公开(公告)号：JPH04356895A

公开(公告)日：1992-12-10

申请号：JP6786691

申请日：1991-03-07

Applicant: YAMAHA CORP

Inventor： NORO MASAO

IPC: H04Q9/00

Abstract: PURPOSE:To secure required band width, to obtain a sharp cut-OFF characteristic and to improve an S/N at a remote control signal repeating device such as a repeater or the like. CONSTITUTION:A band pass filter circuit 18 is constituted by inserting a parallel LC resonance circuit 34 and a serial LC resonance circuit 36 to the supplying route of photodetected signals. The resonance frequencies of the both resonance circuits 34 and 36 are set almost equal. Thus, at a point A, resonance having two peaks on the both sides of the resonance frequency (35kHz) due to original C1 and L1 can be obtained. At a point B, a serial resonance characteristic due to C2 and L3 is added to this resonance, and the above-mentioned two peaks are made flat. Out of the band, the cut-OFF characteristic to be sharply lowered can be obtained.

公开(公告)号：JPH0458111B2

公开(公告)日：1992-09-16

申请号：JP25604885

申请日：1985-11-15

Applicant: YAMAHA CORP

Inventor： NORO MASAO ,  KUMAOKA MICHIAKI

IPC: G11B5/02 ,  G11B20/00 ,  G11B20/02

公开(公告)号：JPH03201710A

公开(公告)日：1991-09-03

申请号：JP34035889

申请日：1989-12-28

Applicant: YAMAHA CORP

Inventor： NORO MASAO

IPC: H03F1/02 ,  H03F3/20

Abstract: PURPOSE:To reduce the number of components and to simplify the constitution by using a power supply switching means 1 to change over a high voltage power supply and a low voltage power supply, and supplying a selected power supply to a large power amplifier in response to a signal amplitude, and supplying power supply to a small output amplifier from the low voltage power supply. CONSTITUTION:Power supply changeover means 22, 24 are used to supply power from a high voltage power supply 40 to large output amplifiers A-C when they requires the high voltage power supply 40 in response to the level of an amplified signal and power is supplied from a low voltage power supply 42 when the low voltage power supply 42 is enough. Moreover, the power is supplied from the low voltage power supply 42 to a small output amplifier without changing over the power supply. Thus, the power supply changeover system is adopted for the large output amplifiers to reduce the loss and to attain high efficiency, and the low voltage power supply at a small amplitude in the large output amplifiers is used in common for the power supply of the small output amplifier to simplify the constitution of the power supplies.

公开(公告)号：JPH0314397A

公开(公告)日：1991-01-23

申请号：JP14997889

申请日：1989-06-13

Applicant: YAMAHA CORP

Inventor： NORO MASAO

IPC: H04Q9/00

Abstract: PURPOSE:To attain the remote control transmission from a room or place separated from a room installing an audio equipment, an AV equipment or the like by transmitting a remote control signal through a speaker cable. CONSTITUTION:A remote control(RC) signal transmitted from an RC transmitter 20 is detected by a photodetecting part 22, supplied from an RC signal input part 16 to the speaker cable 12 and transmitted through the cable 12. The RC signal transmitted through the cable 12 is extracted by an RC signal output part 18 and sent to an equipment for inputting the RC signal to execute commanded operation contents. Since the RC signal is transmitted through the cable 12, RC transmission can be attained from a room or place separated from the room installing an audio equipment or an AV equipment.

公开(公告)号：JPH01296797A

公开(公告)日：1989-11-30

申请号：JP12563888

申请日：1988-05-25

Applicant: YAMAHA CORP

Inventor： NORO MASAO

IPC: H04R1/28

Abstract: PURPOSE:To make the equipment small in size and to improve the degree of freedom of design by giving a negative output impedance around a frequency relating to sound pressure among plural resonance frequencies formed by a resonator and a vibrator to a drive means. CONSTITUTION:A cabinet 1 is made small in size and opening ports 3a, 3b difficult to be contained in the cabinet 1 are provided projectingly at the outside of the cabinet 1. Then a driver 30 including a negative impedance in the output impedance at least at a frequency in resonance frequencies f2, f4 relating to sound pressure output among 5 resonance frequencies f1-f5 as drivers to drive a vibrator (speaker unit) 5 mounted to a partition plate 2 is used. Since the Q value in the resonance frequencies is set to a proper value to obtain proper sound pressure characteristic, the degree of freedom of design is improved and the size of the cabinet is made small.

