A location about half way between adjacent nodes where the amplitude is a relative maximum.
For an axial resonator:
- The front and back surfaces of the resonator will be antinodes.
- The antinode will have minimum axial stress. For this reason joints are usually located at antinodes, so that the stress on the joint and stud will be minimized.
- For a full_wave resonator there will be an additional antinode located at approximately midlength.