Method of producing electroacoustic converters, preferably micro

Details Method of producing electroacoustic converters, preferably micro Method of producing electroacoustic converters, preferably micro

1984-12-21

1987-10-06

Rubinson, Gene Z.

Metal working

Method of mechanical manufacture

Electrical device making

381174, 381191, 381202, H04R 3100, H04R 102, H04R 700, H04R 1900

Patent

active

046973346

ABSTRACT:
An electroacoustic converter with a closed-off resonance chamber, e.g. a microphone, including frame (1) carrying an electrode (2) and a diaphragm (3) connected by a connecting member (5) to an amplifier. A band (17) of plastically deformable material is sealingly attached to the frame via a weld joint (15) for providing good bass reproduction. The sensitivity of the microphone, which depends on the volume of the resonance chamber, is adjusted to the desired value by forming a depression (16) in the band. In production, the frames (1) are attached to the band (17) and are conveyed thereby between different operation stations. Sensitivity is measured by a measuring apparatus (20) and a loudspeaker (18) and is adjusted by a tool (19).

REFERENCES:
patent: 2518805 (1950-08-01), Massa
patent: 3663768 (1972-05-01), Madsen et al.
patent: 4331840 (1982-05-01), Murphy et al.
patent: 4429193 (1984-01-01), Busch-Vishniac et al.
patent: 4511768 (1985-04-01), Patel
PCT reference, WO83/01362, "Lead-Frame for an Electret Microphone", Madsen et al., published Apr. 14, 1983.
The Bell System Technical Journal, "The E12 Electret Transmitter Analytical Modeling, Optimization, and Design," vol. 58, No. 7, Sep. 1979, pp. 1557-1578.

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