Electrical audio signal processing systems and devices – Electro-acoustic audio transducer – Microphone capsule only
Reexamination Certificate
2006-01-10
2006-01-10
Le, Huyen (Department: 2646)
Electrical audio signal processing systems and devices
Electro-acoustic audio transducer
Microphone capsule only
C381S191000
Reexamination Certificate
active
06985597
ABSTRACT:
The present invention includes a variable directional capacitor microphone in which two capacitor elements are combined. Each of the capacitor elements includes a vibrating plate and a fixed electrode, and an acoustic resistance can be adjusted in the state that the microphone has been assembled. The variable directional capacitor microphone of this invention includes capacitor elements10a,10b.In each of the capacitor elements10a,10b,each of vibrating plate supporting members12a,12b,each of spacer rings13a,13b,each of fixed electrodes14a,14bhaving through holes141and each of pedestals15a,15bhaving a through hole in each center of the pedestals are assembled in this order, respectively, in each of ring-shaped cases16a,16b.Each of vibrating plates11a,11bis strained and fixed on each of vibrating plate supporting members12a,12b,respectively. The capacitor elements10a,10bare combined through a connecting ring22having female screw threads221with the pedestal15a,15bfacing back-to-back. An elastic acoustic resisting member31is disposed between the pedestals15a,15b.The acoustic resistance of the acoustic resisting member31can be adjusted with the lengths of thread engagement of the pedestals15a,15bwith the connecting ring22.
REFERENCES:
patent: 4156800 (1979-05-01), Sear et al.
patent: 07143595 (1995-06-01), None
patent: 3299829 (2002-04-01), None
Kabushiki Kaisha Audio-Technica
Le Huyen
Welsh & Katz, LTD
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