Electrical audio signal processing systems and devices – Electro-acoustic audio transducer – Electromagnetic
Reexamination Certificate
2007-04-10
2007-04-10
Tran, Sinh (Department: 2615)
Electrical audio signal processing systems and devices
Electro-acoustic audio transducer
Electromagnetic
C381S417000
Reexamination Certificate
active
10719809
ABSTRACT:
A paddle (142) of a diaphragm (118) of a receiver (100) is manufactured using one or more layers of a material selected for their inertial mass and rigidity. The paddle may have a layered structure with stiff outer layers such as aluminum and a less dense inner layer, such as thermoplastic adhesive. The inner and outer layers are selected to give an inertial mass matching that of an armature (124) of the receiver (100) and to give a lowest frequency bending resonance above a desired range, for example, 14 KHz.
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International Search Report dated Apr. 2, 2004 for PCT/US03/37268.
Jiles Mekell
Schafer David Earl
Ensey Brian
Knowles Electronics LLC.
Marshall & Gerstein & Borun LLP
Tran Sinh
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