A telephone, for example, converts sound energy to an electrical signal and back again to audio to enable conversation.
例如，电话把声能转换为电信号并重新转换回声频来启动对话。
By studying the principle of hearing system in identification of sound signal, a method of feature extraction for passive sonar target based on critical band spectrum energy is proposed.
利用被动声纳目标辐射噪声特征主要集中在低频部分的特点，结合听觉系统识别声音信号的原理，提出了一种被动声纳目标临界频带频谱能量的特征提取方法。
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