cn_speech_commands_recognition中文语音识别不准确 (AIS-1749)

[monskate]

Checklist

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Issue or Suggestion Description

当我使用cn_speech_commands_recognition时，使用识别“前进”一词，但是当说出“千金”时仍判断为识别到前进 ，不区分声调

[sun-xiangyu]

@monskate , 这个是我们故意的，对相似发音都触发，进行模糊识别，提高识别率。