希尔贝壳中文普通话语音数据库AISHELL-2的语音时长为1000小时，其中718小时来自AISHELL-ASR0009-[ZH-CN]，282小时来自AISHELL-ASR0010-[ZH-CN]。录音文本涉及唤醒词、语音控制词、智能家居、无人驾驶、工业生产等12个领域。录制过程在安静室内环境中， 同时使用3种不同设备： 高保真麦克风（44.1kHz，16bit）；Android系统手机（16kHz，16bit）；iOS系统手机（16kHz，16bit）。AISHELL-2采用iOS系统手机录制的语音数据。1991名来自中国不同口音区域的发言人参与录制。经过专业语音校对人员转写标注，并通过严格质量检验，此数据库文本正确率在96%以上。（支持学术研究，未经允许禁止商用。）

AISHELL-2 is a 1000-hour Mandarin Chinese Speech Corpus. 718 hours are from AISHELL-ASR0009-[ZH-CN] and 282 hours are from AISHELL-ARS0010-[ZH-CN]. The speech utterance contains 12 domains, including keywords, voice command, smart home, autonomous driving, industrial production, etc.The recording was put in quiet indoor environment, using 3 different devices in parallel: high fidelity microphone (44.1kHz, 16-bit); Android-system mobile phone (16kHz, 16-bit), iOS-system mobile phone (16kHz, 16-bit). AISHELL-2 choose audio data record by iOS-system.1991 speakers from different accent areas in China were participate in this recording. The manual transcription accuracy rate is above 96%, through professional speech annotation and strict quality inspection.( This database is free for academic research, not in the commerce, if without permission. )