窄带

yǒu yán jiū xiǎn shì kuān dài yòng hù bǐ zhǎi dài yòng hù gèng jiā méi yǒu nài xīn

有研究显示，宽带用户比窄带用户更加没有耐心。

Research shows that broadband customers have less patience than narrowband customers.

zhǎi dài tōng lù

窄带通路

narrow-band path

gāi xì tǒng néng fā chū chún yīn zhuàn yīn zhǎi dài zào shēng hé zì rán shēng děng shēng yīn xìn hào bìng kě duì xìn hào jìn xíng yī dìng jīng dù de xiǎng dù hé pín lǜ tiáo jié

该系统能发出纯音、啭音、窄带噪声和自然声等声音信号，并可对信号进行一定精度的响度和频率调节。

The system can issue a pure tone, tone twitter, narrowband noise and natural sound of the voice signal, and can adjust the loudness and frequency of the signals with some accuracy.