speech bandwidth

例句：

1. 1. The speechbandwidth of the new device is significantly higherthan that of the old one.
   这款新设备的语音带宽远高于旧设备。
2. 2. In orderto improve the quality of audio, weneed to increase the speech bandwidth.
   为了提高音频质量，我们需要增加语音带宽。
3. 3. Thespeech bandwidth is a crucial factor in determiningthe performance of a communication system.
   语音带宽是决定通信系统性能的关键因素。