公开(公告)号：JPH01272298A

公开(公告)日：1989-10-31

申请号：JP10021688

申请日：1988-04-25

Applicant: YAMAHA CORP

Inventor： NORO MASAO

IPC: H04R1/28 ,  H04R3/04

Abstract: PURPOSE:To reduce an adverse effect due to a non-motional impedance by defining an output impedance in the vicinity of a resonance frequency relating to a sound pressure in the actual using state of a converter to be negative and setting the output impedance of a band which cannot neglect an influence applied to a sound quality by the non-motional impedance to zero or positive. CONSTITUTION:At the time of driving an electro-acoustic converter, the converter is driven by the negative impedance R0 in the vicinity of the resonance frequency f0 relating to at least of the sound pressure of the resonance frequency f0 in the actual using state of this converter. In the band which cannot neglect the influence applied to the sound quality by the non-motional impedance of the converter, it is driven by the zero or positive impedance. Thereby, the adverse influence to the sound quality by said impedance by the non-motional impedance of the converter can be made equal to or lower than a general constant voltage driving system.

公开(公告)号：JPH01272297A

公开(公告)日：1989-10-31

申请号：JP10021588

申请日：1988-04-25

Applicant: YAMAHA CORP

Inventor： NORO MASAO

IPC: H04R1/28 ,  H04R3/04

Abstract: PURPOSE:To attain the improvement of the performance of a system by disposing an oscillator in a cabinet having a resonance opening, defining one of the impedance to be a negative impedance and providing mutually output impedance values. CONSTITUTION:At the time of driving the oscillator of an acoustic device for disposing the oscillator in the cabinet having the resonance opening, in a first resonance frequency f1 determined by a substantial oscillator and the cabinet and a second resonance frequency f2 determined substantially by the oscillator and the cabinet and the resonance opening, driving impedances Z1, Z2 are defined to be both negative values or Z1 Z2 or define one of Z1, Z2 to be zero or a positive value and the other to be a negative. Accordingly, the resonance frequency can be independently set. Namely, for instance, the speaker system can be designed irrespective of the restriction of an ordinary bus reflecting type. Thereby, system performance can be improved.

公开(公告)号：JPS6367437B2

公开(公告)日：1988-12-26

申请号：JP4277581

申请日：1981-03-24

Applicant: YAMAHA CORP

Inventor： NORO MASAO

IPC: H02M7/06 ,  H02M7/12 ,  H02M7/155 ,  H02M7/21 ,  H02M7/217 ,  H02M7/48

公开(公告)号：JPS6366443B2

公开(公告)日：1988-12-20

申请号：JP21148081

申请日：1981-12-25

Applicant: YAMAHA CORP

Inventor： NORO MASAO

IPC: H03F1/02 ,  H03F3/30

公开(公告)号：JP2015026907A

公开(公告)日：2015-02-05

申请号：JP2013153808

申请日：2013-07-24

Applicant: ヤマハ株式会社 ,  Yamaha Corp

Inventor： TAKIGAWA SOICHI ,  NORO MASAO ,  MIYAKE YOSHIRO

IPC: H04R1/24 ,  H04R1/28 ,  H04R7/04 ,  H04R19/02

Abstract: 【課題】平面スピーカの低音域の音圧レベルを向上させながらも持ち運びが容易であるスピーカ装置を提供する。【解決手段】共鳴管21の内部にスピーカユニット14を設けてサブウーファを構成する。スピーカユニット14の背面から出力された音は、共鳴管21で低音域で共鳴し、平面スピーカ18が出力できない低音域の音圧レベルを向上させることができる。また、共鳴管21は内部が空洞になっているため、平面スピーカ18を収納して持ち運ぶことができるようになっている。スピーカユニット14の背面には、保護構造物31を設ける。【選択図】図2

Abstract translation: 要解决的问题：提供可以容易地携带的扬声器，同时增强平板扬声器的低音声压级。解决方案：通过在谐振管21中提供扬声器单元14来构成次低音扬声器。 扬声器单元14的背面在谐振管21中以低频谐振，并且可以增强不能从平板扬声器18输出的低音声压级。此外，由于谐振管21的内部是空腔， 扁平扬声器18可以被容纳在一起。 保护结构31设置在扬声器单元14的背面。

