is Challenging to read them. I am assembling some data and i will respond.


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