Electrical audio signal processing systems and devices – Electro-acoustic audio transducer – Having bi-directional transducer
Reexamination Certificate
2008-01-08
2008-01-08
Mei, Xu (Department: 2615)
Electrical audio signal processing systems and devices
Electro-acoustic audio transducer
Having bi-directional transducer
C381S162000, C381S091000, C381S122000
Reexamination Certificate
active
11127258
ABSTRACT:
A sound collecting device is provided which is designed to minimize adverse effects on an output caused by exposure of an electroacoustic transducer to the air. The device includes an electroacoustic transducer and a vibrating circuit. The transducer is exposed to the air and responsive to input of a sound wave to produce a corresponding acoustic signal. The vibrating circuit vibrates the transducer to shake foreign substances such as dust or drops of water from the transducer. In a modified form, an electromagnetic sensor is provided which measures an electromagnetic noise transmitted to the transducer and which removes the electromagnetic noise from an output of the transducer to produce a noiseless acoustic signal.
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Connolly Bove & Lodge & Hutz LLP
Mei Xu
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