Normal: Hearing volume is the same in both ears
Abnormal: Hearing volume is louder in one ear
      +Sensorineural hearing loss: (no hearing whatsoever due to nerve damage) hearing volume loud in unaffected ear, i.e., the ear that has normal nerve can hear fine while the ear with the sensorineural issue is unable to hear whatsoever
      +Conductive hearing loss: (no hearing due to some mechanical damage) hearing volume loud in the affected ear, i.e, the ear that has

Basis of the test: Vibrations of tuning fork

Mnemonics:
Visualize you use your fingers to make a 'W' sign and put that on ur head. Weber is on the top of ur head. To remember that, in Weber test, the conductive hearing loss is louder, try re-creating a conductive hearing loss by putting your finger into one of the ear canal and try the Weber test, you'll see that the hearing is louder in the plugged ear.

~by Qt

See more:
http://www.internalizemedicine.com/2011/12/deciphering-the-weber-and-rinne-tuning-fork-tests.html

https://books.google.com/books?id=CvgxUpZ7ZfUC&pg=PA236&dq=bone+conduction+weber&hl=en&sa=X&ved=0ahUKEwio5qbiop3SAhUC0GMKHbnjAjgQ6AEIIzAC#v=onepage&q=bone%20conduction%20weber&f=false