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A combined fan and loudspeaker element, comprising a motor driven rotor provided with wings or blades, wherein the wings or blades are adjustable in pitch resulting together with a rotation of the rotor in an air transport flow, said wings or blades having superimposed thereon a sound-pitch modulati...

Ausführliche Beschreibung

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Bibliographische Detailangaben
1. Verfasser:	LARS STROEMBAECK
Format:	Patent
Sprache:	swe
Schlagworte:	DEAF-AID SETS ELECTRIC COMMUNICATION TECHNIQUE ELECTRICITY LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKEACOUSTIC ELECTROMECHANICAL TRANSDUCERS PUBLIC ADDRESS SYSTEMS
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Beschreibung
Zusammenfassung:	A combined fan and loudspeaker element, comprising a motor driven rotor provided with wings or blades, wherein the wings or blades are adjustable in pitch resulting together with a rotation of the rotor in an air transport flow, said wings or blades having superimposed thereon a sound-pitch modulation corresponding to a desired sound-pitch with the rotation of the rotor.