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Public address system and method for an urban transit vehicle

机译:用于城市运输车辆的公共广播系统和方法

摘要

Apparatus and method for allowing an operator of a transit vehicle to make public address announcements to passengers internal and external to the vehicle. The safety of the vehicle and passengers is maintained through providing a hands-free directional microphone having noise canceling characteristics. The microphone is used as an input device for receiving an audio signal and provides the signal to a processing module that converts the signal into a digital signal. The digital signal is than processed by a digital signal processor to cancel undesirable noise common to a transit vehicle. The noiseless signal can then be converted into an analog signal and recorded within the memory of the public address system where, upon needed, the signal can be transferred to an output device such as a speaker system internal or external to the vehicle. After playback, the recorded message can also be easily repeated by means of a.repeat-switch.
机译:用于允许过境车辆的操作者向车辆内部和外部的乘客发布公共广播的设备和方法。通过提供具有噪声消除特性的免提定向麦克风来保持车辆和乘客的安全。麦克风用作用于接收音频信号的输入设备,并将该信号提供给处理模块,该处理模块将信号转换为数字信号。然后,数字信号由数字信号处理器处理以消除运输车辆常见的不希望的噪声。然后可以将无噪声信号转换为模拟信号,并记录在公共广播系统的内存中,在需要时,该信号可以传输到车辆内部或外部的输出设备,例如扬声器系统。播放后,还可以通过重复播放开关轻松重复录制的消息。

著录项

  • 公开/公告号US2003194096A1

    专利类型

  • 公开/公告日2003-10-16

    原文格式PDF

  • 申请/专利权人 DIGITAL RECORDERS INC.;

    申请/专利号US20030417383

  • 发明设计人 JOHN R. ROWLETTE;JAMES D. KENNEDY;

    申请日2003-04-16

  • 分类号H04R27/00;

  • 国家 US

  • 入库时间 2022-08-22 00:10:50

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