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    • 1. 发明申请
    • Audio frequency range adaptation
    • 音频范围适应
    • US20070098182A1
    • 2007-05-03
    • US10571637
    • 2004-08-31
    • Ronaldus AartsOkke OuweltjesDaniel Schobben
    • Ronaldus AartsOkke OuweltjesDaniel Schobben
    • H04R29/00H04R3/00
    • H04R3/04H04R29/001H04R2499/15
    • To improve the reproduction of audio signals, the signal components of a selected audio frequency range (1) of an audio signal are concentrated in a narrower audio frequency range (II). This is achieved by detecting first signal components in the first audio frequency range (I), generating second signal components in the second audio frequency range (II), and controlling the amplitude of the second signal components in response to the amplitude of the first signal components. As a result, dedicated transducers may be used which are particularly efficient in the narrower frequency range. The original frequency range (I) may contain the lower frequency signal components (bass components) of the audio signal.
    • 为了改善音频信号的再现,音频信号的选定音频范围(1)的信号分量集中在较窄的音频频率范围(II)中。 这通过检测第一音频频率范围(I)中的第一信号分量,产生第二音频范围(II)中的第二信号分量,并响应于第一信号的振幅来控制第二信号分量的振幅来实现 组件。 结果,可以使用在较窄频率范围内特别有效的专用换能器。 原始频率范围(I)可以包含音频信号的较低频率信号分量(低音分量)。
    • 2. 发明申请
    • Sound Enhancement
    • 声音增强
    • US20070237343A1
    • 2007-10-11
    • US11572576
    • 2005-07-26
    • Daniel SchobbenRonaldus AartsOkke Ouweltjes
    • Daniel SchobbenRonaldus AartsOkke Ouweltjes
    • H04R3/00
    • H04R3/04H04S1/002
    • A device (1) is arranged for adjusting the amplitude of an audio signal (x) such that the output of a transducer (2) coupled to the device is equivalent to the output of a reference transducer. The device comprises a first simulation unit (11) for producing a reference signal (y) in response to the audio signal (x), a second simulation unit (12) for producing a further signal (z) in response the audio signal (x), and comparator means (15) for comparing the reference signal (y) and the further signal (z) so as to produce an adjustment signal (a) which is fed to an adjustment unit (10). The first simulation unit (11) simulates the response of a reference transducer, while the second simulation unit (12) simulates the response of the actual transducer (2) to the audio signal (x).
    • 设置(1)用于调节音频信号(x)的幅度,使得耦合到该设备的换能器(2)的输出等同于参考换能器的输出。 该装置包括用于响应于音频信号(x)产生参考信号(y)的第一模拟单元(11),用于响应于音频信号(x)产生另外的信号(z)的第二模拟单元(12) )和比较装置(15),用于比较参考信号(y)和另外的信号(z),以产生馈送到调节单元(10)的调节信号(a)。 第一模拟单元(11)模拟参考换能器的响应,而第二模拟单元(12)模拟实际换能器(2)对音频信号(x)的响应。
    • 5. 发明授权
    • Low noise cooling device
    • 低噪音冷却装置
    • US08218318B2
    • 2012-07-10
    • US12746200
    • 2008-11-26
    • Ronaldus Maria AartsClemens Johannes Maria LasanceJoris Adelbert Maria NieuwendijkOkke Ouweltjes
    • Ronaldus Maria AartsClemens Johannes Maria LasanceJoris Adelbert Maria NieuwendijkOkke Ouweltjes
    • H05K7/20
    • F04D33/00F04F7/00
    • A cooling device (1) using pulsating fluid for cooling of an object, comprising: a transducer (2) having a membrane adapted to generate pressure waves at a working frequency (fw), and a cavity (4) enclosing a first side of the membrane. The cavity (4) has at least one opening (5) adapted to emit a pulsating net output fluid flow towards the object, wherein the opening (5) is in communication with a second side of the membrane. The cavity (4) is sufficiently small to prevent fluid in the cavity (4) from acting as a spring in a resonating mass-spring system in the working range. This is advantageous as a volume velocity (u1) at the opening is essentially equal to a volume velocity (u1′) at the second side of the membrane, apart from a minus sign. Thus, at the working frequency the pulsating net output fluid can be largely cancelled due to the counter phase with the pressure waves on the second side of the membrane resulting in a close to zero far-field volume velocity. Thus a low sound level is achieved, at a low cost, without requiring mechanical symmetry.
    • 一种使用用于冷却物体的脉动流体的冷却装置(1),包括:具有适于产生工作频率(fw)的压力波的膜的换能器(2)和包围所述第一侧的空腔(4) 膜。 空腔(4)具有至少一个开口(5),适于朝向物体发射脉动的净输出流体流,其中开口(5)与膜的第二侧连通。 空腔(4)足够小以防止空腔(4)中的流体在工作范围内作为共振质弹簧系统中的弹簧。 这是有利的,因为开口处的体积速度(u1)基本上等于膜的第二侧处的体积速度(u1'),除了负号。 因此,在工作频率下,脉动净输出流体由于与膜的第二侧上的压力波的相反相而可能被大大地消除,导致接近于零的远场体积速度。 因此,以低成本实现低声级,而不需要机械对称。
    • 10. 发明申请
    • DEVICE AND METHOD FOR ADAPTING AN AUDIO SIGNAL TO A TRANSDUCER UNIT
    • 用于将音频信号适配到传感器单元的装置和方法
    • US20100226508A1
    • 2010-09-09
    • US12161811
    • 2007-01-23
    • Ronaldus Maria AartsJoris Adelbert Maria NieuwendijkOkke Ouweltjes
    • Ronaldus Maria AartsJoris Adelbert Maria NieuwendijkOkke Ouweltjes
    • H03G5/00
    • H04R3/04
    • A device (30) for adapting an audio input signal (V1n) to a transducer unit (20) comprises: mapping means (10) for mapping input signal components from a first audio frequency range onto a second audio frequency range so as to produce a mapped audio signal (VM), wherein the second audio frequency range is narrower than the first audio frequency range, and wherein the transducer unit (20) has a maximum efficiency at the second audio frequency range, filter means (31) for filtering the input signal (V1n) so as to produce a filtered input signal (V1n′) having a third audio frequency range, and combination means (32) for combining the mapped audio signal (VM) and the filtered input signal (V1n′) so as to produce a transducer signal (VT). The first audio frequency range is preferably contained in the second audio frequency range, while the third audio frequency range may be adjacent the first audio frequency range. The second audio frequency range preferably extends within 5% of the Helmholtz frequency of the transducer unit (20).
    • 一种用于将音频输入信号(V1n)适配到换能器单元(20)的装置(30)包括:映射装置(10),用于将来自第一音频频率范围的输入信号分量映射到第二音频频率范围,以产生 映射的音频信号(VM),其中所述第二音频频率范围比所述第一音频频率范围窄,并且其中所述换能器单元(20)在所述第二音频频率范围具有最大效率,滤波器装置(31) 信号(V1n),以产生具有第三音频范围的滤波输入信号(V1n'),以及用于组合映射音频信号(VM)和滤波后的输入信号(V1n')的组合装置(32),以便 产生换能器信号(VT)。 第一音频范围优选地包含在第二音频范围中,而第三音频频率范围可以与第一音频范围相邻。 第二音频范围优选地在换能器单元(20)的亥姆霍兹频率的5%内。