公开(公告)号：US20060280315A1

公开(公告)日：2006-12-14

申请号：US10560273

申请日：2004-06-09

Applicant: Elwood Norris ,  James Croft

Inventor： Elwood Norris ,  James Croft

IPC: H04B3/00

CPC classification number: H04R1/403 ,  H04R2201/401 ,  H04R2217/03 ,  H04R2430/20

Abstract: A system for providing audio information to persons in an approach path (12) includes an interaction point (14), and an approach path (12) leading to the interaction point. A parametric sound system (18) is provided, which includes a parametric speaker (20) disposed adjacent to the interaction point. The parametric sound system is configured for limited delivery of sound in a spatially limited audio zone (24) along the approach path (12), within a decibel level above ambient noise levels in the area of the interaction point (14), and sufficiently high to be heard primarily by a person progressing along the approach path (12). The interaction point can be a cashier station, and the system can also include a video display (16) configured to provide video information to persons in the approach path along with the audio information.

Abstract translation: 用于向接近路径（12）中的人提供音频信息的系统包括交互点（14）和通向交互点的进场路径（12）。 提供参数声音系统（18），其包括邻近交互点设置的参数扬声器（20）。 参数声音系统被配置为在相互作用点（14）的区域内的高于环境噪声水平的分贝水平内沿着接近路径（12）在空间有限的音频区域（24）中有限地传送声音，并且足够高 主要由沿着进近路径进行的人员（12）进行听取。 交互点可以是收银台，并且系统还可以包括视频显示器（16），其被配置为向进场路径中的人提供视频信息以及音频信息。

公开(公告)号：US20050089176A1

公开(公告)日：2005-04-28

申请号：US10984343

申请日：2004-11-08

Applicant: Elwood Norris ,  Joseph Norris ,  James Croft

Inventor： Elwood Norris ,  Joseph Norris ,  James Croft

IPC: H04R3/00 ,  H04R17/00 ,  H04B3/00 ,  H04B5/00

CPC classification number: H04R17/00 ,  H04R2217/03

Abstract: A parametric loudspeaker which uses multiple piezoelectric bimorph transducers. These multiple piezoelectric bimorphs have a resonant frequency which varies from unit to unit. The phase response at and near the resonant frequency changes at a very high rate with slight changes in frequency. The associated modulator electronics have a primary carrier frequency that is optimized for maximum parametric output. This is achieved by aligning the carrier frequency with the flattest portions of the phase curve for maximum phase coordination among the multiple devices.

公开(公告)号：US20050244016A1

公开(公告)日：2005-11-03

申请号：US11121151

申请日：2005-05-02

Applicant: Elwood Norris ,  James Croft

Inventor： Elwood Norris ,  James Croft

IPC: H04B3/00 ,  H04B5/00

CPC classification number: H04B5/0006

Abstract: A method is disclosed for generating parametric audio output based on the interaction of multiple ultrasonic outputs within air as a nonlinear medium. The method includes the step of generating an electronic signal comprising at least two ultrasonic signals having a difference in value which falls within an audio frequency range. The electronic signal can be transferred to an electrostatic emitter diaphragm which couples directly with the air as part of a single stage energy conversion process. The electronic signal can be converted at the diaphragm directly to a mechanical displacement as a driver member of a parametric speaker. The ultrasonic signals can be mechanically emitted from the diaphragm into the air as ultrasonic compression waves which interact within the air to generate the parametric audio output.

