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1. 发明授权

US09648418B2 Active noise cancellation apparatus 有权
公开(公告)号：US09648418B2
公开(公告)日：2017-05-09
申请号：US14456338
申请日：2014-08-11
申请人： TOKAI RUBBER INDUSTRIES, LTD.
发明人： Hiroshi Iwamoto , Kouichi Hasegawa , Mitsuyoshi Kondo , Naoya Oue
IPC分类号： H04R3/00 , F16F7/10 , G10K11/178
CPC分类号： H04R3/002 , F16F7/1011 , G10K11/178 , G10K11/17879 , G10K2210/1282 , G10K2210/1291 , G10K2210/3211
摘要： Provided is an active noise cancellation apparatus capable of reliably reducing road noise by reducing vibration of a vehicle component part which generates road noise by using a vibration generator. A plurality of reference signal detectors are placed respectively on right and left knuckles for respectively supporting right and left wheels. A vibration generator and an error signal detector are placed on a vehicle component part. A controller performs respective adaptive controls based on each of reference signals and an error signal so as to reduce the error signal, and controls the vibration generator based on a sum of respective output values of the adaptive controls.

2. 发明授权

US08958581B2 Polymer speaker 有权
标题翻译：聚合物扬声器
公开(公告)号：US08958581B2
公开(公告)日：2015-02-17
申请号：US14016621
申请日：2013-09-03
申请人： Tokai Rubber Industries, Ltd.
发明人： Takamasa Ito , Hitoshi Yoshikawa , Mitsuyoshi Kondo , Katsuhiko Nakano
IPC分类号： H04R17/00 , C08L101/00 , H04R19/02 , C08L101/10
CPC分类号： H04R17/00 , C08L101/00 , C08L101/10 , H04R17/005 , H04R19/02
摘要： A polymer speaker is configured to include an electrostrictive element having an elastomer or resin dielectric layer and a plurality of electrode layers arranged on the front and back surfaces of the dielectric layer. The electrode layers are formed from a conductive material including a polymer binder and a conductor and having a modulus of elasticity of 100 MPa or less. The spring constant of the electrode layers in the surface direction is smaller than the spring constant of the dielectric layer in the surface direction. The volume resistivity of the electrode layers is 200 Ω·cm or less. The polymer speaker provides a practical sound pressure in a wide frequency region from low frequencies to high frequencies.
摘要翻译：聚合物扬声器被配置为包括具有弹性体或树脂电介质层的电致伸缩元件和布置在电介质层的前表面和后表面上的多个电极层。电极层由包含聚合物粘合剂和导体的导电材料形成，弹性模量为100MPa以下。电极层的表面方向的弹簧常数小于电介质层在表面方向上的弹簧常数。电极层的体积电阻率为200ΩΩ·cm以下。聚合物扬声器在从低频到高频的宽频率区域中提供实用的声压。

3. 发明授权

US09288583B2 Speaker 有权
标题翻译：扬声器
公开(公告)号：US09288583B2
公开(公告)日：2016-03-15
申请号：US14325831
申请日：2014-07-08
申请人： TOKAI RUBBER INDUSTRIES, LTD.
发明人： Katsuhiko Nakano , Mitsuyoshi Kondo
IPC分类号： H04R25/00 , H04R19/02 , H04R7/06
CPC分类号： H04R19/02 , H04R7/06
摘要： A speaker includes: a pair of front-side and back-side vibration portions each having a dielectric layer having insulating properties and made of an elastomer or resin, a front-side electrode layer placed on a front side of the dielectric layer and having conductive properties, and a back-side electrode layer placed on a back side of the dielectric layer and having conductive properties; an interposed member placed between the pair of vibration portions so that the front-side vibration portion protrudes toward a front side and the back-side vibration portion protrudes toward a back side; and a circuit section that transmits signal waves based on sound to be reproduced to the pair of vibration portions so that the signal waves transmitted to the pair of vibration portions have opposite phases to each other, and drives the pair of vibration portions.
摘要翻译：扬声器包括：一对前侧振动部和后侧振动部，其各自具有绝缘性的电介质层，由弹性体或树脂制成，前侧电极层配置在电介质层的前侧，具有导电性以及放置在电介质层的背面并具有导电性能的背面电极层; 放置在所述一对振动部之间的插入部件，使得所述前侧振动部朝向前侧突出，所述后侧振动部朝向背侧突出; 以及电路部，其将基于要再现的声音的信号波发送到所述一对振动部，使得传递到所述一对振动部的信号波具有相反的相位，并且驱动所述一对振动部。

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