Development and Analysis of Four Pole Balanced Armature Transducer for US Navy Sound Powered Telephones.

摘要

A thorough analytical study of the Four Pole Balanced Armature Transducer has been made and its application to a sound powered telephone has been examined. Four prototype transducers have been fabricated and tested. These transducers proved to be more efficient than the current 2 pole devices, with overall transducer-to-transducer response showing a 3 - 7 db increase in overall sensitivity. This increase is attributed not only to the inherent improvement in sensivity of the 4 pole transducer over the 2 pole transducer but also to the lighter mass structure of an interconnecting tube through the diaphragm to improve low frequency response. (Author)