The three methods of voting in the senate is usually voice,roll-call and standing vote. although voice and roll-call voting methods are not part of the senate recognized methods but can be used for clarity pertaining to the use of other methods.there can't be a unanimous voting method in the senate because it is almost impossible to have a unanimous decision in the senate there is most likely an opposition for every bill raised in the senate.
standing vote: this is used when there is a bit of confusion about the result of a voice note and it is been requested by a senator.
Roll-call vote: In this method the clerk of the house ( senate ) calls out the names of every senator and each responds with a "yea" or "nay" a roll call is held when a minimum of eleven(11) senators present demands for it
voice vote is used to make a vote by saying yea or nah on a matter needed to be voted on
