论文部分内容阅读
伪随机噪声比较接近于自然声。它具有真正随机噪声的许多性质而在应用上又有很多优点。本文作者以伪随机噪声对正常人和有听力缺陷的人作了听觉诱发电位的频谱分析。作者从颅顶处插入皮下白金针形电极和互相连接的两耳耳垂处的金耳夹电极引导听觉诱发电位,而在前额中央置一接地电极。实验在隔音的电屏蔽室中进行。作者把伪随机噪声经过滤波放大之后推动扬声器作为刺激,这里有三种情形:(1)带宽为100赫兹的窄带信号;(2)通频带为1.5～3.0千赫的宽带信号;
Pseudo-random noise is relatively close to natural sound. It has many properties of true random noise and has many advantages in application. The authors used pseudo-random noise to make auditory evoked potential spectrum analysis for normal and hearing-impaired individuals. The authors inserted a subcutaneous white gold needle electrode at the top of the skull and a gold-ear clip electrode at the earlobe of both ears connected to each other to guide the auditory evoked potentials while placing a ground electrode at the center of the forehead. Experiments were conducted in sound-insulated electrical shielded rooms. There are three cases here: (1) narrowband signal with a bandwidth of 100 Hz; (2) wideband signal with a passband of 1.5 ~ 3.0 kHz;