Maximizing Ultrasonic Wave Production with Magnetostriction Method

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The discussion centers on the feasibility of using a simple setup with a single nickel rod wound with wire to produce ultrasonic waves through the magnetostriction method. The user questions the necessity of feedback in this method and suggests that passing current through the setup would create a magnetic field, causing vibrations and generating ultrasonic waves. They mention researching existing methods online for further understanding. The conversation highlights a basic approach to ultrasonic wave production, emphasizing the need for clarity on the role of feedback in the process. Overall, the inquiry seeks to simplify the magnetostriction method for practical application.
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I don't really understand what is the need of giving feedback in the magnetostriction method to produce ultrasonic waves.

I am thinking of just winding a single rod over a nickel rod and then connecting then connecting the 2 ends to a battery. When the current is passed,magnetic field develops and the rod vibrates and produces ultrasonic waves. Is this possible?
 
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smart_worker said:
I am thinking of just winding a single rod over a nickel rod and then connecting then connecting the 2 ends to a battery. When the current is passed,magnetic field develops and the rod vibrates and produces ultrasonic waves. Is this possible?

I added the words "then connecting" twice. That's why this question appears lame.
 
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