Abstract translation: 公开了一种基于空气中的多个超声波输出作为非线性介质的相互作用产生参数音频输出的方法。 该方法包括产生电子信号的步骤，该电子信号包括至少两个具有属于音频范围内的差值的超声波信号。 电子信号可以被传送到静电发射器隔膜，其直接与空气耦合，作为单级能量转换过程的一部分。 电子信号可以在隔膜处直接转换为机械位移，作为参数扬声器的驱动器构件。 超声信号可以从隔膜机械地发射到空气中，作为在空气中相互作用以产生参数音频输出的超声波压缩波。

公开(公告)号：US20060233404A1

公开(公告)日：2006-10-19

申请号：US11196803

申请日：2005-08-02

Applicant: James Croft ,  Elwood Norris

Inventor： James Croft ,  Elwood Norris

IPC: H04R25/00

CPC classification number: H04R1/403 ,  H04R1/30 ,  H04R17/005 ,  H04R31/00 ,  H04R2201/401 ,  H04R2217/03

Abstract: A system and method is disclosed for a parametric emitter array with enhanced emitter-to-air acoustic coupling. The system comprises a plate support member having opposing first and second faces separated by an intermediate plate body. The plate body can have a plurality of conduits configured as an array of acoustic horns. Each horn can have a small throat opening at the first face and an intermediate horn section which diverges to a broad mouth opening at the second face. An emitter membrane can be positioned in direct contact with the first face and extending across the small throat openings. The emitter membrane can be biased by (i) applying tension to the emitter membrane extending across the throat openings, (ii) displacing the emitter membrane into a non-planar configuration, and (iii) capturing the emitter membrane at the first face using an adhesive substance. A variable electrical signal can be applied to the emitter membrane for propagation through the intermediate horn section and out the broad mouth opening at the second face.

Abstract translation: 公开了一种具有增强的发射器对空气声耦合的参数发射极阵列的系统和方法。 该系统包括具有由中间板体分隔的相对的第一和第二表面的板支撑构件。 板体可以具有构造为声喇叭阵列的多个导管。 每个喇叭可以在第一面具有小的喉部开口，并且在第二面处分散到宽口开口的中间喇叭部分。 发射器膜可以定位成与第一面直接接触并且延伸穿过小喉部开口。 发射体膜可以通过（i）向延伸穿过喉部开口的发射器膜施加张力，（ii）将发射器膜置于非平面构型中，以及（iii）使用 粘合剂物质。 可变电信号可以施加到发射器膜，以通过中间喇叭部分传播，并且在第二面处从宽开口开口。

公开(公告)号：US20050226438A1

公开(公告)日：2005-10-13

申请号：US10529013

申请日：2003-03-18

Applicant: Elwood Norris ,  James Croft

Inventor： Elwood Norris ,  James Croft

IPC: H04B3/00 ,  H04B3/56 ,  H04R27/00 ,  H04R27/04

CPC classification number: F41H13/0081 ,  G10K15/02 ,  H04B3/56 ,  H04R27/00 ,  H04R27/04 ,  H04R2217/03

Abstract: A sound emitting device (10) for providing at least one new sonic or subsonic frequency as a by-product of emitting a waveform of at least two ultrasonic frequencies whose difference in value corresponds to the desired new sonic or subsonic frequency. The device includes a parametric emitting perimeter or plurality of emitter segments (13) positioned around a central open section (15). This open section (15) is structured with a diagonal width greater than a cross-sectional diagonal of the parametric emitting perimeter. An ultrasonic frequency source (60) and sonic/subsonic frequency generator (62) arc coupled together to a modulating circuit (61) for mixing an ultrasonic frequency signal with an electrical signal corresponding to the at least one new sonic or subsonic frequency. The modulator output is coupled to the emitting perimeter (64) which comprises ultrasonic frequency emitting material for propagating the mixed waveform into air for demodulating the waveform to generate the at least one new sonic or subsonic frequency.

