Can sound wave also interference just like EM wave

AI Thread Summary
Sound waves can indeed interfere, similar to electromagnetic waves. This phenomenon is demonstrated through effects like standing waves, where certain locations experience amplified sound while others have minimal or no sound. An example of this was observed in a lecture hall at Cornell, where a low-frequency sound generator created significant variations in sound intensity across different areas. The discussion clarifies that sound waves can diffract and exhibit interference patterns. Understanding sound wave interference is essential for applications like noise cancellation technology.
Rico L
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its my exam question.. i am not so sure... but i put it can't because sound is a wave of vibration which it can diffract but not interence... but i don't know.. can sound wave interference?

cheers
 
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Yes. That is what the Bose noise cancelling headphones do.
 
awww! damn ! i got it wrong!--

thanks anyway
 
Rico L said:
can sound wave interference?

cheers

Yes indeed. I witnessed a dramatic demonstration of this at Cornell. A low frequency sound generator was activated at the front of a large lecture hall. Standing waves were set up in the hall's air. At one location the noise was very loud. If you stepped away to a nearby location, you couldn't hear anything!
 
Thread 'Motional EMF in Faraday disc, co-rotating magnet axial mean flux'
So here is the motional EMF formula. Now I understand the standard Faraday paradox that an axis symmetric field source (like a speaker motor ring magnet) has a magnetic field that is frame invariant under rotation around axis of symmetry. The field is static whether you rotate the magnet or not. So far so good. What puzzles me is this , there is a term average magnetic flux or "azimuthal mean" , this term describes the average magnetic field through the area swept by the rotating Faraday...
It may be shown from the equations of electromagnetism, by James Clerk Maxwell in the 1860’s, that the speed of light in the vacuum of free space is related to electric permittivity (ϵ) and magnetic permeability (μ) by the equation: c=1/√( μ ϵ ) . This value is a constant for the vacuum of free space and is independent of the motion of the observer. It was this fact, in part, that led Albert Einstein to Special Relativity.

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