The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 10, 1990
Filed:
May. 01, 1989
Applicant:
Inventor:
Friedrich Hoering, Kiel, DE;
Assignee:
Honeywell Elac Nautik GmbH, , DE;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H04R / ;
U.S. Cl.
CPC ...
367153 ; 367155 ; 367158 ; 310337 ;
Abstract
An omnidirectional acoustic transducer achieves a broadband radiation or reception pattern with high efficiency by using several transducer rings located side-by-side with each ring comprising a plurality of radially directed individual transducer elements. The transducer elements in each of the rings are tuned to a particular natural frequency and are designed accordingly. Within each ring the transducer elements are energized in phase with one another. The natural frequency of the individual transducer elements differs from one ring to the other.