公开(公告)号：US4400591A

公开(公告)日：1983-08-23

申请号：US284585

申请日：1981-07-17

申请人： Daniel E. Jennings ,  Richard S. Woodling

发明人： Daniel E. Jennings ,  Richard S. Woodling

IPC分类号： A42B3/30 ,  H04M1/05 ,  H04R27/04

CPC分类号： H04R27/04 ,  A42B3/30 ,  H04M1/05

摘要： A helmet having a built-in modulator and amplifier for voice alteration and projection is disclosed. The helmet includes a forwardly projecting nose housing having a viewing shield and an array of light emitting diodes. The light emitting diodes are coupled to the amplifier through a driver in which selected groups of the diodes are illuminated according to the intensity of the audio signal delivered by the amplifier. A loud speaker is mounted within the nose housing and is enclosed by a sidewall baffle. A microphone is mounted on the outside of the baffle and is connected to an audio alteration unit within the enclosure which includes an analog multiplier, a sine wave oscillator and an audio amplifier. The multiplier has an audio output corresponding to the product of the voice signal produced by the microphone and the sine wave oscillator signal. This produces a modulation effect which simulates an alien sound.

摘要翻译： 公开了一种具有用于语音改变和投影的内置调制器和放大器的头盔。 头盔包括具有观察屏蔽和发光二极管阵列的向前突出的鼻子壳体。 发光二极管通过驱动器耦合到放大器，驱动器根据由放大器传送的音频信号的强度照亮所选择的二极管组。 扬声器安装在鼻罩内，并被侧壁挡板包围。 麦克风安装在挡板的外部，并连接到机箱内的音频变换单元，其包括模拟乘法器，正弦波振荡器和音频放大器。 乘法器具有对应于由麦克风产生的语音信号与正弦波振荡器信号的乘积的音频输出。 这产生了模拟外来声音的调制效果。