Abstract translation: 一种声发射装置（10），用于提供至少一种新的声音或亚音速频率作为发射至少两个超声波频率的波形的副产物，其差值对应于期望的新的声音或亚音速频率。 该装置包括围绕中心开口部分（15）定位的参数发射周界或多个发射器部分（13）。 这个开放部分（15）被构造成具有大于参数发射周界的横截面对角线的对角线宽度。 超声频率源（60）和声音/亚音速频率发生器（62）一起耦合到调制电路（61），用于将超声频率信号与对应于至少一个新的声音或亚音速频率的电信号混合。 调制器输出耦合到发射周边（64），其包括用于将混合波形传播到空气中的超声波发射材料，用于解调波形以产生至少一个新的声音或亚音速频率。

公开(公告)号：US20050281413A1

公开(公告)日：2005-12-22

申请号：US11181363

申请日：2005-07-13

Applicant: James Croft

Inventor： James Croft

IPC: H04B3/00 ,  H04B5/00 ,  H04R3/00

CPC classification number: H04B5/0006 ,  H04R3/00 ,  H04R2217/03

Abstract: A parametric loudspeaker system and method for reducing distortion in a decoupled audio wave by creating a double sideband parametric ultrasonic signal that substantially approximates a non-square-rooted modulation envelope and emitting a parametric ultrasonic wave that corresponds to the double sideband parametric ultrasonic signal from a parametric loudspeaker at a sufficient amplitude to drive the surrounding air into saturation.

Abstract translation: 一种参数化扬声器系统和方法，用于通过产生基本近似非平方根调制包络并发射对应于双边带参数超声波信号的参数超声波的双边带参数超声波信号来减小解耦音频波中的失真， 参数扬声器以足够的幅度驱动周围空气饱和。

公开(公告)号：US20050195985A1

公开(公告)日：2005-09-08

申请号：US11065698

申请日：2005-02-24

Applicant: James Croft ,  Wensen Liu

Inventor： James Croft ,  Wensen Liu

IPC: H04R17/00 ,  H04B3/00 ,  H03G5/00 ,  H04B1/02

CPC classification number: H04R17/00 ,  H04R2217/03

Abstract: A parametric sound system for creating an acoustical column along an axis of propagation having a quiet zone an audible zone is disclosed. The system comprises a parametric electro-acoustic emitter configured for emitting a plurality of focalized parametric ultrasonic waves. A plurality of decoupled acoustic waves are maximized at a focalizing area within the audible zone. The system also includes a signal source for applying a parametric ultrasonic signal to the parametric electroacoustic emitter. The signal includes an ultrasonic carrier signal and one or more sideband signals corresponding to an audio input signal. The system further comprises a signal processor for controlling phases of the parametric ultrasonic signal so that the plurality of focalized parametric ultrasonic waves emitted by the parametric electro-acoustic emitter will create a quiet zone along the same direction of propagation as the audible zone. The plurality of decoupled audio waves are substantially in phase within the audible zone while the plurality of decoupled audio waves are largely out-of-phase within the quiet zone.

Abstract translation: 公开了一种用于沿着具有安静区域的声音区域的传播轴线产生声柱的参数声音系统。 该系统包括被配置为发射多个聚焦参数超声波的参数电声发射器。 多个解耦声波在可听区域内的聚焦区域被最大化。 该系统还包括用于将参数超声波信号施加到参数电声发射器的信号源。 信号包括超声波载波信号和对应于音频输入信号的一个或多个边带信号。 该系统还包括用于控制参数超声波信号的相位的信号处理器，使得由参数电声发射器发射的多个聚焦参数超声波将沿着与可听区域相同的传播方向产生安静区域。 多个解耦音频波在可听区域内基本上同相，而多个解耦音频波在安静区域内大体上是异相的。

公开(公告)号：US20070127767A1

公开(公告)日：2007-06-07

申请号：US11606403

申请日：2006-11-28

Applicant: James Croft ,  David Graebener

Inventor： James Croft ,  David Graebener

IPC: H04R25/00

CPC classification number: H04R9/047

Abstract: A substantially single-ended planar-magnetic transducer comprises a thin film, diaphragm having a first surface side and a second surface side and including a conductive surface area for converting an input electrical signal into a corresponding acoustic output, said at least one diaphragm including a predetermined active region. A high energy magnetic structure has sufficient magnetic field strength and is configured with respect to the diaphragm to drive the diaphragm as a substantially single-ended audio transducer. Mounting structure is coupled to the diaphragm to hold the diaphragm in a predetermined state of tension and at a predetermined distance from the high energy magnetic structure over an extended period of time including periods of use and nonuse. The diaphragm provides improved performance characteristics by using a polyethylenenaphthalate film as a base material for the diaphragm.

