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.