Question on Magnetic polarization

[arlo]

Question on Magnetic polarization

Is it possible to hear/record the sound created by the shifting of the alignment of magnetic dipoles when introduced to an external magnetic field?

I believe that for some materials, this shifting causes friction which in return produces sound. Has anyone done this before?

 

[Lojzek]

Once I saw (or rather heard) an experiment on this topic. If I understand it right, you don't have to wait for dipoles to cause mechanical vibrations. With a microphone you can get sound directly from moving dipoles, because they cause changing magnetic field which induces voltage in the microphone.

 

[astrokreng]

I can say that it is possible to hear and record the sound created by the shifting of magnetic dipoles when introduced to an external magnetic field. This phenomenon is known as magnetostriction, where the change in magnetic polarization causes a change in the shape and size of the material. This change in shape can produce vibrations and sound waves that can be detected and recorded. This has been studied and utilized in various fields, such as in the development of sensitive magnetic sensors and in the creation of musical instruments like the magnetostrictive piano. However, the amount of sound produced may vary depending on the material and the strength of the external magnetic field. Further research and experimentation may be needed to fully understand and utilize this phenomenon.