DISPOSITIVO ELETTROACUSTICO CON RISPOSTA DIREZIONALE D'INTERVALLO DI FREQUENZE DI LARGA BANDA
An electroacoustic device comprises an array of electroacoustic transducer elements for producing a prescribed directional response pattern at a first frequency. Each element includes apparatus for restricting the frequency range of sound waves incident on said element so that the directional respon...
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Main Author | |
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Format | Patent |
Language | Italian |
Published |
20.03.1986
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Edition | 4 |
Subjects | |
Online Access | Get full text |
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