公开(公告)号：US5933506A

公开(公告)日：1999-08-03

申请号：US441988

申请日：1995-05-16

申请人： Shigeaki Aoki ,  Kazumasa Mitsuhashi ,  Yutaka Nishino ,  Kohichi Matsumoto ,  Chikara Yuse ,  Hiroyuki Matsui

发明人： Shigeaki Aoki ,  Kazumasa Mitsuhashi ,  Yutaka Nishino ,  Kohichi Matsumoto ,  Chikara Yuse ,  Hiroyuki Matsui

IPC分类号： H04R1/46 ,  H04R3/00 ,  H04R25/00

CPC分类号： H04R1/46 ,  H04R3/005 ,  H04R2460/13

摘要： Ear-piece type acoustic transducing part is provided with a bone-conducted sound pickup microphone for picking up a bone-conducted sound, a directional microphone for picking up an air-conducted sound and an electro-acoustic transducer for transducing a received speech signal to a received speech sound. A transmitting-receiving circuit connected to the acoustic transducing part includes: a low-pass filter which permits the passage therethrough of low-frequency components in a bone-conducted sound signal from the bone-conducted sound pickup microphone; a high-pass filter which permits the passage therethrough of high-frequency components in an air-conducted sound signal from the directional microphone; first and second variable loss circuits which impart losses to the outputs from the low-pass filter and the high-pass filter, respectively; a comparison/control circuit which compares the output levels of the low-pass filter and the high-pass filter with predetermined first and second reference levels, respectively, and based on the results of comparison, controls losses that are set in the first and second variable loss circuits; and a combining circuit which combines the outputs from the first and second variable loss circuits into a speech sending signal.

摘要翻译： 耳机式声学传感部件设置有用于拾取骨传导声音的骨传导拾音麦克风，用于拾取空气传导声音的定向麦克风和用于将接收到的语音信号转换的电声换能器 接收到的语音 连接到声学传感部分的发射接收电路包括：低通滤波器，其允许来自骨导声音传声器的骨传导声音信号中的低频分量的通过; 高通滤波器，其允许来自定向麦克风的空气传导声音信号中的高频分量的通过; 分别对来自低通滤波器和高通滤波器的输出赋予损耗的第一和第二可变损耗电路; 比较/控制电路，其分别将低通滤波器和高通滤波器的输出电平与预定的第一和第二参考电平进行比较，并且基于比较结果，控制在第一和第二参考电平中设置的损耗 可变损耗电路; 以及将来自第一和第二可变损耗电路的输出组合成语音发送信号的组合电路。