公开(公告)号：US20110260875A1

公开(公告)日：2011-10-27

申请号：US12764159

申请日：2010-04-21

申请人： Ronaldus Maria AARTS ,  Joris Adelbert Maria NIEUWENDIJK ,  Okke OUWELTJES

发明人： Ronaldus Maria AARTS ,  Joris Adelbert Maria NIEUWENDIJK ,  Okke OUWELTJES

IPC分类号： G08B21/00 ,  H04R1/02 ,  G08B3/00

CPC分类号： G08B17/00 ,  G08B3/02 ,  H04R1/2842

摘要： An alert device and method include an elongated cavity (306) and a loudspeaker (302) coupled to a first end portion of the cavity wherein sound produced by the loudspeaker is directed through the cavity to provide an audible sound. The cavity and the loudspeaker are configured and dimensioned to provide the audible sound substantially at an anti-resonant frequency (Fb) between first and second resonant frequency peaks for system impedance in a response spectrum for the loudspeaker and the cavity.

摘要翻译： 警报装置和方法包括耦合到腔的第一端部的细长空腔（306）和扬声器（302），其中由扬声器产生的声音被引导通过空腔以提供可听见的声音。 空腔和扬声器的构造和尺寸被设计成在用于扬声器和空腔的响应频谱中的系统阻抗的第一和第二谐振频率峰值之间基本上具有反谐振频率（Fb）的声音。

公开(公告)号：US20100018675A1

公开(公告)日：2010-01-28

申请号：US12515999

申请日：2007-11-27

申请人： Ronaldus Maria Aarts ,  Joris Adelbert Maria NIEUWENDIJK ,  Antonius Johannes Jo Wismans

发明人： Ronaldus Maria Aarts ,  Joris Adelbert Maria NIEUWENDIJK ,  Antonius Johannes Jo Wismans

IPC分类号： F28D15/00

CPC分类号： H01L23/467 ,  H01L23/4735 ,  H01L2924/0002 ,  H01L2924/3011 ,  H01L2924/00

摘要： A cooling device comprising at least one transducer (1) having a membrane adapted to generate pressure waves at a working frequency, characterized by a first and a second cavity (3, 4), said transducer being arranged between said first and second cavities, such that said membrane forms an fluid tight seal between said cavities, each cavity having at least one opening (7, 8) adapted to emit a pulsating net output fluid flow, wherein said cavities and openings are formed such that, at said working frequency, a first harmonic fluid flow emitted by said opening(s) (7) of a first one of said cavities is in anti-phase with a second harmonic fluid flow emitted by said opening(s) (8) of a second one of said cavities, so that a sum of harmonic fluid flow from said openings is essentially zero. With this design, sound reproduction at the working frequency is largely cancelled due to the counter phase of the outlets resulting in a close to zero far-field volume velocity.

摘要翻译： 一种冷却装置，包括至少一个换能器（1），其具有适于产生工作频率的压力波的膜，其特征在于第一和第二腔（3,4），所述换能器布置在所述第一和第二腔之间， 所述膜在所述空腔之间形成流体密封的密封，每个空腔具有适于发射脉动净输出流体流的至少一个开口（7,8），其中所述空腔和开口形成为使得在所述工作频率下， 由第一个所述空腔的所述开口（7）发射的一次谐波流体流与由所述空腔中的第二个所述开口（8）发射的二次谐波流体流反相， 使得来自所述开口的谐波流体的总和基本为零。 通过这种设计，由于出口的相对相位导致接近于零的远场体积速度，工作频率下的声音再现被大大地消除。