Title: Electroacoustic transducer design for eliminating phantom target errors in sound ranging systems

Abstract: A baffle structure for use with an electroacoustic transducer in a sound ranging system eliminates secondary reflections between the transducer and target, thus eliminating false target errors that occur in conventional sound ranging systems due to phantom target indications caused by multiple reflections between the transducer and target.

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Inventors: Massa, Frank (Cohasset, MA, US)

Application Number: 630364
Filing Date: 1975-11-10
Publication_date: 1977-09-20
Assignee: Fred M. Dollorfano, Jr. and Donald P. Amassa, Trustees of The Stoneleigh (Cohasset, MA)
Primary Class(es): 367/191 367/92, 367/151
Other Classes:
US Patent Ref:

2000806	May, 1935	White	340/5.
2567407	Sep, 1951	Slaymaker	340/8.
2844809	Jul, 1958	Batchelder	340/8.
3611276	Oct, 1971	Massa	340/3.
3715709	Feb, 1973	Zacharia, Jr. et al.	340/3.

Other Refs: Other References: Sunthankar, IEEE Trans. Sonics and Ultrasonics, vol. SU-20, No. 3, July 1973, pp. 274-278.