公开(公告)号：JP2014137418A

公开(公告)日：2014-07-28

申请号：JP2013004833

申请日：2013-01-15

Applicant: Yamaha Corp ,  ヤマハ株式会社

Inventor： SUENAGA YUICHIRO ,  TAMURA SHINYA ,  NORO MASAO

IPC: G10H3/18 ,  G10H1/32

CPC classification number: G10H3/18 ,  G10D1/085 ,  G10D3/02 ,  G10D3/04 ,  G10H3/14 ,  G10H3/181 ,  G10H3/182 ,  G10H3/185 ,  G10H2220/471 ,  Y10T29/42

Abstract: PROBLEM TO BE SOLVED: To make a stringed instrument sound emitted by an electric stringed instrument having no resonance body close to an instrument sound emitted by a normal acoustic stringed instrument.SOLUTION: An electric stringed instrument includes a body 11 supporting strings 14 through a piece 12, and a pickup sensor 16 positioned near the piece 12 and picking up vibrations transmitted from the string 14. A piece support member 13 constituting a plate spring elastically supports the piece 12 by being fixed to the body 11. A damper comprising a plate spring 17 and a weight 18 is fixed to the piece support member 13.

Abstract translation: 要解决的问题：使由没有共振体的电弦乐器发出的弦乐器声音靠近由正常声弦乐器发出的乐器声音。电动弦乐器包括主体11，支撑琴弦14通过一片 12和位于片12附近的拾取传感器16，并且拾取从弦线14传播的振动。构成板簧的片状支撑构件13通过固定在主体11上弹性地支撑片12。 17和重物18固定在件支承件13上。

公开(公告)号：JP2012080530A

公开(公告)日：2012-04-19

申请号：JP2011195271

申请日：2011-09-07

Applicant: Yamaha Corp ,  ヤマハ株式会社

Inventor： YAMASHITA MASAYOSHI ,  NORO MASAO

IPC: H04R19/02 ,  H04R19/04

Abstract: PROBLEM TO BE SOLVED: To easily emit sound generated in a vibrator to the outside when used as an electrostatic type speaker and to easily convert sound generated outside to acoustic signals when used as an electrostatic type microphone, in an electrostatic type electroacoustic transducer.SOLUTION: Electrodes 20U and 20L are positioned holding an air-permeable separation member 10 therebetween, and elastic members 30U and 30L having elasticity and insulation quality are positioned on the outer side of the electrodes 20U and 20L. Then, on the outer side of the elastic members 30U and 30L, vibrators 40U and 40L for which a conductive film is formed on a surface of a film having the insulation quality are positioned. The electrode 20U and the electrode 20L are configured so as not to be easily displaced by external force compared to the vibrators 40.

Abstract translation: 要解决的问题：当用作静电型扬声器时，为了容易地将振动器中产生的声音发射到外部，并且当用作静电型麦克风时，容易将外部产生的声音转换为声学信号，在静电型电声换能器 。 解决方案：电极20U和20L定位在其间保持透气分离构件10，并且具有弹性和绝缘品质的弹性构件30U和30L位于电极20U和20L的外侧上。 然后，在弹性部件30U，30L的外侧，在具有绝缘品质的膜的表面上形成有导电膜的振动器40U，40L。 电极20U和电极20L被构造成与振动器40相比不容易被外力移位。版权所有：（C）2012，JPO＆INPIT

公开(公告)号：JP2007110264A

公开(公告)日：2007-04-26

申请号：JP2005296967

申请日：2005-10-11

Applicant: Yamaha Corp ,  ヤマハ株式会社

Inventor： ARAI AKIRA ,  NORO MASAO

IPC: H04R1/02

Abstract: PROBLEM TO BE SOLVED: To increase the low band and output the increased low sound component, even if a speaker enclosure is small.
SOLUTION: When a speaker 10 is driven, the vibrations of cone paper of the speaker 10 are propagated to the air in the speaker enclosure 90, and a vibration region 91a of a diaphragm 91 is vibrated by the vibrations of the air. Since the diaphragm 91 has long distance from a fulcrum to a free end, it is likely to be slowly bent. As a result, a material can be used with so proper hardness as to hardly cause high order resonation or partial vibration. Also, since a distance from the upper part of an edge 40 to the fulcrum (supporter 90c) is long, the upper part of the edge 40 can vibrate at a large amplitude and an air exhaust quantity is increased. Since the sound pressure generated by the diaphragm 91 is proportional to the quantity of air exhausted from the diaphragm 91, a higher maximum sound pressure can be generated when an actuator using the edge of the same size is used, and the sound pressure of a low band to be generated becomes high.
COPYRIGHT: (C)2007,JPO&INPIT

