That would depend on the setting where they are going to be used. Sometimes there’s no other option but to locate the interpreter right next to the audience, in those cases a booth will probably be necessary to both provide a quiet environment for the interpreter to work, and to isolate him or her from the audience, since the sound of the interpreter’s voice can be distracting to the people nearby. In other cases, there’s ample room to place the interpreter away from the audience (backstage, in an adjacent room, all the way to the back of the venue), and the distance itself already fulfills the function that a booth would do. When selecting a booth, mobile ones are recommended for easy transportation. They can be tabletop to put on top of a table or walk-in, fully encapsulated with removable working table.