公开(公告)号：JP2010228564A

公开(公告)日：2010-10-14

申请号：JP2009077602

申请日：2009-03-26

Applicant: Yamaha Corp ,  ヤマハ株式会社

Inventor： NORO MASAO

IPC: B60K6/48 ,  B60K6/22 ,  B60L3/00 ,  B60Q5/00 ,  B60R11/02 ,  B60W10/00 ,  B60W20/00

CPC classification number: B60Q5/008

Abstract: PROBLEM TO BE SOLVED: To provide an automobile for alarming pedestrians with sounds so that the pedestrians definitely listen thereto while reducing noises therearound and improving the degree of freedom in designing the automobile body. SOLUTION: The automobile 1 outputs sounds relating to audio signals when travelling with power generated by a motor, so that pedestrians listen thereto to recognize the automobile 1 to come therenear. At this time, a speaker array part 20 for releasing sounds with medium-to-high-frequency signals releases sounds toward the lower side of the automobile body 100 to reflect them from a travel plane 1000, and releases the sounds around the automobile body 100 while using the automobile body 100 for restricting a sound releasing route, so that the pedestrians on a ground effectively listen to the sounds to recognize the automobile 1 to come therenear. The degree of freedom in designing the automobile body 100 is improved. COPYRIGHT: (C)2011,JPO&INPIT

Abstract translation: 要解决的问题：提供一种具有声音的行人警报的汽车，以便行人绝对倾听，同时减少噪音，提高设计汽车车身的自由度。

解决方案：汽车1在通过电动机产生的动力行驶时输出与音频信号有关的声音，使得行人听从其识别汽车1到达那里。 此时，用于释放具有中高频信号的声音的扬声器阵列部分20向汽车车体100的下侧释放声音，以将它们从行驶平面1000反射，并且释放汽车车体100周围的声音 同时使用汽车车身100限制声音释放路线，使得地面上的行人有效地收听声音以识别汽车1到达那里。 提高了设计汽车车体100的自由度。 版权所有（C）2011，JPO＆INPIT

公开(公告)号：JP2007336337A

公开(公告)日：2007-12-27

申请号：JP2006167274

申请日：2006-06-16

Applicant: Yamaha Corp ,  ヤマハ株式会社

Inventor： NORO MASAO ,  ARAI AKIRA

IPC: H04R1/28 ,  H04R1/02

CPC classification number: H04R1/2834

Abstract: PROBLEM TO BE SOLVED: To reproduce a satisfactory low-pitched sound in the case of using a passive diaphragm in an oblong shape.
SOLUTION: When a speaker 10 is driven, air inside a speaker enclosure 30 is compressed or expanded, and diaphragms 31 and 32 vibrate in accordance with air compression or expansion. Since the bottom end of the diaphragm 31 is connected to the top end of the diaphragm 32 by a connection part 33, the diaphragm 31 and the diaphragm 32 are united to vibrate in a primary vibration mode with the top end of the diaphragm 31 and the bottom end of the diaphragm 32 as fixed ends.
COPYRIGHT: (C)2008,JPO&INPIT

Abstract translation: 要解决的问题：在使用长方形的被动隔膜的情况下，再现令人满意的低音声音。 解决方案：当扬声器10被驱动时，扬声器壳体30内的空气被压缩或膨胀，并且隔膜31和32根据空气压缩或膨胀而振动。 由于隔膜31的底端通过连接部分33连接到隔膜32的顶端，所以隔膜31和隔膜32联合起来，以振动膜31的顶端为主要振动模式， 隔膜32的底端为固定端。 版权所有（C）2008，JPO＆INPIT