Abstract translation: 要解决的问题：即使扬声器外壳小，增加低频段并输出增加的低音分量。 解决方案：当扬声器10被驱动时，扬声器10的锥形纸的振动传播到扬声器外壳90中的空气，并且隔膜91的振动区域91a被空气的振动振动。 由于隔膜91从支点到自由端具有长距离，所以可能缓慢弯曲。 结果，可以使用具有如此适当硬度的材料，以致难以引起高阶谐振或部分振动。 此外，由于从边缘40的上部到支点（支撑件90c）的距离较长，所以边缘40的上部能够以大的振幅振动并且排气量增加。 由于隔膜91产生的声压与从隔膜91排出的空气量成比例，所以当使用相同尺寸的边缘的致动器时，可以产生更高的最大声压，并且声压低 要产生的频带变高。 版权所有（C）2007，JPO＆INPIT

公开(公告)号：JP2006129199A

公开(公告)日：2006-05-18

申请号：JP2004316185

申请日：2004-10-29

Applicant: Yamaha Corp ,  ヤマハ株式会社

Inventor： NORO MASAO

IPC: H04R1/28 ,  H04R1/02 ,  H04R3/00 ,  H04R3/12 ,  H04S5/02

CPC classification number: H04R1/2819 ,  H04S1/002 ,  H04S2400/01 ,  H04S2400/07

Abstract: PROBLEM TO BE SOLVED: To allow a base sound zone to be reproduced in a flat characteristic using a speaker housed in a resonant-structure enclosure. SOLUTION: A speaker system is made up by using a plurality of the speakers housed in a bass-reflex-structure enclosure. By differentiating a volume of each speaker enclosure, each enclosure is designed so as to have a mutually different bass-resonant frequency. While audio signals of separate channels are input to each speaker, only the bass-sound-zone signals of all channels are combined to be supplied to all the speakers. As a result, due to mutually different bass-resonant frequencies, the bass sound is reproduced with a flat characteristic. COPYRIGHT: (C)2006,JPO&NCIPI

Abstract translation: 要解决的问题：允许使用容纳在共振结构外壳中的扬声器以平坦特性再现基本声音区域。 解决方案：扬声器系统通过使用容纳在低音反射结构外壳中的多个扬声器来构成。 通过区分每个扬声器外壳的音量，每个外壳设计成具有相互不同的低音谐振频率。 虽然单独声道的音频信号被输入到每个扬声器，但是仅将所有声道的低音声带信号组合以提供给所有扬声器。 结果，由于相互不同的低音谐振频率，以平坦的特性再现低音。 版权所有（C）2006，JPO＆NCIPI

公开(公告)号：JP2006101683A

公开(公告)日：2006-04-13

申请号：JP2004288205

申请日：2004-09-30

Applicant: Yamaha Corp ,  ヤマハ株式会社

Inventor： NORO MASAO ,  SHIMIZU TAKANORI

IPC: H02M7/06

Abstract: PROBLEM TO BE SOLVED: To provide a power supply limiter circuit capable of suppressing fluctuations in a secondary-side voltage with the fluctuation in load, when the light load is applied to a power supply apparatus equipped with a low-frequency power supply transformer.
SOLUTION: An opening/closing element (FET) 11 turning on/off the connection between a bridge diode 5 and an electrolytic capacitor 6 and a power supply limiter circuit 1, including a control circuit 13 for controlling the opening/closing element 11 are provided between the secondary-side bridge diode 5 of the power supply apparatus 2 equipped with a low-frequency power supply transformer 4 and the electrolytic capacitor 6. The power supply limiter circuit 1 turns the FET 11 on/off, to control the load voltage to be constant at light-load time, when the load is light and the current necessary for driving the load 10 is small; whereas it supplies power to the load 10 by making good use of the characteristics of the low-frequency power supply transformer 4 which is lowered in the load voltage in proportion to the load current, without limiting the load voltage, at heavy-load time, when the load is heavy and sufficient current for driving the load 10 is required. Since the load voltage is constant at light-load, the cost of utilization components and installation space is suppressed.
COPYRIGHT: (C)2006,JPO&NCIPI

Abstract translation: 要解决的问题：为了提供能够抑制负载波动的次级侧电压的波动的电源限制电路，当将轻负载施加到配备有低频电源的电源装置 变压器。 解决方案：打开/关闭桥二极管5和电解电容器6之间的连接的开/闭元件（FET）11和电源限制器电路1，包括用于控制开闭元件的控制电路13 11设置在配备有低频电源变压器4的电源装置2的二次侧桥式二极管5和电解电容器6之间。电源限制电路1使FET 11接通/断开，以控制 当负载较轻且负载驱动所需的电流小时，负载电压在轻负载时恒定; 而通过充分利用与负载电流成比例的负载电压降低的低频电源变压器4的特性，而不限制负载电压，在重负载时，向负载10供电， 当负载很重时，需要足够的用于驱动负载10的电流。 由于负载电压在轻负载时恒定，所以利用部件的成本和安装空间被抑制。 版权所有（C）2006，JPO＆NCIPI