公开(公告)号：US4586194A

公开(公告)日：1986-04-29

申请号：US576476

申请日：1984-02-02

申请人： Makoto Kohashi ,  Tanetoshi Miura ,  Kaoru Okabe ,  Haruo Hamada

发明人： Makoto Kohashi ,  Tanetoshi Miura ,  Kaoru Okabe ,  Haruo Hamada

IPC分类号： H04R25/04 ,  H04R25/00 ,  H04R29/00

CPC分类号： H04R29/001 ,  H04R25/30

摘要： An earphone characteristic measuring device comprises an acoustic coupler having an acoustic tube simulated to an external auditory canal in which an earphone under measurement is to be inserted and an acoustic tube of a smaller diameter having an acoustic impedance of approximately 320 ohms connected to an end of the first acoustic tube, a sound source for emitting an impulse sound to the acoustic coupler, a microphone mounted at the end of the first acoustic tube for picking up sound pressure information and a characteristic calculation circuit for transforming an earphone characteristic of the acoustic coupler to an earphone characteristic of a real ear based on an input impedance of the acoustic coupler viewed from an end of the earphone inserted in the acoustic coupler and an input impedance of the real ear represented by a sum of an eardrum impedance of the real ear and an external auditory canal volume of the real ear, stored in a memory in response to the sound pressure information from the microphone. The use of the acoustic coupler of a simple structure facilitates the measurement of a vent characteristic of the earphone and an insertion gain and improves reliability of the measurement.

摘要翻译： 耳机特性测量装置包括声耦合器，该声耦合器具有模拟到外耳道的声管，其中待插入的耳机将被插入，声管阻抗约为320欧姆的较小直径的声管连接到 第一声​​管，用于向声耦合器发射脉冲声音的声源，安装在第一声管的端部处用于拾取声压信息的麦克风和用于将声耦合器的耳机特性变换的特性计算电路转换为 基于从插入在声耦合器中的耳机的端部观察的基于声耦合器的输入阻抗的真实耳朵的耳机特性和由真耳朵的鼓膜阻抗之和表示的真耳朵的输入阻抗 外耳道体积的耳朵，存储在记忆中，以响应声压信息 从麦克风。 使用简单结构的声耦合器便于测量耳机的通风特性和插入增益，并提高了测量的可靠性。

公开(公告)号：US3935925A

公开(公告)日：1976-02-03

申请号：US412154

申请日：1973-11-02

申请人： Kenji Koiwa ,  Makoto Kohashi

发明人： Kenji Koiwa ,  Makoto Kohashi

IPC分类号： G10K11/28 ,  H04R1/30 ,  G10K11/00

CPC分类号： G10K11/28 ,  H04R1/30

摘要： A horn speaker having wide directional characteristics in accordance with the present invention provides a horn having a horn wall the shape of which is formed by connecting a plurality of curves having different flaring constants. The flaring constant of the curve forming a mouth portion of the horn wall is selected so as to be greater than that of the curve forming a throat portion thereof. The mouth portion of the horn wall is shaped so as to have a flaring angle which is formed by the curve at the mouth portion and has no abrupt variation of angle to a baffle plate. The curve at the mouth portion is connected with the curve at the horn wall nearer to the throat portion and having the flaring constant different therefrom at a point at which the differential coefficients of the respective curves substantially coincide with each other.

摘要翻译： 根据本发明的具有宽方向特性的喇叭扬声器提供了具有喇叭壁的喇叭，喇叭的形状通过连接具有不同扩口常数的多个曲线而形成。 选择形成喇叭口的口部的曲线的扩口常数大于形成其喉部的曲线的扩张常数。 喇叭口的口部成形为具有由口部的曲线形成的扩张角，并且与挡板的角度没有突然变化。 嘴部处的曲线与喇叭壁处的曲线连接，在更靠近喉部的喇叭壁处，并且在相应曲线的微分系数基本上彼此重合的点处具有与其不同的扩口常数。

公开(公告)号：US4653103A

公开(公告)日：1987-03-24

申请号：US826249

申请日：1986-02-05

申请人： Tohru Mori ,  Makoto Kohashi ,  Yoshio Ariki

发明人： Tohru Mori ,  Makoto Kohashi ,  Yoshio Ariki

IPC分类号： H04R3/04 ,  H04R1/24 ,  H04R9/04 ,  H04R9/00

CPC分类号： H04R9/047

摘要： In a planar loudspeaker structure comprising planar membrane for forming a diaphragm on which a voice coil of a conductor pattern is formed, and a magnetic circuit for supplying a DC magnetic flux which crosses the voice coil, the conductor pattern includes first and second zigzag conductor pattern portions which are juxtaposed on substantially the entire area of the membrane and connected in series. Opposite ends of the series connection of the first and second conductor pattern portions are respectively connected to first and second terminals for receiving a low-band component of an input audio signal. A high-band component of the input signal is applied to a third terminal connected to a junction between the first and second conductor pattern portions and supplied only to the second conductor pattern portion. The voice coil having the first and second zigzag conductor pattern portions is driven in a multi-drive fashion by driving forces which are weighted relative to each other so as to provide a flat sound pressure/frequency characteristic and a flat electrical impedance characteristic. In addition, the radiation area of the diaphragm is partly weighted by the disposition of the first and second zigzag conductor pattern portions so that the entirety of the membrane is vibrated in a low band and a portion of the membrane is vibrated in a high band, thereby improving the directivity characteristic.

摘要翻译： 在包括用于形成其上形成有导体图案的音圈的隔膜的平面膜的平面扬声器结构和用于提供穿过音圈的DC磁通的磁路中，导体图案包括第一和第二之字形导体图案 这些部分并置在膜的基本上整个区域上并串联连接。 第一和第二导体图案部分的串联连接的相对端分别连接到用于接收输入音频信号的低频分量的第一和第二端子。 输入信号的高频分量被施加到连接到第一和第二导体图形部分之间的结点并仅供给第二导体图形部分的第三端子。 具有第一和第二曲折导体图形部分的音圈通过相对于彼此加权的驱动力以多驱动方式被驱动，以提供平坦的声压/频率特性和平坦的电阻抗特性。 此外，通过第一和第二之字形导体图形部分的布置，隔膜的辐射面积被部分地加权，使得整个膜在低带振动并且膜的一部分在高频带中振动， 从而提高方向特性。