From the site of the Spiritualist Church of Canada:
Direct Voice is accomplished with the aid of a horn or trumpet, usually of aluminum, which is used to intensify the spirit voices. It is also used as a cabinet into which the sound vibrations are drawn and in which the ectoplasmic vocal organs, necessary for articulation, are materialized. The trumpet will move around the circle and come to rest in front of the sitter it wishes to address. It has been shown to gently tap a sitter to indicate its intentions but with all its movements around the circle, it has never been recorded that the trumpet hit anyone by accident.
From the site of The Leslie Flint Educational Trust Ltd.:
"I am a medium, I have a rare gift known as the independent direct voice. I do not speak in trance, I need no trumpets or other paraphernalia. The voices of the dead speak directly to their friends or relatives and are located in a space a little above my head and slightly to one side of me. They are objective voices which my sitters can record on their own tape recorders to play later in the privacy of their own homes. Sometimes those who speak from beyond the grave achieve only a whisper, hoarse and strain, at other times they speak clearly and fluently in voices recognizably their own during life."
Taken from Voices in the Dark, Leslie Flint's autobiography.
Listen to a large choice of recordings of direct voice communications from the Spirit world.