Abstract: An ultrasound transducer includes an array of acoustic elements, an integrated circuit, and an interposer. The interposer includes conductive elements that electrically connect the array of acoustic elements to the integrated circuit. An electrically conductive adhesive is engaged with the conductive elements of the interposer to electrically connect the interposer to at least one of the integrated circuit or the array of acoustic elements. The electrically conductive adhesive is anisotropically conductive.

Abstract: An ultrasound transducer includes an array of acoustic elements, an integrated circuit, and an interposer. The interposer includes conductive elements that electrically connect the array of acoustic elements to the integrated circuit. An electrically conductive adhesive is engaged with the conductive elements of the interposer to electrically connect the interposer to at least one of the integrated circuit or the array of acoustic elements. The electrically conductive adhesive is anisotropically conductive.

Abstract: An electronic navigation beacon, particularly for coastal navigation, in which an unmodulated carrier f.sub.c is transmitted from the first antenna of a pair of antennas, and a periodically modulated sideband f.sub.c .+-.f.sub.a is transmitted from both antennas, where f.sub.a is in the audio frequency domain. A cyclical RF phase variation is imposed on the sideband signal transmitted from the second antenna. The effect in space is that of a rotating radial having an audio frequency null, the periodic modulation providing the listener at a remote point with timing information enabling determination bearing as a function of the time of passage of the radial through the remote point relative to the start of rotation of the radial.