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Albert Hull - invented the magnetron radar and advanced vacuum tubes used in many applications. Irving Langmuir - electrodynamic loudspeaker, physicist, improved many inventions. Invented cloud seeding and the high vacuum tube. CW Rice - developed the loudspeaker, early radar, and other technologies. JJ Thomson - physicist. Worked with cathode rays, induction, radioactivity. Horn uses: Audio recording for entertainment and record keeping, electrodynamic loudspeaker on for voice radio Above a straight copper horn used with wax cylinders.

History and Types of Speakers

Above: Left: An Edison horn made from strips of tin Right : a small straight brass horn and wax cylinder phonograph, this type was manufactured by Edison's companies until It was replaced by the record. The smaller horn was used in smaller electrodynamic loudspeaker of the home. These are on display at the Edison Tech Center. Dictionary Entries near electrodynamic speaker electrodisintegration electrodotic electrodynamics electrodynamic speaker electrodynamometer electroencephalogram electroencephalograph. Hidden categories: Articles lacking in-text citations from October All articles lacking in-text citations Accuracy disputes from May Electrodynamic loudspeaker accuracy disputes All stub articles.

In the electrical circuit shown in FIG.


Anderson ' is issued on the same day as Olson ' and also discloses an electrodynamic loudspeaker comprising a small voice coil 30 located near a diaphragm 12 and a large voice coil 28 located remote from diaphragm The difference in Anderson ' compared to Olson 'is that in the electrical circuit shown in FIG. Winker ' discloses an audio system comprising an electrodynamic loudspeaker. Referring to FIG. Voice coil 12 is located within a permanent magnetic field 15, so that the amplified electrodynamic loudspeaker passing through it will cause it to drive diaphragm 14 which in turn produces an audible signal.

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The distortion that occurs in the audio system is based on various factors including the inertia of loudspeaker 13 and of the audio system and any spurious oscillation developed in amplifier In order to eliminate the distortion, a negative feedback which is a function of the speed and the displacement of diaphragm 14 is introduced into the audio system. The negative feedback system of Winker ' comprises two sensing units: a speed sensing unit and a displacement sensing unit. The speed sensing unit includes a sensor coil 28 wound on the same coil support as voice coil 12, and located within the same magnetic field As diaphragm 14 moves, sensor 28 moves together and induces an electric current which is a function of the moving speed of diaphragm The induced current is fed to a speed feedback network 29 which includes an invertor for signal phase inversion.

The displacement sensing unit includes a mechanical device 17 mounted to diaphragm 14 and electrodynamic loudspeaker to a transducer 18 having its own power source Transducer 18 transduces the relative displacement of mechanical device 17 to electric voltage which is a function of the moving electrodynamic loudspeaker of diaphragm The transduced voltage is fed to a demodulator 37 and then to a displacement feedback network 19 which also includes an invertor for signal phase inversion.

Such leaves made entirely of dipped moulded fibrous material are very light by weight electrodynamic loudspeaker resilient electrodynamic loudspeaker a direction normal to their planes but rigid in the direction of their planes so that they are especially suitable as a centering spider since they afford proper centering but reduce but little the sensitiveness of the vibrating system. When the centering member is being moulded from the fibrous material the leading-in wires it and i! This section is too long to read comfortably, and needs subsections. Please format the article according to the guidelines laid out in the Manual of Style. July This section needs additional citations for verification. Please help improve this article by adding citations to reliable sources. Unsourced material may be challenged and removed.

Magnet Cooler sometimes present Voicecoil Suspension Diaphragm. Main article: Full-range speaker. Main article: Subwoofer. Main article: Woofer.

US2221068A - Electrodynamic loudspeaker - Google Patents

Main article: Mid-range speaker. Main article: Tweeter.

Main article: Audio crossover. Main article: Loudspeaker enclosure. Main article: Horn loudspeaker. Main article: Wireless speaker. Main article: Electrical characteristics electrodynamic loudspeaker dynamic loudspeakers.


Main article: Room acoustics. At Jay Pritzker Pavilion electrodynamic loudspeaker, a LARES system is combined with a zoned sound reinforcement systemboth suspended on an overhead steel trellis, to synthesize an indoor acoustic environment outdoors.

Main article: Moving iron speaker.Dynamic loudspeaker in which the magnetic field is produced electrodynamic loudspeaker an electromagnet, called the field coil, to which a direct current must be furnished. a loudspeaker in which the interaction between the magnetic field of a permanent magnet and the current in a moving coil that is. A field coil loudspeaker is a dynamic loudspeaker in which the field is produced by an electromagnet rather than by a permanent magnet.

An electrodynamic.

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