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Electrical Engineering/Noiseless Electric Grinder Mixer.


QUESTION: Dear Prof Cleggsan

Is it possible to design Noiseless Electric Grinder Mixer?.


ANSWER: I am troubled with your use of the word "noiseless" which means NOISELESS or without any noise at any level.  Where there are things being moved around, whether the shaft of the motor or food inside the grinder mixer bowl there will be noises generated.

Some motors are more quiet than others but still there is noise.  And the contents, such as food, being ground inside the mixing bowls are also very noisy.

So, I am sorry the answer is "no" it is not practically possible to create or design a "noiseless" electric grinder or mixer or any other product that has moving and rotating parts or mechanisms.

Sound can be reduced by careful design methods using  precision and exotic parts and materials but in the end there will still be noises generated when the apparatus in running.

Does this answer the question?

---------- FOLLOW-UP ----------

QUESTION: Dear Prof Cleggsan


Can Sound proof glass enclosure covering the Electric Grinder Mixer help in this regard?.


Glass is not a good sound insulator as a general rule.  A glass enclosure may reduce the high frequencies somewhat but will not attenuate the lower and more mechanical spectrum.

I don't think glass is a very good idea but experimentation with a given design would be necessary to know for sure.  

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