公开(公告)号：JP2007209038A

公开(公告)日：2007-08-16

申请号：JP2007128657

申请日：2007-05-14

Applicant: Yamaha Corp ,  ヤマハ株式会社

Inventor： TSUJI NOBUAKI ,  NORO MASAO

IPC: H03F3/217

Abstract: PROBLEM TO BE SOLVED: To provide a power amplifier circuit using a PWM modulation circuit that prevents variations of the circuit gain.
SOLUTION: The PWM modulation circuit 10a comprises a comparator 11, and an integrator 20, whose integrated output is compared with an input signal from a signal source 16 via an amplifier 15 by the comparator 11 to produce a PWM signal having an advanced phase characteristic due to differentiation of the input signal. A switching circuit 21 amplifies the PWM modulation signal The amplified PWM modulation signal is supplied to a speaker 27 via an LC filter 26, and it is also negatively fed back to the input side of the PWM modulation circuit. In this case, a positive source voltage and a negative source voltage of the switching circuit 21 are respectively switched depending on an output of the comparator 11, and input terminals of the comparator 11 receives signals. Thus, variations in the circuit gain are prevented.
COPYRIGHT: (C)2007,JPO&INPIT

Abstract translation: 要解决的问题：提供使用防止电路增益变化的PWM调制电路的功率放大器电路。

解决方案：PWM调制电路10a包括比较器11和积分器20，其积分输出与比较器11经由放大器15与来自信号源16的输入信号进行比较，以产生具有高级 由于输入信号的差异导致的相位特性。 开关电路21对PWM调制信号进行放大。经过LC滤波器26将放大的PWM调制信号提供给扬声器27，并将其反馈回PWM调制电路的输入侧。 在这种情况下，根据比较器11的输出，切换电路21的正源电压和负电源电压分别切换，比较器11的输入端接收信号。 因此，防止电路增益的变化。 版权所有（C）2007，JPO＆INPIT

公开(公告)号：JP2007116471A

公开(公告)日：2007-05-10

申请号：JP2005306201

申请日：2005-10-20

Applicant: Yamaha Corp ,  ヤマハ株式会社

Inventor： NORO MASAO ,  ARAI AKIRA

IPC: H04R5/02 ,  H04S1/00 ,  H04S7/00

CPC classification number: H04R5/02 ,  H04R1/2834 ,  H04R2205/022

Abstract: PROBLEM TO BE SOLVED: To allow a sound field having a surround effect to be recognized from any direction with respect to a stereo audio device having left and right speakers provided together in one small-sized enclosure. SOLUTION: Two or more speakers which are provided in an internally closed speaker enclosure and have a common back space are divided into two groups, and a stereo left channel signal is supplied to speakers in one group, and a stereo right channel signal is supplied to speakers in the other group. The surround effect is given to stereo signals, and stereo right and left channel signals after giving of the surround effect are supplied to speakers in one group and speakers in the other group respectively. COPYRIGHT: (C)2007,JPO&INPIT

Abstract translation: 要解决的问题：为了允许从具有一个小型外壳中的左右扬声器的立体声音频设备的任何方向识别具有环绕效果的声场。 解决方案：设置在内部闭合的扬声器外壳中并具有公共后部空间的两个或更多个扬声器被分成两组，立体声左声道信号被提供给一组中的扬声器，立体声右声道信号 提供给另一组的扬声器。 环绕效果被赋予立体声信号，并且在给出环绕效果之后的立体声左和右声道信号分别被提供给一组中的扬声器和另一组中的扬声器。 版权所有（C）2007，JPO＆INPIT

公开(公告)号：JP2004297366A

公开(公告)日：2004-10-21

申请号：JP2003085888

申请日：2003-03-26

Applicant: Yamaha Corp ,  ヤマハ株式会社

Inventor： NORO MASAO

IPC: H03F3/68 ,  H03F1/34

Abstract: PROBLEM TO BE SOLVED: To provide an amplifier by which distortion is decreased by applying a secondary feedback to the amplifier and the operation does not become unstable.
SOLUTION: In an audio amplifier having a power amplifier A0 consisting of a voltage amplifier A3, and a first-stage voltage amplifier A1, and a second-stage current amplifier A2, an overall loop L1 and a minor loop L2 are formed from the output of the power amplifier A0. The minor loop L2 has a secondary time constant circuit connected to the inversion input terminal of the voltage amplifier A1 and the output terminal of the current amplifier A2. A ground-free second-stage resistor R4 is connected to the non-inversion input terminal of the voltage amplifier A1. Thus, the rotation of a signal phase at a high-frequency band is prevented.
COPYRIGHT: (C)2005,JPO&NCIPI