Arrangement for converting oscillations in headphones

Details Arrangement for converting oscillations in headphones Arrangement for converting oscillations in headphones

1975-05-12

1977-01-25

Cooper, William C.

H03H 930

Patent

active

040052672

ABSTRACT:
An arrangement for headphones for converting frequency modulated audio oscillations into amplitude modulated oscillations, and particularly for rendering audible the vibrato of electronic musical instruments, such as electronic organs, includes a housing having an electroacoustic transducer therein with a diaphragm having a smooth frequency response zone which is connected to at least one mechanical transit-time member having a transit time from one end to the other not greater than 20 ms. The transit-time member is advantageously a helical spring which extends axially through the electroacoustic transducer or through a central ferromagnetic core thereof. The portion of the spring within the core is advantageously made of a thicker wire and of a smaller diameter than the remaining core so that it does not contact the walls thereof.

REFERENCES:
patent: 3922489 (1975-11-01), Ojima et al.

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