IMPROVEMENTS IN AND RELATING TO TRANSMISSION LINE LOUDSPEAKERS

The sound wave radiated from the front surface (UF) of a loudspeaker driver diaphragm is of opposite polarity with respect to that radiated from the back surface (UB). If the two signals are directly combined, they will tend to cancel one another. An acoustic phase inversion network (5) is used to e...

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Bibliographische Detailangaben
Hauptverfasser:	HOGE, WILLIAM, JOHN, JOSEPH, EGHTESADI, KHOSROW
Format:	Patent
Sprache:	eng
Schlagworte:	ACOUSTICS ACOUSTICS NOT OTHERWISE PROVIDED FOR DEAF-AID SETS ELECTRIC COMMUNICATION TECHNIQUE ELECTRICITY LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKEACOUSTIC ELECTROMECHANICAL TRANSDUCERS METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING,NOISE OR OTHER ACOUSTIC WAVES IN GENERAL MUSICAL INSTRUMENTS PHYSICS PUBLIC ADDRESS SYSTEMS SOUND-PRODUCING DEVICES
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Beschreibung
Zusammenfassung:	The sound wave radiated from the front surface (UF) of a loudspeaker driver diaphragm is of opposite polarity with respect to that radiated from the back surface (UB). If the two signals are directly combined, they will tend to cancel one another. An acoustic phase inversion network (5) is used to ensure that the backwave is in phase with the front wave, and the combined signals are used to drive the inlet of a loudspeaker transmission line (6). L'onde acoustique émise à partir de la face avant (UF) de la membrane amplificatrice d'un haut-parleur présente une polarité opposée à celle de l'onde émise à partir de la face arrière (UB). Si l'on associe les signaux directement l'un à l'autre, ils auront tendance à se neutraliser. On utilise un réseau inverseur de phase acoustique (5) pour s'assurer que l'onde arrière est en phase avec l'onde avant, et l'on utilise les signaux associés pour commander l'entrée d'une ligne de transmission (6) de haut-parleur.