Title:
マイクロホン用周波数フィルタ装置とマイクロホン
Document Type and Number:
Japanese Patent JP6649171
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide a microphone frequency filter device and a microphone which can easily and continuously change a cutoff frequency with a simple configuration.SOLUTION: A frequency filter device (F) is for filtering a signal output from a microphone unit (50) of a microphone (1). A transformer (90), and a magnetic field applying section (102) for applying a magnetic field to the magnetic path of the transformer are included. The transformer includes a coil (96), a first core (93a), and a second core (93b). A magnetic flux of a first magnetic path (M1) formed by the first core is larger than a magnetic flux of a second magnetic path (M2) formed by the second core. The magnetic field applying section applies a magnetic field to the second magnetic path.SELECTED DRAWING: Figure 2
Inventors:
Hiroshi Akino
Application Number:
JP2016091698A
Publication Date:
February 19, 2020
Filing Date:
April 28, 2016
Export Citation:
Assignee:
Audio Technica Co., Ltd.
International Classes:
H04R3/00; H01F27/24; H01F27/245; H04R1/04
Domestic Patent References:
| JP2009267539A | ||||
| JP2008066962A | ||||
| JP63153965A | ||||
| JP53037012B1 | ||||
| JP50061348U | ||||
| JP50087951U | ||||
| JP2166709A |
Attorney, Agent or Firm:
Keiichi Nishimura