Electro-acoustic transducer with two diaphragms

Details Electro-acoustic transducer with two diaphragms Electro-acoustic transducer with two diaphragms

2005-08-16

2005-08-16

Kuntz, Curtis (Department: 2643)

Electrical audio signal processing systems and devices

Electro-acoustic audio transducer

Plural or compound reproducers

C381S418000, C381S423000, C181S173000

Reexamination Certificate

active

06931140

ABSTRACT:
The present invention relates to an electro-acoustic transducer suitable for applications within mobile communication equipment and hearing aids. The transducer comprises two diaphragms positioned on opposite sides of a magnetic circuit having two magnetic gaps. When used as a microphone the transducer is substantially insensitive to vibrations, and when used as a speaker the transducer generates only very low vibration levels. The magnetic circuit has a number of advantages compared to conventional transducers with circular magnetic. The transducer can be made lightweight and with very compact dimensions compared to conventional designs. In a preferred embodiment the diaphragms are rectangular. The transducer may additionally be used as a vibration generator for silent alarm signals.

REFERENCES:
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patent: 11-308691 (1999-11-01), None
patent: 2000-165987 (2000-06-01), None

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