Method of manufacturing electroacoustic transducer elements whic

Details Method of manufacturing electroacoustic transducer elements whic Method of manufacturing electroacoustic transducer elements whic

1979-01-02

1980-03-04

Hall, Carl E.

Metal working

Piezoelectric device making

29593, 29594, H04R 3100

Patent

active

041909372

ABSTRACT:
An improved method of manufacturing electroacoustic transducers which emp vibratile transducer elements includes an automatic method of measuring the motional impedance vs. frequency characteristics of a plurality of transducer elements and an automatic method of segregating the transducer elements into separate groups which are selected in accordance with the similarities of the measured motional impedance characteristics of the elements. The separate groups of selected transducer elements are then processed by changing a mechanical dimension of the elements in each separate group by a different specified amount which adjusts the motional impedance vs. frequency characteristic of each separate group to the same specified desired value. The processed transducer elements are then assembled into complete transducers, thereby achieving improved uniformity in the performance characteristics of the transducers which is obtained at relatively low cost.

REFERENCES:
patent: 4050126 (1977-09-01), Ikeno et al.
patent: 4062154 (1977-12-01), Huguenin et al.

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