公开(公告)号：US20140112514A1

公开(公告)日：2014-04-24

申请号：US14057587

申请日：2013-10-18

Applicant: KABUSHIKI KAISHA AUDIO-TECHNICA

Inventor： Satoshi YOSHINO

IPC: H04R3/00

CPC classification number: H04R3/00 ,  H04R19/04

Abstract: A first diaphragm FD and a second diaphragm RD are respectively arranged across a fixed electrode BP at both sides to constitute the variable directivity condenser microphone. A microphone body 1 includes a vacuum tube Q1 for impedance converting an audio signal obtained at the fixed electrode, and a connector 2 provided with a hot side connector terminal and a cold side connector terminal through which the audio signal that is impedance converted by the vacuum tube is outputted in parallel. A means for supplying a polarization voltage applied to the second diaphragm RD from an external power supply circuit 3 is arranged such that the hot side connector terminal and the cold side connector terminal are used as a forward conductor and a ground connector terminal for the microphone body arranged at the connector is used as a return conductor.

Abstract translation: 第一隔膜FD和第二隔膜RD分别布置在两侧的固定电极BP上，以构成可变方向性电容话筒。 麦克风主体1包括用于阻抗转换在固定电极处获得的音频信号的真空管Q1和设置有热侧连接器端子和冷端连接器端子的连接器2，通过该连接器端子通过真空阻抗转换的音频信号 管并行输出。 用于从外部电源电路3提供施加到第二膜片RD的极化电压的装置被布置成使得热侧连接器端子和冷端连接器端子用作正向导体和用于麦克风体的接地连接器端子 布置在连接器处用作回流导体。

公开(公告)号：US20170064449A1

公开(公告)日：2017-03-02

申请号：US15243129

申请日：2016-08-22

Applicant: KABUSHIKI KAISHA AUDIO-TECHNICA

Inventor： Hiroaki FURUYA ,  Hiroshi AKINO ,  Satoshi YOSHINO

IPC: H04R3/06 ,  H05B33/08 ,  F21V33/00 ,  F21V23/04 ,  H04R19/04 ,  H04R1/08

CPC classification number: H05B33/0842 ,  H04R1/08 ,  H04R3/00 ,  H04R19/04

Abstract: An audio output circuit of a condenser microphone includes a condenser microphone unit, first and second impedance conversion circuits that receive a positive phase output signal and a reverse phase output signal from the condenser microphone unit, first and second output circuits that output an audio signal from the condenser microphone unit in a balanced line to a balanced output terminals upon receipt of outputs of the first and second impedance conversion circuits. First and second impedance conversion circuits respectively use FETs as source follower circuits and supply first and second impedance conversion outputs generated across source resistors to the first and second output circuits. A voltage regulating device that generates a constant voltage is connected in series to the source resistors. With this configuration, an audio output circuit of a condenser microphone is provided, which solves a problem of operation instability caused by variation of Idss's of the FETs.

Abstract translation: 电容麦克风的音频输出电路包括电容麦克风单元，从电容式麦克风单元接收正相输出信号和反相输出信号的第一和第二阻抗转换电路，从电容麦克风单元输出音频信号的第一和第二输出电路， 所述电容麦克风单元在接收到所述第一和第二阻抗转换电路的输出时在平衡线路中连接到平衡输出端子。 第一和第二阻抗转换电路分别使用FET作为源极跟随器电路，并将源极电阻器两端产生的第一和第二阻抗转换输出提供给第一和第二输出电路。 产生恒定电压的电压调节装置与源极电阻串联连接。 利用这种配置，提供了一种电容麦克风的音频输出电路，其解决了由于FET的Idss的变化引起的操作不稳定性的问题。

公开(公告)号：US20130216084A1

公开(公告)日：2013-08-22

申请号：US13763019

申请日：2013-02-08

Applicant: KABUSHIKI KAISHA AUDIO-TECHNICA

Inventor： Hiroshi AKINO ,  Tatsuya IKEDA ,  Satoshi YOSHINO

IPC: H04R1/32

CPC classification number: H04R1/326 ,  B81B2201/0257 ,  H04R1/342 ,  H04R19/04 ,  H04R2201/003

Abstract: To provide an insulator, which supports a fixed pole in a unidirectional condenser microphone in a shareable manner among microphones that are different in the distance between acoustic terminals from one another. Coarse adjustment is performed on an insulator 31 including a plurality of sound holes 32 drilled therein by acoustically closing a predetermined sound hole 32 among the plurality of sound holes 32 by a predetermined sound hole closing means, and fine adjustment is performed by applying a predetermined amount of compressive force to an acoustic resistance member 40 by an acoustic resistance adjusting means 50 (adjustment nut 51), so as to adjust acoustic resistance present in a sound wave passage from a rear acoustic terminal to the back of a diaphragm.

Abstract translation: 为了提供一种绝缘体，其在单向电容式麦克风之间以可分离的方式支撑固定极，所述麦克风彼此之间的距离不同。 通过预定的声孔关闭装置通过声音闭合多个声孔32中的预定声孔32，在包括多个在其中钻出的多个声孔32的绝缘体31上进行粗调整，并且通过施加预定量进行微调 通过声阻调节装置50（调节螺母51）向声阻元件40施加压缩力，以便调节从后声接头到隔膜背面的声波通道中存在的声阻。

公开(公告)号：US20170142526A1

公开(公告)日：2017-05-18

申请号：US15283608

申请日：2016-10-03

Applicant: KABUSHIKI KAISHA AUDIO-TECHNICA

Inventor： Satoshi YOSHINO ,  Hiroaki FURUYA

IPC: H04R19/04 ,  H04R31/00 ,  H04R1/04

CPC classification number: H04R19/04 ,  H04R1/021 ,  H04R1/04 ,  H04R19/00 ,  H04R31/006

Abstract: A condenser microphone is provided that can ensure the fixation of an electroacoustic transducer inside a unit case and the grounding of the electroacoustic transducer, regardless of variations in manufacture of the unit case and a circuit board. A condenser microphone unit includes an electroacoustic transducer and a unit case accommodating the electroacoustic transducer. The unit case includes at least one protrusion that is disposed on the inner circumferential surface of the unit case. The electroacoustic transducer is fixed inside the unit case with the protrusion.