Robert's Rules of Order Newly Revised (RONR) states that a voice vote (viva voce) is the usual method of voting on any motion that does not require more than a majority vote for its adoption. It is considered the simplest and quickest of voting methods used by deliberative assemblies. The presiding officer or chair of the assembly will put the question to the assembly, asking first for those in favor of the motion to indicate so verbally ("aye" or "yes"), and then ask those opposed to the motion to indicate so verbally ("no"). The chair will then estimate which side had more members.
A simple rising vote (in which the number of members voting on each side stand, or "rise") is used principally in cases in which the chair believes a voice vote has been taken with an inconclusive result, or upon a motion to divide the assembly. A rising vote is also the normal method of voting on motions requiring a two-thirds vote for adoption. It can also be used as the first method of voting when only a majority vote is required if the chair believes in advance that a voice vote will be inconclusive. The chair can also order the rising vote to be counted.
Show of hands
A show of hands is an alternate to voice voting and can be used as the basic voting method in small boards or committees, and it is so used in other informal or small gatherings for voting. It is more precise than a voice vote but does not require members to leave their seats. However, it does not count as a division of the assembly, and is not always as effective as a rising vote in causing a maximum number of members to vote who have not done so.