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Very little difference, if any. The terms are usually interchangeable

Broadcast and sound engineering technicians and radio operators perform a wide variety of tasks. Their duties include setting up and maintaining the electrical equipment used in nearly all radio and television broadcasts, concerts, plays, sound recordings, and movies. There are many specialized occupations in this field.

Audio Engineers, sometimes called sound engineers or sound engineering technicians, manage and operate the equipment used to record, manipulate and reproduce speech, music and other sounds.

Read more: Audio Engineering Career Description | eHow.com http://www.ehow.com/about_5464877_audio-engineerin...