公开(公告)号：EP0746393A4

公开(公告)日：1999-09-08

申请号：EP94928600

申请日：1994-09-14

申请人： AURA SYSTEMS INC

发明人： SHULTZ LAWRENCE ,  VINCENT RICHARD ,  TUNG DAVID

IPC分类号： H03G5/02 ,  A63F13/00 ,  H04R5/04 ,  A63F9/24 ,  H04N5/00

CPC分类号： H04R5/04

摘要： A multifunction amplifier device for matching an audio signal from an audio signal source, such as a video game, stereo or movie, to a pre-determined frequency of a transducer is disclosed. The amplifier device includes a low pass filter coupled to the audio signal source for developing a filtered signal from the audio signal. A frequency dividing circuit is coupled to the low pass filter for dividing the frequencies of the filtered signal by a pre-determined factor. The amplifier device futher includes a decoding circuit coupled to said low pass filter for selecting between a left and a right audio channel of the filtered signal and developing a decoded signal and a muting circuit coupled to the decoding circuit. The muting circuit only passes the decoded signal at levels above a variable threshold level. A power amplifier is coupled to the frequency dividing circuit and the muting circuit for amplifying the audio signal into an amplified signal having a frequency level corresponding to the pre-determined frequency of the transducer.

摘要翻译： 公开了一种用于将音频信号源（例如视频游戏，立体声或电影）的音频信号与换能器的预定频率进行匹配的多功能放大器装置。 放大器装置包括耦合到音频信号源的低通滤波器，用于从音频信号开发滤波后的信号。 分频电路耦合到低通滤波器，用于将滤波信号的频率除以预定因子。 放大器装置还包括耦合到所述低通滤波器的解码电路，用于在滤波信号的左声道和右声道之间进行选择，并显现解码信号和耦合到解码电路的静噪电路。 静音电路仅在高于可变阈值电平的电平上传递解码信号。 功率放大器耦合到分频电路和静音电路，用于将音频信号放大为具有与换能器的预定频率对应的频率电平的放大信号。