28 Jan
2014
28 Jan
'14
2:02 a.m.
* Bill Gosper <billgosper@gmail.com> [Jan 28. 2014 09:46]:
[...]
OK, so why are μwave ovens so damn noisy?
The efficiency of the magnetron is not really near 100 per cent, so there is a rather great amount of heat the microwave needs to get rid of. Strong-ish airstream through rather randomly shaped duct ==> noise. Wiki states 64 per cent efficiency.
[...]