{TAIL ~ The composite transducer}, which is adapted for use with the human ear, includes at least three transducers, oriented to be substantially coplanar to each other: two oppositely oriented input transducers for converting acoustic waves into electrical signals, and at least one output transducer oriented facing the ear for converting electrical signals into {HEAD ~ acoustic waves} 
{ TAIL ~ The composite transducer } , which is adapted for use with the human ear , includes at least three transducers , oriented to be substantially coplanar to each other : two oppositely oriented input transducers for converting acoustic waves into electrical signals , and at least one output transducer oriented facing the ear for converting electrical signals into { HEAD ~ acoustic waves }
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