Abstract translation: 基本上单端的平面磁换能器包括薄膜，具有第一表面侧和第二表面侧的隔膜，并且包括用于将输入电信号转换成对应声输出的导电表面区域，所述至少一个隔膜包括 预定的活动区域。 高能磁结构具有足够的磁场强度，并且相对于隔膜构造以驱动隔膜作为基本上单端的音频换能器。 安装结构联接到隔膜，以将隔膜保持在预定的张力状态并且在包括使用时间和不使用的延长的时间段内与高能磁性结构预定距离。 隔膜通过使用聚萘二甲酸乙二醇酯膜作为隔膜的基材提供了改进的性能特征。

公开(公告)号：US20070003076A1

公开(公告)日：2007-01-04

申请号：US11515098

申请日：2006-09-01

Applicant: James Croft

Inventor： James Croft

IPC: H03G5/00

CPC classification number: H04R1/2842 ,  H04R1/2834 ,  H04R1/2849

Abstract: A bandpass loudspeaker enclosure having three sub chambers, a first subchamber being a Helmholtz-reflex chamber with a passive acoustic radiator operating in parallel with the transducer, and the remaining two chambers utilizing two passive acoustic radiators to achieve three Helmholtz-reflex vent tunings and a multiple of low pass acoustic filters that provide an acoustic bandpass with reduced diaphragm displacement and substantially reduced distortion and pipe resonances above the pass band. A further embodiment provides a reduced lowest frequency vent size for a given low frequency subchamber size and tuning frequency.

Abstract translation: 具有三个子室的带通扬声器壳体，第一子室是亥姆霍兹反射室，具有与换能器平行运行的无源声辐射器，其余两个室利用两个无源声辐射器来实现三个亥姆霍兹反射通气调节 多个低通声学滤波器，其提供具有减小的隔膜位移的声带，并且在通带之上大大减少失真和管道谐振。 进一步的实施例为给定的低频子室尺寸和调谐频率提供了降低的最低频率排气孔尺寸。

公开(公告)号：US20080063214A1

公开(公告)日：2008-03-13

申请号：US11651944

申请日：2007-01-09

Applicant: Michael Spencer ,  James Croft ,  Joseph Norris

Inventor： Michael Spencer ,  James Croft ,  Joseph Norris

IPC: H04B3/00

CPC classification number: H04R3/00 ,  H04R2217/03

Abstract: A parametric loudspeaker system using improved modulators to compensate for the non-linearity of the parametric process in air when driving the air at saturation levels and below saturation levels. The parametric loudspeaker uses a pre-processed single sideband modulator that offers ideal linearity as characterized by square root pre-processed double sideband modulators but with a lower carrier frequency and without the wide bandwidth requirements. By eliminating some or all of the lower sideband the carrier frequency can be reduced without producing sideband frequencies in the audible range. Lower operational frequencies result in greater translation efficiency and greater output capability before reaching the saturation limit of air. A pre-processor minimizes the effects of saturation limits for double sideband, truncated double sideband or single sideband processing to achieve superior output.

Abstract translation: 参数化扬声器系统，其使用改进的调制器来补偿在饱和水平和低于饱和水平下驱动空气时空气中的参数过程的非线性。 参数化扬声器使用预处理的单边带调制器，其提供理想的线性度，其特征在于平方根预处理的双边带调制器，但是具有较低的载波频率并且没有宽带宽要求。 通过消除部分或全部低边带，可以减小载波频率，而不会在可听范围内产生边带频率。 较低的操作频率在达到空气饱和极限之前会产生更大的翻译效率和更大的输出能力。 预处理器最大限度地减少了双边带，截断双边带或单边带处理的饱和限制的影响，以实现卓越的输出。