Pull the other one!
The hum you hear is actually double the mains frequency (100/120 Hz) with emphasis on odd harmonics going up. Magnetostriction gives you two expansion/contraction events per wavelength, effectively doubling the…
Pull the other one!
The hum you hear is actually double the mains frequency (100/120 Hz) with emphasis on odd harmonics going up. Magnetostriction gives you two expansion/contraction events per wavelength, effectively doubling the…