Abstract: An electroacoustic transducer is provided in the form of a flexible tape formed of an inner flat metal foil 10 surrounded by a metal foil 14 and separated from the latter by an electret 12. The outer metal foil 14 is in turn surrounded by a PVC outer layer 20. This construction provides a flexible electret type of microphone with the additional advantage of immunity from ambient acoustic waves and electrical and magnetic fields.
Type:
Grant
Filed:
January 22, 1981
Date of Patent:
June 21, 1983
Assignee:
C. Tape Developments Limited
Inventors:
Andre P. J. Bendyshe Walton, Francis H. Townsend, John N. Ribet