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公开(公告)号：US06756883B2
公开(公告)日：2004-06-29
申请号：US10293957
申请日：2002-11-12
IPC分类号： G08B300
CPC分类号： G08B3/10
摘要： The invention is an improved piezoelectric noise-making and audible signaling device which produces a distinctive 2 KHz tone that is more pronounced and significantly easier to perceive, especially in a noisy environment. The volume of the audible tone is amplified by using two or three sound-amplifying chambers or cavities.
摘要翻译： 本发明是一种改进的压电噪声制作和听觉信号装置，其产生更显着和显着更容易感知的特别的2KHz音调，特别是在嘈杂的环境中。 通过使用两个或三个声音放大室或空腔来扩大声音的音量。
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公开(公告)号：US06512450B1
公开(公告)日：2003-01-28
申请号：US09488693
申请日：2000-01-20
IPC分类号： G08B300
CPC分类号： G08B3/10
摘要： The invention is an improved piezoelectric noise-making and audible signaling device which produces a distinctive 2 KHz tone that is more pronounced and significantly easier to perceive, especially in a noisy environment. The volume of the audible tone is amplified by using two or three sound-amplifying chambers or cavities.
摘要翻译： 本发明是一种改进的压电噪声制作和听觉信号装置，其产生更显着和显着更容易感知的特别的2KHz音调，特别是在嘈杂的环境中。 通过使用两个或三个声音放大室或空腔来扩大声音的音量。
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公开(公告)号：US5793282A
公开(公告)日：1998-08-11
申请号：US432399
申请日：1995-05-01
CPC分类号： G10H1/26 , G10H2230/351
摘要： An electronic chime is created by a piezoelectric transducer with an exponentially decaying audio signal. The electronic chime has a power supply, an oscillator, a drive circuit, and a piezoelectric transducer. The drive circuit contains reactive components that function with the piezoelectric transducer to modulate the amplitude of the decaying audio signal. The amplitude modulated audio signal better simulates a mechanical chime.
摘要翻译： 由具有指数衰减音频信号的压电换能器产生电子钟。 电子钟有电源，振荡器，驱动电路和压电换能器。 驱动电路包含与压电换能器起作用的无功分量，以调制衰减音频信号的振幅。 幅度调制音频信号更好地模拟机械钟。
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公开(公告)号：US5675312A
公开(公告)日：1997-10-07
申请号：US561555
申请日：1995-11-21
申请人： George Alan Burnett
发明人： George Alan Burnett
IPC分类号： G08B3/10
CPC分类号： G08B3/10
摘要： An electronic audio circuit operates a piezoelectric audio transducer to produce a two-tone warbling audio output. The electronic circuit includes an integrated circuit double timer and integrated circuit logic gates. One timer produces a toggling frequency that operates a toggling circuit composed of a logic gate to electrically connect and disconnect an electrical component from a frequency determining network to produce two frequency determining networks. The other timer produces two tones depending upon which frequency determining network is electrically connected to the other timer. The two tone are buffered and then drive a two-element piezoelectric transducer.
摘要翻译： 电子音频电路操作压电音频换能器以产生双音扭动音频输出。 电子电路包括集成电路双重定时器和集成电路逻辑门。 一个定时器产生切换频率，其操作由逻辑门组成的切换电路，以将电气部件与频率确定网络电连接并断开以产生两个频率确定网络。 另一个定时器根据哪个频率确定网络电连接到另一个定时器产生两个音调。 两个音调被缓冲，然后驱动一个双元件压电换能器。
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公开(公告)号：US5675311A
公开(公告)日：1997-10-07
申请号：US458333
申请日：1995-06-02
CPC分类号： G08B3/10
摘要： An audio signal is generated that sweeps from a lower frequency to a higher frequency in a substantially linear function. The circuit used to produce this sweeping audio frequency has a stable power supply, a square wave oscillator, a ramp generator, a voltage controlled oscillator, a drive circuit and an audio circuit. The square wave generator is composed of logic gates that generate a square wave with near instantaneous rising and falling edges. The ramp generator creates a sweep drive signal that is a substantially linear triangular waveform.
摘要翻译： 产生在基本线性函数中从较低频率扫描到较高频率的音频信号。 用于产生这种扫频音频的电路具有稳定的电源，方波振荡器，斜坡发生器，压控振荡器，驱动电路和音频电路。 方波发生器由产生具有近瞬时上升沿和下降沿的方波的逻辑门组成。 斜坡发生器产生扫描驱动信号，该扫描驱动信号是基本线性的三角波形。
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